RedNotebook 1.6.6
A new RedNotebook version has been released. You can get the tarball, Windows installer and links to distribution packages at http://rednotebook.sourceforge.net/downloads.html What is RedNotebook? RedNotebook is a **graphical journal** and diary helping you keep track of notes and thoughts. It includes a calendar navigation, customizable templates, export functionality and word clouds. You can also format, tag and search your entries. RedNotebook is available in the repositories of most common Linux distributions and a Windows installer is available. It is written in Python and uses GTK+ for its interface. What's new in this version? --- * Edit templates in RedNotebook directly. Preview and use the Insert and Format toolbar menus before inserting a template. * Support relative image links like [my_pic.jpg]. * Add Ctrl+Return shortcut for adding manual linebreaks. * Let all toolbar menus always open the menu before performing an action. * Change Go-To-Today shortcut to Alt+Home (Ctrl+Home moves cursor to the start of the text). * Do not allow choosing an empty name for templates. * Do not parse #include as a hashtag. * Add info about network drives to help text. * Fix help text about links to local directories. * Fix: Let categories pane use new infobar notifications (LP:1098625). Cheers, Jendrik -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations/
PyWart fixed mostly, was: Re: Python Gotcha's?
On Apr 14 2012, 2:47 pm I wrote: Miki Tebeka wrote: If you have an interesting/common Gotcha (warts/dark corners ...) please share. Python 3(K) likes to use the same '.py' file extension as its incompatible predecessors, and in some/many/most *nix implementations, it likes to install in the same place. Python 3 is an improvement upon Python 2, but Python went from, sure... Python just works, to, well... that depends... which Python? My gotcha is addressed by PEP 394, The 'python' Command on Unix- Like Systems, and PEP 397, A Python launcher for Windows. They alleviate much of that pain and suffering of running both Python 2.x and 3.x. On *nix systems, if a Python 2 interpreter is available it should be runnable as python2. If Python 3 is available, it should runnable as python3. The modern Python shebang line is #!/usr/bin/env python3. [PEP 394] On Microsoft Windows, the latest and greatest Python installation, 3.3, no longer usurps the .py extension for its own version-specific interpreter. It associates .py with a multi-version launcher, called py, that makes a reasonable attempt to do the right thing py-version- wise. The modern shebang line will help even on MS-Windows. [PEP 397] There's room for improvement. The launcher invocation, py, should work on Unix. And everywhere it runs it should respect shebang lines that name itself. The modern shebang line ought to be #!/usr/bin/env py -3 (but it's not yet so don't use it). The other big idea in supporting multiple Pythons is virtual environments. Python 3.3 has PEP 405, virtual environments in the core. Unfortunately the aforementioned PEP 397 windows launcher, also in Python 3.3, ignores an active virtual environment. Be warned. -Bryan -- http://mail.python.org/mailman/listinfo/python-list
Re: handling return codes from CTYPES
Duncan, Mike, MRAB, Thank you. New technology set, same forgotten lesson - RTFM (all of it!). Thanks also for the clarification on discarding objects and Garbage Collection. Looks like I'll have to turn a large chunk of my previous understanding of (mainframe) languages 'inside out'. I'm just wondering how often I'll have to chant it isn't a variable, it's a name bound to an object before I can write a chunk of code without spending ages pondering why it isn't working. I already like Python for its clean design but I think it'll be a while before I love it completely. Steve On 21/01/2013 11:11, Duncan Booth wrote: Tell the function what type to return before you call it: InitScanLib = sLib.InitScanLib InitScanLib.restype = c_short See http://docs.python.org/2/library/ctypes.html#return-types You can also tell it what parameter types to expect which will make calling it simpler. -- http://mail.python.org/mailman/listinfo/python-list
Re: Sending a broadcast message using raw sockets
Peter Steele wrote in news:0c2b3482-df46-4324-8bf9-2c45d3f6b...@googlegroups.com in comp.lang.python: On Monday, January 21, 2013 1:10:06 AM UTC-8, Rob Williscroft wrote: Peter Steele wrote in news:f37ccb35-8439-42cd-a063-962249b44...@googlegroups.com in comp.lang.python: I want to write a program in Python that sends a broadcast message [snip] This is part of my Wake-On-Lan script: def WOL_by_mac( mac, ip = 'broadcast', port = 9 ): [snip] Thanks for the code sample. Does this code work if the box has no IP or default route assigned? I'm away from the office at the moment so I can't test this. No idea, but the sockets system must be up and running before the card (interface) has an IP (otherwise how would it ever get assigned) and I presume DHCP works in a similar manner. However the route assignemt is irrelevent, broadcast messages never get routed. Rob -- -- http://mail.python.org/mailman/listinfo/python-list
Retrieving the full command line
[Python 2.7/3.3 (and hg tip) running on Windows. Not Windows-specific, though]. I use the python -mpackage incantation to run a package which has a __main__.py module and which uses relative imports internally. I'm developing under cherrypy which includes a reloader for development. The reloader attempts to rebuild the original command line by combining sys.executable and sys.argv and then does an execv. There does not appear to be any way within Python of determining the command line I used. The combination of sys.executable and sys.argv in this case will look like: c:\python33\python.exe app/__main__.py. But running this precludes the use of package-relative imports. I can pull the command line out of the Windows API to solve this specific problem, but is there not a gap here? Even if sys.flags somehow indicated the -m (it doesn't) that wouldn't give me the filepath which it used. Have I missed something? TJG -- http://mail.python.org/mailman/listinfo/python-list
Using filepath method to identify an .html page
Hello, i decided to switch from embedding string into .html to actually grab the filepath in order to identify it: # = # open current html template and get the page ID number # === f = open( page ) # read first line of the file firstline = f.readline() # find the ID of the file and store it pin = re.match( r'!-- (\d+) --', firstline ).group(1) = This is what i used to have. Now, can you pleas help me write the switch to filepath identifier? I'am having trouble writing it. -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
On Tue, 22 Jan 2013 02:07:54 -0800, Ferrous Cranus wrote: Hello, i decided to switch from embedding string into .html to actually grab the filepath in order to identify it: What do you think the filepath means, and how do you think you would grab it? I can only guess you mean the full path to the file, like: /home/steve/mypage.html C:\My Documents\mypage.html Is that what you mean? # open current html template and get the page ID number f = open( page ) # read first line of the file firstline = f.readline() # find the ID of the file and store it pin = re.match( r'!-- (\d+) --', firstline ).group(1) This is what i used to have. Now, can you pleas help me write the switch to filepath identifier? I'am having trouble writing it. I don't understand the question. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
# == # produce a hash based on html page's filepath and convert it to an integet, that will be uses to identify the page itself. # == pin = int( hashlib.md5( htmlpage ) ) I just tried that but it produced an error. What am i doing wrong? -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
# # produce a hash string based on html page's filepath and convert it to an integer, that will then be used to identify the page itself # pin = int( hashlib.md5( htmlpage ) ) This fails. why? htmlpage = a string respresenting the absolute path of the requested .html file hashlib.md5( htmlpage ) = conversion of the above string to a hashed string int( hashlib.md5( htmlpage ) ) = conversion of the above hashed string to a number Why this fails? -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
Ferrous Cranus nikos.gr...@gmail.com writes:
pin = int( hashlib.md5( htmlpage ) )
This fails. why?
htmlpage = a string respresenting the absolute path of the requested .html
file
hashlib.md5( htmlpage ) = conversion of the above string to a hashed string
No, that statement does not convert a string into another, but rather
returns a md5 HASH object:
import hashlib
hashlib.md5('foo')
md5 HASH object @ 0xb76dbcf0
Consulting the hashlib documentation[1], you could learn about that
object's methods.
int( hashlib.md5( htmlpage ) ) = conversion of the above hashed string to a
number
Why this fails?
Because in general you can't convert an arbitrary object instance (in
your case an hashlib.HASH instance) to an integer value. Why do you need
an integer? Isn't hexdigest() what you want?
print _.hexdigest()
acbd18db4cc2f85cedef654fccc4a4d8
Do yourself a favor and learn using the interpreter to test your
snippets line by line, most problems will find an easy answer :-)
ciao, lele.
[1] http://docs.python.org/2.7/library/hashlib.html#module-hashlib
--
nickname: Lele Gaifax | Quando vivrò di quello che ho pensato ieri
real: Emanuele Gaifas | comincerò ad aver paura di chi mi copia.
l...@metapensiero.it | -- Fortunato Depero, 1929.
--
http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
On Tue, Jan 22, 2013 at 10:53 PM, Ferrous Cranus nikos.gr...@gmail.com wrote: # == # produce a hash based on html page's filepath and convert it to an integet, that will be uses to identify the page itself. # == pin = int( hashlib.md5( htmlpage ) ) I just tried that but it produced an error. What am i doing wrong? First and foremost, here's what you're doing wrong: You're saying it produced an error. Python is one of those extremely helpful languages that tells you, to the best of its ability, exactly WHAT went wrong, WHERE it went wrong, and - often - WHY it failed. For comparison, I've just tonight been trying to fix up a legacy accounting app that was written in Visual BASIC back when that wouldn't get scorn heaped on you from the whole world. When we fire up one particular module, it bombs with a little message box saying File not found. That's all. Just one little message, and the application terminates (uncleanly, at that). What file? How was it trying to open it? I do know that it isn't one of its BTrieve data files, because when one of THEM isn't found, the crash looks different (but it's still a crash). My current guess is that it's probably a Windows DLL file or something, but it's really not easy to tell... ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
On 01/22/2013 07:02 AM, Ferrous Cranus wrote: # # produce a hash string based on html page's filepath and convert it to an integer, that will then be used to identify the page itself # pin = int( hashlib.md5( htmlpage ) ) This fails. why? htmlpage = a string respresenting the absolute path of the requested .html file hashlib.md5( htmlpage ) = conversion of the above string to a hashed string int( hashlib.md5( htmlpage ) ) = conversion of the above hashed string to a number Why this fails? Is your copy/paste broken? It could be useful to actually show in what way it fails. The md5 method produces a HASH object, not a string. So int() cannot process that. To produce a digest string from the hash object, you want to call hexdigest() method. The result of that is a hex literal string. So you cannot just call int() on it, since that defaults to decimal. To convert a hex string to an int, you need the extra parameter of int: int(mystring, 16) Now, see if you can piece it together. -- DaveA -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
Τη Τρίτη, 22 Ιανουαρίου 2013 2:29:21 μ.μ. UTC+2, ο χρήστης Dave Angel έγραψε: On 01/22/2013 07:02 AM, Ferrous Cranus wrote: # # produce a hash string based on html page's filepath and convert it to an integer, that will then be used to identify the page itself # pin = int( hashlib.md5( htmlpage ) ) This fails. why? htmlpage = a string respresenting the absolute path of the requested .html file hashlib.md5( htmlpage ) = conversion of the above string to a hashed string int( hashlib.md5( htmlpage ) ) = conversion of the above hashed string to a number Why this fails? Is your copy/paste broken? It could be useful to actually show in what way it fails. The md5 method produces a HASH object, not a string. So int() cannot process that. To produce a digest string from the hash object, you want to call hexdigest() method. The result of that is a hex literal string. So you cannot just call int() on it, since that defaults to decimal. To convert a hex string to an int, you need the extra parameter of int: int(mystring, 16) Now, see if you can piece it together. htmlpage = a string respresenting the absolute path of the requested .html file What i want to do, is to associate a number to an html page's absolute path for to be able to use that number for my database relations instead of the BIG absolute path string. so to get an integer out of a string i would just have to type: pin = int( htmlpage ) But would that be unique? -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
Τη Τρίτη, 22 Ιανουαρίου 2013 2:47:16 μ.μ. UTC+2, ο χρήστης Ferrous Cranus έγραψε: Τη Τρίτη, 22 Ιανουαρίου 2013 2:29:21 μ.μ. UTC+2, ο χρήστης Dave Angel έγραψε: On 01/22/2013 07:02 AM, Ferrous Cranus wrote: # # produce a hash string based on html page's filepath and convert it to an integer, that will then be used to identify the page itself # pin = int( hashlib.md5( htmlpage ) ) This fails. why? htmlpage = a string respresenting the absolute path of the requested .html file hashlib.md5( htmlpage ) = conversion of the above string to a hashed string int( hashlib.md5( htmlpage ) ) = conversion of the above hashed string to a number Why this fails? Is your copy/paste broken? It could be useful to actually show in what way it fails. The md5 method produces a HASH object, not a string. So int() cannot process that. To produce a digest string from the hash object, you want to call hexdigest() method. The result of that is a hex literal string. So you cannot just call int() on it, since that defaults to decimal. To convert a hex string to an int, you need the extra parameter of int: int(mystring, 16) Now, see if you can piece it together. htmlpage = a string respresenting the absolute path of the requested .html file What i want to do, is to associate a number to an html page's absolute path for to be able to use that number for my database relations instead of the BIG absolute path string. so to get an integer out of a string i would just have to type: pin = int( htmlpage ) But would that be unique? Another error even without hasing anyhting http://superhost.gr to view it please -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
On Tue, Jan 22, 2013 at 11:47 PM, Ferrous Cranus nikos.gr...@gmail.com wrote: What i want to do, is to associate a number to an html page's absolute path for to be able to use that number for my database relations instead of the BIG absolute path string. so to get an integer out of a string i would just have to type: pin = int( htmlpage ) But would that be unique? The absolute path probably isn't that big. Just use it. Any form of hashing will give you a chance of a collision. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
On Tue, 22 Jan 2013 04:47:16 -0800, Ferrous Cranus wrote: htmlpage = a string respresenting the absolute path of the requested .html file That is a very misleading name for a variable. The contents of the variable are not a html page, but a file name. htmlpage = /home/steve/my-web-page.html # Bad variable name. filename = /home/steve/my-web-page.html # Better variable name. What i want to do, is to associate a number to an html page's absolute path for to be able to use that number for my database relations instead of the BIG absolute path string. Firstly, don't bother. What you consider BIG, your database will consider trivially small. What is it, 100 characters long? 200? Unlikely to be 300, since I think many file systems don't support paths that long. But let's say it is 300 characters long. That's likely to be 600 bytes, or a bit more than half a kilobyte. Your database won't even notice that. so to get an integer out of a string i would just have to type: pin = int( htmlpage ) No, that doesn't work. int() does not convert arbitrary strings into numbers. What made you think that this could possibly work? What do you expect int(my-web-page.html) to return? Should it return 23 or 794 or 109432985462940911485 or 42? But would that be unique? Wrong question. Just tell your database to make the file name an indexed field, and it will handle giving every path a unique number for you. You can then forget all about that unique number, because it is completely irrelevant to you, and safely use the path while the database treats it in the fastest and most efficient fashion necessary. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: handling return codes from CTYPES
On Tue, Jan 22, 2013 at 7:02 PM, Steve Simmons square.st...@gmail.com wrote: Thanks also for the clarification on discarding objects and Garbage Collection. Looks like I'll have to turn a large chunk of my previous understanding of (mainframe) languages 'inside out'. I'm just wondering how often I'll have to chant it isn't a variable, it's a name bound to an object before I can write a chunk of code without spending ages pondering why it isn't working. I already like Python for its clean design but I think it'll be a while before I love it completely. Yeah, it takes some getting used to. I've spent the past couple of decades writing imperative code with strict declarations and fairly close to the metal, and I still have one C++ module at work - but more and more, I'm pushing to write code in a modern high-level language like Python, where memory management isn't my problem, and failings in the code result in easily-readable (and catchable!) exceptions. I often fire up gdb for the C++ code at work, but usually a Python or Pike exception traceback is enough on its own. Learning curve, rewarded with immensely easier work. So many things are like that; life is all about figuring out which ones are worth the curve's effort. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
Τη Τρίτη, 22 Ιανουαρίου 2013 3:04:41 μ.μ. UTC+2, ο χρήστης Steven D'Aprano έγραψε: What do you expect int(my-web-page.html) to return? Should it return 23 or 794 or 109432985462940911485 or 42? I expected a unique number from the given string to be produced so i could have a (number = string) relation. What does int( somestring ) is returning really? i don;t have IDLE to test. Just tell your database to make the file name an indexed field, and it will handle giving every path a unique number for you. You can then forget all about that unique number, because it is completely irrelevant to you, and safely use the path while the database treats it in the fastest and most efficient fashion necessary. This counter.py will work on a shared hosting enviroment, so absolutes paths are BIG and expected like this: /home/nikos/public_html/varsa.gr/articles/html/files/index.html In addition to that my counter.py script maintains details in a database table that stores information for each and every webpage requested. My 'visitors' database has 2 tables: pin --- page hits (that's to store general information for all html pages) pin -refers to- page pin host hits useros browser date (that's to store detailed information for all html pages) (thousands of records to hold every page's information) 'pin' has to be a number because if i used the column 'page' instead, just imagine the database's capacity withholding detailed information for each and every .html requested by visitors!!! So i really - really need to associate a (4-digit integer = htmlpage's absolute path) Maybe it can be done by creating a MySQL association between the two columns, but i dont know how such a thing can be done(if it can). So, that why i need to get a unique number out of a string. please help. -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
On Wed, Jan 23, 2013 at 12:57 AM, Ferrous Cranus nikos.gr...@gmail.com wrote: Τη Τρίτη, 22 Ιανουαρίου 2013 3:04:41 μ.μ. UTC+2, ο χρήστης Steven D'Aprano έγραψε: What do you expect int(my-web-page.html) to return? Should it return 23 or 794 or 109432985462940911485 or 42? I expected a unique number from the given string to be produced so i could have a (number = string) relation. What does int( somestring ) is returning really? i don;t have IDLE to test. Just run python without any args, and you'll get interactive mode. You can try things out there. This counter.py will work on a shared hosting enviroment, so absolutes paths are BIG and expected like this: /home/nikos/public_html/varsa.gr/articles/html/files/index.html That's not big. Trust me, modern databases work just fine with unique indexes like that. The most common way to organize the index is with a binary tree, so the database has to look through log(N) entries. That's like figuring out if the two numbers 142857 and 857142 are the same; you don't need to look through 1,000,000 possibilities, you just need to look through the six digits each number has. 'pin' has to be a number because if i used the column 'page' instead, just imagine the database's capacity withholding detailed information for each and every .html requested by visitors!!! Not that bad actually. I've happily used keys easily that long, and expected the database to ensure uniqueness without costing performance. So i really - really need to associate a (4-digit integer = htmlpage's absolute path) Is there any chance that you'll have more than 10,000 pages? If so, a four-digit number is *guaranteed* to have duplicates. And if you research the Birthday Paradox, you'll find that any sort of hashing algorithm is likely to produce collisions a lot sooner than that. Maybe it can be done by creating a MySQL association between the two columns, but i dont know how such a thing can be done(if it can). So, that why i need to get a unique number out of a string. please help. Ultimately, that unique number would end up being a foreign key into a table of URLs and IDs. So just skip that table and use the URLs directly - much easier. In this instance, there's no value in normalizing. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: Retrieving the full command line
On 1/22/2013 4:24 AM, Tim Golden wrote: [Python 2.7/3.3 (and hg tip) running on Windows. Not Windows-specific, though]. I use the python -mpackage incantation to run a package which has a __main__.py module and which uses relative imports internally. I'm developing under cherrypy which includes a reloader for development. The reloader attempts to rebuild the original command line by combining sys.executable and sys.argv and then does an execv. There does not appear to be any way within Python of determining the command line I used. The combination of sys.executable and sys.argv in this case will look like: c:\python33\python.exe app/__main__.py. But running this precludes the use of package-relative imports. If I understand right, the reloader should be updated to translate 'x/__main__.py' to '-m x'. Filenames of form'__x__' are reserved, in a sense, like similar identifiers in programs, and '__main__.py' should not be used for a file meant to executed directly. -- Terry Jan Reedy -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
Τη Τρίτη, 22 Ιανουαρίου 2013 4:33:03 μ.μ. UTC+2, ο χρήστης Chris Angelico έγραψε: On Wed, Jan 23, 2013 at 12:57 AM, Ferrous Cranus nikos.gr...@gmail.com wrote: Τη Τρίτη, 22 Ιανουαρίου 2013 3:04:41 μ.μ. UTC+2, ο χρήστης Steven D'Aprano έγραψε: What do you expect int(my-web-page.html) to return? Should it return 23 or 794 or 109432985462940911485 or 42? I expected a unique number from the given string to be produced so i could have a (number = string) relation. What does int( somestring ) is returning really? i don;t have IDLE to test. Just run python without any args, and you'll get interactive mode. You can try things out there. This counter.py will work on a shared hosting enviroment, so absolutes paths are BIG and expected like this: /home/nikos/public_html/varsa.gr/articles/html/files/index.html That's not big. Trust me, modern databases work just fine with unique indexes like that. The most common way to organize the index is with a binary tree, so the database has to look through log(N) entries. That's like figuring out if the two numbers 142857 and 857142 are the same; you don't need to look through 1,000,000 possibilities, you just need to look through the six digits each number has. 'pin' has to be a number because if i used the column 'page' instead, just imagine the database's capacity withholding detailed information for each and every .html requested by visitors!!! Not that bad actually. I've happily used keys easily that long, and expected the database to ensure uniqueness without costing performance. So i really - really need to associate a (4-digit integer = htmlpage's absolute path) Is there any chance that you'll have more than 10,000 pages? If so, a four-digit number is *guaranteed* to have duplicates. And if you research the Birthday Paradox, you'll find that any sort of hashing algorithm is likely to produce collisions a lot sooner than that. Maybe it can be done by creating a MySQL association between the two columns, but i dont know how such a thing can be done(if it can). So, that why i need to get a unique number out of a string. please help. Ultimately, that unique number would end up being a foreign key into a table of URLs and IDs. So just skip that table and use the URLs directly - much easier. In this instance, there's no value in normalizing. ChrisA I insist, perhaps compeleld, to use a key to associate a number to a filename. Would you help please? I dont know this is supposed to be written. i just know i need this: number = function_that_returns_a_number_out_of_a_string( absolute_path_of_a_html_file) Would someone help me write that in python coding? We are talkign 1 line of code here -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
On 01/22/2013 09:55 AM, Ferrous Cranus wrote: Τη Τρίτη, 22 Ιανουαρίου 2013 4:33:03 μ.μ. UTC+2, ο χρήστης Chris Angelico έγραψε: On Wed, Jan 23, 2013 at 12:57 AM, Ferrous Cranus nikos.gr...@gmail.com wrote: Τη Τρίτη, 22 Ιανουαρίου 2013 3:04:41 μ.μ. UTC+2, ο χρήστης Steven D'Aprano έγραψε: What do you expect int(my-web-page.html) to return? Should it return 23 or 794 or 109432985462940911485 or 42? I expected a unique number from the given string to be produced so i could have a (number = string) relation. What does int( somestring ) is returning really? i don;t have IDLE to test. Just run python without any args, and you'll get interactive mode. You can try things out there. This counter.py will work on a shared hosting enviroment, so absolutes paths are BIG and expected like this: /home/nikos/public_html/varsa.gr/articles/html/files/index.html That's not big. Trust me, modern databases work just fine with unique indexes like that. The most common way to organize the index is with a binary tree, so the database has to look through log(N) entries. That's like figuring out if the two numbers 142857 and 857142 are the same; you don't need to look through 1,000,000 possibilities, you just need to look through the six digits each number has. 'pin' has to be a number because if i used the column 'page' instead, just imagine the database's capacity withholding detailed information for each and every .html requested by visitors!!! Not that bad actually. I've happily used keys easily that long, and expected the database to ensure uniqueness without costing performance. So i really - really need to associate a (4-digit integer = htmlpage's absolute path) Is there any chance that you'll have more than 10,000 pages? If so, a four-digit number is *guaranteed* to have duplicates. And if you research the Birthday Paradox, you'll find that any sort of hashing algorithm is likely to produce collisions a lot sooner than that. Maybe it can be done by creating a MySQL association between the two columns, but i dont know how such a thing can be done(if it can). So, that why i need to get a unique number out of a string. please help. Ultimately, that unique number would end up being a foreign key into a table of URLs and IDs. So just skip that table and use the URLs directly - much easier. In this instance, there's no value in normalizing. ChrisA I insist, perhaps compeleld, to use a key to associate a number to a filename. Would you help please? I dont know this is supposed to be written. i just know i need this: number = function_that_returns_a_number_out_of_a_string( absolute_path_of_a_html_file) Would someone help me write that in python coding? We are talkign 1 line of code here I gave you every piece of that code in my last response. So you're not willing to compose the line from the clues? -- DaveA -- http://mail.python.org/mailman/listinfo/python-list
Re: Retrieving the full command line
On 22/01/2013 14:53, Terry Reedy wrote: On 1/22/2013 4:24 AM, Tim Golden wrote: [Python 2.7/3.3 (and hg tip) running on Windows. Not Windows-specific, though]. I use the python -mpackage incantation to run a package which has a __main__.py module and which uses relative imports internally. I'm developing under cherrypy which includes a reloader for development. The reloader attempts to rebuild the original command line by combining sys.executable and sys.argv and then does an execv. There does not appear to be any way within Python of determining the command line I used. The combination of sys.executable and sys.argv in this case will look like: c:\python33\python.exe app/__main__.py. But running this precludes the use of package-relative imports. If I understand right, the reloader should be updated to translate 'x/__main__.py' to '-m x'. Filenames of form'__x__' are reserved, in a sense, like similar identifiers in programs, and '__main__.py' should not be used for a file meant to executed directly. To be clear: it's Python itself, not the reloader, which is coming up with __main__.py. sys.executable is c:\python33\python.exe and sys.argv is ['c:\path\to\__main__.py'] for a program which has been started by c:\python33\python.exe -mpath\to. Obviously, there is any number of ways around this specific issue, including what you suggest: a canonical rewrite of python path\to\__main__.py into python -mpath\to. But it's not clear to me that this rewrite should be the responsibility of calling code. TJG -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
On Wed, Jan 23, 2013 at 1:55 AM, Ferrous Cranus nikos.gr...@gmail.com wrote: I insist, perhaps compeleld, to use a key to associate a number to a filename. Would you help please? I dont know this is supposed to be written. i just know i need this: number = function_that_returns_a_number_out_of_a_string( absolute_path_of_a_html_file) Would someone help me write that in python coding? We are talkign 1 line of code here def function_that_returns_a_number_out_of_a_string(string, cache=[]): return cache.index(string) if string in cache else (cache.append(string) or len(cache)-1) That will work perfectly, as long as you don't care how long the numbers end up, and as long as you have a single Python script doing the work, and as long as you make sure you save and load that cache any time you shut down the script, and so on. It will also, and rightly, be decried as a bad idea. But hey, you did specify that it be one line of code. For your real job, USE A DATABASE COLUMN. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: Sending a broadcast message using raw sockets
I just tried running you code, and the sendto call fails with Network is unreachable. That's what I expected, based on other tests I've done. That's why I was asking about how to do raw sockets, since tools like dhclient use raw sockets to do what they do. It can clearly be duplicated in Python, I just need to find some code samples on how to construct a raw packet. -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
Τη Τρίτη, 22 Ιανουαρίου 2013 5:05:49 μ.μ. UTC+2, ο χρήστης Dave Angel έγραψε: On 01/22/2013 09:55 AM, Ferrous Cranus wrote: Τη Τρίτη, 22 Ιανουαρίου 2013 4:33:03 μ.μ. UTC+2, ο χρήστης Chris Angelico έγραψε: On Wed, Jan 23, 2013 at 12:57 AM, Ferrous Cranus nikos.gr...@gmail.com wrote: Τη Τρίτη, 22 Ιανουαρίου 2013 3:04:41 μ.μ. UTC+2, ο χρήστης Steven D'Aprano έγραψε: What do you expect int(my-web-page.html) to return? Should it return 23 or 794 or 109432985462940911485 or 42? I expected a unique number from the given string to be produced so i could have a (number = string) relation. What does int( somestring ) is returning really? i don;t have IDLE to test. Just run python without any args, and you'll get interactive mode. You can try things out there. This counter.py will work on a shared hosting enviroment, so absolutes paths are BIG and expected like this: /home/nikos/public_html/varsa.gr/articles/html/files/index.html That's not big. Trust me, modern databases work just fine with unique indexes like that. The most common way to organize the index is with a binary tree, so the database has to look through log(N) entries. That's like figuring out if the two numbers 142857 and 857142 are the same; you don't need to look through 1,000,000 possibilities, you just need to look through the six digits each number has. 'pin' has to be a number because if i used the column 'page' instead, just imagine the database's capacity withholding detailed information for each and every .html requested by visitors!!! Not that bad actually. I've happily used keys easily that long, and expected the database to ensure uniqueness without costing performance. So i really - really need to associate a (4-digit integer = htmlpage's absolute path) Is there any chance that you'll have more than 10,000 pages? If so, a four-digit number is *guaranteed* to have duplicates. And if you research the Birthday Paradox, you'll find that any sort of hashing algorithm is likely to produce collisions a lot sooner than that. Maybe it can be done by creating a MySQL association between the two columns, but i dont know how such a thing can be done(if it can). So, that why i need to get a unique number out of a string. please help. Ultimately, that unique number would end up being a foreign key into a table of URLs and IDs. So just skip that table and use the URLs directly - much easier. In this instance, there's no value in normalizing. ChrisA I insist, perhaps compeleld, to use a key to associate a number to a filename. Would you help please? I dont know this is supposed to be written. i just know i need this: number = function_that_returns_a_number_out_of_a_string( absolute_path_of_a_html_file) Would someone help me write that in python coding? We are talkign 1 line of code here I gave you every piece of that code in my last response. So you're not willing to compose the line from the clues? I cannot. I don't even know yet if hashing needs to be used for what i need. The only thing i know is that: a) i only need to get a number out of string(being an absolute path) b) That number needs to be unique, because that number is an indicator to the actual html file. Would you help me write this in python? Why the hell pin = int ( '/home/nikos/public_html/index.html' ) fails? because it has slashes in it? -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
On Wed, Jan 23, 2013 at 2:21 AM, Ferrous Cranus nikos.gr...@gmail.com wrote: Why the hell pin = int ( '/home/nikos/public_html/index.html' ) fails? because it has slashes in it? What do you expect it to return? 141592653589793? Go through the Python tutorial. Better yet, find a book that distinguishes between technology and magic, and sets out clearly what each one's field is. Then go here, and read. http://www.catb.org/esr/faqs/smart-questions.html Then go back to your project. Have another shot at things. Put your new-found knowledge and understanding to work. You'll be far better able to figure things out, and better able to understand what we've all been saying. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
Ferrous Cranus wrote:
I insist, perhaps compeleld, to use a key to associate a number to a
filename. Would you help please?
I dont know this is supposed to be written. i just know i need this:
number = function_that_returns_a_number_out_of_a_string(
absolute_path_of_a_html_file)
Would someone help me write that in python coding? We are talkign 1 line
of code here
Since you insist:
def
function_that_returns_a_number_out_of_a_string(absolute_path_of_a_html_file):
... return int(absolute_path_of_a_html_file.encode(hex), 16)
...
function_that_returns_a_number_out_of_a_string(/foo/bar/baz)
14669632128886499728813089146L
As a bonus here is how to turn the number back into a path:
x = 14669632128886499728813089146
{:x}.format(x).decode(hex)
'/foo/bar/baz'
;)
--
http://mail.python.org/mailman/listinfo/python-list
Re: Else statement executing when it shouldnt
On Mon, 21 Jan 2013 06:07:08 +0100
René Klačan rene.kla...@gmail.com wrote:
Examples:
# else branch will be executed
i = 0
while i 5:
i += 1
else:
print('loop is over')
# else branch will be executed
i = 0
while i 5:
i += 1
if i == 7:
print('i == 7')
break
else:
print('loop is over')
# else branch wont be executed
i = 0
while i 5:
i += 1
if i == 3:
print('i == 3')
break
else:
print('loop is over')
Huh?! I would have expected all your examples to raise a SyntaxError or
IndentationError. Why don't they? Is 'else' not required to have a
matching 'if'?
--
http://mail.python.org/mailman/listinfo/python-list
Re: Else statement executing when it shouldnt
On Wed, Jan 23, 2013 at 2:39 AM, Thomas Boell tboell@domain.invalid wrote: Huh?! I would have expected all your examples to raise a SyntaxError or IndentationError. Why don't they? Is 'else' not required to have a matching 'if'? Other things can have else, including 'for' and 'while' loops. :) ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
Thank you but the number needs to be a 4-digit integer only, if its to be stored in the database table correctly. pin = int( htmlpage.encode(hex), 16 ) I just tried whayt you gace me This produces a number of: 140530319499494727...677522822126923116L Visit http://superhost.gr to see that displayed error. I think it Why did you use hex for? to encode the string to hexarithmetic? what for? -- http://mail.python.org/mailman/listinfo/python-list
Re: Else statement executing when it shouldnt
Thomas Boell tboell@domain.invalid wrote: Huh?! I would have expected all your examples to raise a SyntaxError or IndentationError. Why don't they? Is 'else' not required to have a matching 'if'? Matching 'if' or 'for' or 'while'. See http://docs.python.org/2/tutorial/controlflow.html#break-and-continue-statements-and-else-clauses-on-loops -- Duncan Booth http://kupuguy.blogspot.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Else statement executing when it shouldnt
Duncan Booth duncan.booth@invalid.invalid wrote: Matching 'if' or 'for' or 'while'. or of course 'try'. -- Duncan Booth http://kupuguy.blogspot.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Else statement executing when it shouldnt
On Wed, 23 Jan 2013 02:42:27 +1100 Chris Angelico ros...@gmail.com wrote: On Wed, Jan 23, 2013 at 2:39 AM, Thomas Boell tboell@domain.invalid wrote: Huh?! I would have expected all your examples to raise a SyntaxError or IndentationError. Why don't they? Is 'else' not required to have a matching 'if'? Other things can have else, including 'for' and 'while' loops. :) I must say, that's bound to be confusing for anyone who knows any language other than Python (or none, even). Syntax like that is an accident waiting to happen... -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
Τη Τρίτη, 22 Ιανουαρίου 2013 5:25:42 μ.μ. UTC+2, ο χρήστης Peter Otten έγραψε:
Ferrous Cranus wrote:
I insist, perhaps compeleld, to use a key to associate a number to a
filename. Would you help please?
I dont know this is supposed to be written. i just know i need this:
number = function_that_returns_a_number_out_of_a_string(
absolute_path_of_a_html_file)
Would someone help me write that in python coding? We are talkign 1 line
of code here
Since you insist:
def
function_that_returns_a_number_out_of_a_string(absolute_path_of_a_html_file):
... return int(absolute_path_of_a_html_file.encode(hex), 16)
...
function_that_returns_a_number_out_of_a_string(/foo/bar/baz)
14669632128886499728813089146L
As a bonus here is how to turn the number back into a path:
x = 14669632128886499728813089146
{:x}.format(x).decode(hex)
'/foo/bar/baz'
;)
Thank you but no...no that would be unnecessary complex.
I just need a way to CONVERT a string(absolute path) to a 4-digit unique number
with INT!!! That's all i want!! But i cannot make it work :(
--
http://mail.python.org/mailman/listinfo/python-list
Re: Else statement executing when it shouldnt
On Wed, Jan 23, 2013 at 2:48 AM, Thomas Boell tboell@domain.invalid wrote: On Wed, 23 Jan 2013 02:42:27 +1100 Chris Angelico ros...@gmail.com wrote: On Wed, Jan 23, 2013 at 2:39 AM, Thomas Boell tboell@domain.invalid wrote: Huh?! I would have expected all your examples to raise a SyntaxError or IndentationError. Why don't they? Is 'else' not required to have a matching 'if'? Other things can have else, including 'for' and 'while' loops. :) I must say, that's bound to be confusing for anyone who knows any language other than Python (or none, even). Syntax like that is an accident waiting to happen... It can be confusing and does take that bit of learning, but it's SO handy. In C code, I sometimes simulate it with a 'goto' and a comment, but the actual keyword is much clearer. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
On Wed, Jan 23, 2013 at 2:59 AM, Ferrous Cranus nikos.gr...@gmail.com wrote: I just need a way to CONVERT a string(absolute path) to a 4-digit unique number with INT!!! That's all i want!! But i cannot make it work :( Either you are deliberately trolling, or you have a major comprehension problem. Please go back and read, carefully, all the remarks you've been offered in this thread. Feel free to ask for clarification of anything that doesn't make sense, but be sure to read all of it. You are asking something that is fundamentally impossible[1]. There simply are not enough numbers to go around. ChrisA [1] Well, impossible in decimal. If you work in base 4294967296, you could do what you want in four digits. -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
On 01/22/2013 10:46 AM, Ferrous Cranus wrote: Thank you but the number needs to be a 4-digit integer only, if its to be stored in the database table correctly. pin = int( htmlpage.encode(hex), 16 ) I just tried whayt you gace me This produces a number of: 140530319499494727...677522822126923116L Visit http://superhost.gr to see that displayed error. I think it Why did you use hex for? to encode the string to hexarithmetic? what for? There are plenty of people (but not me) giving you database advice, but you don't want it. Apparently you do have web access, so why aren't you looking up the functions that don't behave the way you think they should? This page has the built-in functions: http://docs.python.org/2/library/functions.html To get quickly to a particular function, follow the link from the function name at the top of that page. int(x=0) int(x, base=10) Convert a number or string x to an integer, or return 0 if no arguments are given. If x is a number, it can be a plain integer, a long integer, or a floating point number. If x is floating point, the conversion truncates towards zero. If the argument is outside the integer range, the function returns a long object instead. If x is not a number or if base is given, then x must be a string or Unicode object representing an integer literal in radix base. Optionally, the literal can be preceded by + or - (with no space in between) and surrounded by whitespace. A base-n literal consists of the digits 0 to n-1, with a to z (or A to Z) having values 10 to 35. The default base is 10. The allowed values are 0 and 2-36. Base-2, -8, and -16 literals can be optionally prefixed with 0b/0B, 0o/0O/0, or 0x/0X, as with integer literals in code. Base 0 means to interpret the string exactly as an integer literal, so that the actual base is 2, 8, 10, or 16. The integer type is described in Numeric Types — int, float, long, complex. Are there words in there which are unclear? A filename is a string, but it doesn't represent an integer literal in any base, and especially not in base 10. -- DaveA -- http://mail.python.org/mailman/listinfo/python-list
Converting a string to a number by using INT (no hash method)
I just need a way to CONVERT a string(absolute path) to a 4-digit unique number with INT!!! That's all i want!! But i cannot make it work :( And the best part is that that number must be able to turn back into a path. This way i DON'T EVEN HAVE TO STORE THE ACTUAL HTML PAGE'S ABSOLUTE PATH 1. User requests a specific html page( .htaccess gives my script the absolute path for that .html page) 2. I turn the path into a 4-digitnumber 3. i store that number to the database. I DONT EVEN HAVE TO STORE THE PATH TO THE DATABASE ANYMORE!!! this is just great! -- http://mail.python.org/mailman/listinfo/python-list
RE: Using filepath method to identify an .html page
Thank you but the number needs to be a 4-digit integer only, if its to be stored in the database table correctly. Okay, I think we need to throw the flag on the field at this point. What you're asking for has gone into a realm where you clearly don't even appear to understand what you're asking for. What is the reason for your integer being limited to only 4 digits? Not even databases are limited in such a way. So what are you doing that imposes that kind of a limit, and why? -- http://mail.python.org/mailman/listinfo/python-list
RE: Converting a string to a number by using INT (no hash method)
I just need a way to CONVERT a string(absolute path) to a 4-digit unique number with INT!!! That's all i want!! But i cannot make it work :( And the best part is that that number must be able to turn back into a path. This way i DON'T EVEN HAVE TO STORE THE ACTUAL HTML PAGE'S ABSOLUTE PATH 1. User requests a specific html page( .htaccess gives my script the absolute path for that .html page) 2. I turn the path into a 4-digitnumber 3. i store that number to the database. I DONT EVEN HAVE TO STORE THE PATH TO THE DATABASE ANYMORE!!! this is just great! Without involving some kind of lookup table/map service to store the paths (which would entirely defeat the purpose) what you are ranting about is technically impossible. If you tried really really hard you *might* be able to convert a string that long into some kind of 4-digit integer checksum, but you would *never* be able to convert that back into a file path. Nor would it be guaranteed to be unique. -- http://mail.python.org/mailman/listinfo/python-list
Re: Converting a string to a number by using INT (no hash method)
On 22/01/2013 16:15, Ferrous Cranus wrote: I just need a way to CONVERT a string(absolute path) to a 4-digit unique number with INT!!! That's all i want!! But i cannot make it work :( And the best part is that that number must be able to turn back into a path. This way i DON'T EVEN HAVE TO STORE THE ACTUAL HTML PAGE'S ABSOLUTE PATH 1. User requests a specific html page( .htaccess gives my script the absolute path for that .html page) 2. I turn the path into a 4-digitnumber 3. i store that number to the database. I DONT EVEN HAVE TO STORE THE PATH TO THE DATABASE ANYMORE!!! this is just great! Hi Iron Skull, I hereby nominate you for Troll of the Millenium. -- Cheers. Mark Lawrence -- http://mail.python.org/mailman/listinfo/python-list
Re: Uniquely identifying each every html template
In 5dd4babd-716d-4542-ad36-e6a841b73...@googlegroups.com Ferrous Cranus nikos.gr...@gmail.com writes: If that's the case, then I figure you have about 3 choices: 1) use the file path as your key, instead of requiring a number No, i cannot, because it would mess things at a later time on when i for example: 1. mv name.html othername.html (document's filename altered) 2. mv name.html /subfolder/name.html (document's filepath altered) Will the file always reside on the same device? If so, perhaps you could use the file inode number as the key. (That seems fairly brittle though. For example if the disk crashes and is restored from a backup, the inodes could easily be different.) -- John Gordon A is for Amy, who fell down the stairs gor...@panix.com B is for Basil, assaulted by bears -- Edward Gorey, The Gashlycrumb Tinies -- http://mail.python.org/mailman/listinfo/python-list
Re: Converting a string to a number by using INT (no hash method)
On 01/22/2013 11:15 AM, Ferrous Cranus wrote: I just need a way to CONVERT a string(absolute path) to a 4-digit unique number with INT!!! That's all i want!! But i cannot make it work :( And the best part is that that number must be able to turn back into a path. This way i DON'T EVEN HAVE TO STORE THE ACTUAL HTML PAGE'S ABSOLUTE PATH 1. User requests a specific html page( .htaccess gives my script the absolute path for that .html page) 2. I turn the path into a 4-digitnumber 3. i store that number to the database. I DONT EVEN HAVE TO STORE THE PATH TO THE DATABASE ANYMORE!!! this is just great! I had prepared a detailed response, showing what your choices are with this new constraint. But I can see from this post here that there's no point, so I've thrown it out. Either you're trolling, or you have a very limited knowledge of mathematics. This isn't a programming problem, it's a simple problem of information theory. Unless you constrain your users to very restrictive filenames, what you ask here simply cannot be done. Perpetual motion machine, anyone? Or a compression algorithm which can be applied repeatedly to a chunk of data until it shrinks down to one byte? No way to do it without cheating, and the literature is full of examples of people cheating. -- DaveA -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
In mailman.801.1358870401.2939.python-l...@python.org Ferrous Cranus nikos.gr...@gmail.com writes: I just need a way to CONVERT a string(absolute path) to a 4-digit unique number with INT!!! That's all i want!! But i cannot make it work :( Given your requirements, I don't think it *can* work. There's just no way to do it. How can the computer guarantee that billions of possible inputs (file paths) map to 10,000 unique outputs (4-digit numbers)? It's not possible. It might be possible if you had control over the format of the input strings, but it doesn't sound like you do. Can you maintain a separate database which maps file paths to numbers? If so, then this is an easy problem. Just keep a lookup table, like so: filepath number -- /home/files/bob/foo.html 0001 /home/files/bob/bar.html 0002 /home/files/steve/recipes/chocolate-cake.html0003 /home/files/mary/payroll.html0004 -- John Gordon A is for Amy, who fell down the stairs gor...@panix.com B is for Basil, assaulted by bears -- Edward Gorey, The Gashlycrumb Tinies -- http://mail.python.org/mailman/listinfo/python-list
Re: Sending a broadcast message using raw sockets
If you don't *have* to use the actual socket library, you might want to have a look at scapy. It's a packet manipulation program/library. It might make things a little easier. http://www.secdev.org/projects/scapy/ On Jan 22, 2013 9:17 AM, Peter Steele pwste...@gmail.com wrote: I just tried running you code, and the sendto call fails with Network is unreachable. That's what I expected, based on other tests I've done. That's why I was asking about how to do raw sockets, since tools like dhclient use raw sockets to do what they do. It can clearly be duplicated in Python, I just need to find some code samples on how to construct a raw packet. -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: Converting a string to a number by using INT (no hash method)
Τη Τρίτη, 22 Ιανουαρίου 2013 6:27:32 μ.μ. UTC+2, ο χρήστης Leonard, Arah έγραψε: I just need a way to CONVERT a string(absolute path) to a 4-digit unique number with INT!!! That's all i want!! But i cannot make it work :( And the best part is that that number must be able to turn back into a path. This way i DON'T EVEN HAVE TO STORE THE ACTUAL HTML PAGE'S ABSOLUTE PATH 1. User requests a specific html page( .htaccess gives my script the absolute path for that .html page) 2. I turn the path into a 4-digitnumber 3. i store that number to the database. I DONT EVEN HAVE TO STORE THE PATH TO THE DATABASE ANYMORE!!! this is just great! Without involving some kind of lookup table/map service to store the paths (which would entirely defeat the purpose) what you are ranting about is technically impossible. If you tried really really hard you *might* be able to convert a string that long into some kind of 4-digit integer checksum, but you would *never* be able to convert that back into a file path. Nor would it be guaranteed to be unique. Now that iam thinking of it more and more, i don't have to turn the 'path' back to a 'number' So, what i want is a function foo() that does this: foo( some long string ) -- 1234 = 1. User requests a specific html page( .htaccess gives my script the absolute path for that .html page) 2. turn the 'path' to 4-digit number and save it as 'pin' (how?) 3. i store that number to the database. I DONT EVEN HAVE TO STORE THE HTML PAGE'S PATH TO THE DATABASE ANYMORE!!! this is just great! At some later time i want to check the weblog of that .html page 1. request the page as: http://mydomain.gr/index.html?show=log 2. .htaccess gives my script the absolute path of the requested .html file 3. turn the 'path' to 4-digit number and save it as 'pin' (this is what i'am asking) 4. select all log records for that specific .html page (based on the 'pin' column) Since i have the requested 'path' which has been converted to a database stored 4-digit number, i'am aware for which page i'am requesting detailed data from, so i look upon the 'pin' column in the database and thus i know which records i want to select. No need, to turn the number back to a path anymore, just the path to a number, to identify the specific .html page Can this be done? -- http://mail.python.org/mailman/listinfo/python-list
Re: Converting a string to a number by using INT (no hash method)
On Tue, 22 Jan 2013 16:27:32 + Leonard, Arah arah.leon...@bruker-axs.com wrote: I just need a way to CONVERT a string(absolute path) to a 4-digit unique number with INT!!! That's all i want!! But i cannot make it work :( Why bother? Just wish for a zillion dollars and then you never have to program again. At least that would be theoretically possible. *might* be able to convert a string that long into some kind of 4-digit integer checksum, but you would *never* be able to convert that back into a file path. Nor would it be guaranteed to be unique. In fact, if you have 10,001 files it is absolutely guaranteed to have at least one duplicate entry. -- D'Arcy J.M. Cain da...@druid.net | Democracy is three wolves http://www.druid.net/darcy/| and a sheep voting on +1 416 425 1212 (DoD#0082)(eNTP) | what's for dinner. IM: da...@vex.net -- http://mail.python.org/mailman/listinfo/python-list
Is PyArg_ParseTuple necessary to parse arguments?
Or can I just loop through the argument tuple manually by using something like PyTuple_GET_ITEM(args,i), then putting manual code to convert the objects to appropriate C type? The use case is that I am interfacing Python with another interpreter and do not know the type and number of arguments till runtime :) rahul -- http://mail.python.org/mailman/listinfo/python-list
RE: Converting a string to a number by using INT (no hash method)
No need, to turn the number back to a path anymore, just the path to a number, to identify the specific .html page Can this be done? Guaranteed to be unique? Not even remotely possible. Even with a lookup table approach (which defeats your purpose of not storing the path) with 4 digits you're looking at a maximum 1 unique file paths before your system duplicates numbers. And that's the best-case scenario. Anything else would be worse. Not guaranteed to be unique? Easy. Just take then previously given example of pin = int( htmlpage.encode(hex), 16 ) and mod it to your limit, to make: pin = int( htmlpage.encode(hex), 16 ) % 1 It'll give you your number, but there are no guarantees of uniqueness. You're looking at more blind random luck using that. -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
On Jan 22, 8:59 pm, Ferrous Cranus nikos.gr...@gmail.com wrote: I just need a way to CONVERT a string(absolute path) to a 4-digit unique number with INT!!! That's all i want!! But i cannot make it work :( I just need a way to eat my soup with a screwdriver. No I WONT use a spoon. Im starving HELP -- http://mail.python.org/mailman/listinfo/python-list
Re: Converting a string to a number by using INT (no hash method)
Τη Τρίτη, 22 Ιανουαρίου 2013 7:24:26 μ.μ. UTC+2, ο χρήστης Leonard, Arah έγραψε: No need, to turn the number back to a path anymore, just the path to a number, to identify the specific .html page Can this be done? Guaranteed to be unique? Not even remotely possible. Even with a lookup table approach (which defeats your purpose of not storing the path) with 4 digits you're looking at a maximum 1 unique file paths before your system duplicates numbers. And that's the best-case scenario. Anything else would be worse. Not guaranteed to be unique? Easy. Just take then previously given example of pin = int( htmlpage.encode(hex), 16 ) and mod it to your limit, to make: pin = int( htmlpage.encode(hex), 16 ) % 1 It'll give you your number, but there are no guarantees of uniqueness. You're looking at more blind random luck using that. Finally!! THANK YOU VERY MUCH!!! THIS IS WHAT I WAS LOOKING FOR!!! NOW, if you please explain it to me from the innermost parenthesis please, because i do want to understand it!!! And since i'am sure it works, and i just used it on http://superhost.gr please view my domain and help me understand why its producing errors for me. Your 1-line code surely works but somethings not letting my webpage load normally. Please take a look -- http://mail.python.org/mailman/listinfo/python-list
Understanding while...else...
Several people have trouble understanding Python's while-else and
for-else constructs. It is actually quite simple if one starts with
if-else, which few have any trouble with.
Start with, for example
if n 0:
n -= 1
else:
n = None
The else clause is executed if and when the condition is false. (That
the code is useless is not the point here.) Now use pseudo-Python label
and goto statements to repeatedly decrement n
label: check
if n 0:
n -= 1
goto: check
else:
n = None
The else clause is executed if and when the condition is false. (I am
aware that the above will always set n to None if it terminates normally
and that something more is needed to do anything useful, but this is not
the point here.) Now use a real Python while statement to do the *same
thing*.
while n 0:
n -= 1
else:
n = None
The else clause is executed if and when the condition is false. This is
the same as with the non-problematical if statement! To see that the
pseudo-Python is the 'correct' expansion, we can look at the
disassembled CPython byte code.
from dis import dis
dis('if n 0: n -= 1\nelse: n = None')
dis('while n 0: n -= 1\nelse: n = None')
produces
1 0 LOAD_NAME0 (n)
3 LOAD_CONST 0 (0)
6 COMPARE_OP 4 ()
9 POP_JUMP_IF_FALSE 25
12 LOAD_NAME0 (n)
15 LOAD_CONST 1 (1)
18 INPLACE_SUBTRACT
19 STORE_NAME 0 (n)
22 JUMP_FORWARD 6 (to 31)
225 LOAD_CONST 2 (None)
28 STORE_NAME 0 (n)
31 LOAD_CONST 2 (None)
34 RETURN_VALUE
1 0 SETUP_LOOP 32 (to 35)
3 LOAD_NAME0 (n)
6 LOAD_CONST 0 (0)
9 COMPARE_OP 4 ()
12 POP_JUMP_IF_FALSE 28
15 LOAD_NAME0 (n)
18 LOAD_CONST 1 (1)
21 INPLACE_SUBTRACT
22 STORE_NAME 0 (n)
25 JUMP_ABSOLUTE3
28 POP_BLOCK
2 29 LOAD_CONST 2 (None)
32 STORE_NAME 0 (n)
35 LOAD_CONST 2 (None)
38 RETURN_VALUE
The while loop code adds SETUP_LOOP to set up the context to handle
continue and break statements. It also add POP_BLOCK after the while
block. I presume this disables the loop context. Most importantly for
this discussion, JUMP_FORWARD (past the else block), which is implicit
in if-else statements, changes to JUMP_ABSOLUTE (to the condition test),
which is implicit in while statements and explicit in the pseudo-Python
expansion. Everything else is the same -- in particular the
POP_JUMP_IF_FALSE, after the condition test, which in both cases jumps
to the else block. So in both statements, the else block is executed if
and when the condition is false.
As for for-else statements, a for loop is basically a specialized while
loop plus assignment. The implicit while condition is that the iterable
has another item to process. So the else clause executes if and when
that condition is false, when iter(iterable) is exhausted.
--
Terry Jan Reedy
--
http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
On 22/01/2013 17:33, rusi wrote: On Jan 22, 8:59 pm, Ferrous Cranus nikos.gr...@gmail.com wrote: I just need a way to CONVERT a string(absolute path) to a 4-digit unique number with INT!!! That's all i want!! But i cannot make it work :( I just need a way to eat my soup with a screwdriver. No I WONT use a spoon. Im starving HELP Unfortunately a spoon wouldn't help in this case as the soup is being served in a basket. However I still absolutely insist that a Python solution to this problem is found. -- Cheers. Mark Lawrence -- http://mail.python.org/mailman/listinfo/python-list
Re: Sending a broadcast message using raw sockets
In fact, I have used scapy in the past, but I am working in a restricted environment and don't have this package available. It provides tones more than I really need anyway, and I figured a simple raw socket send/receive can't be *that* hard. I may have to reverse engineer some C code, such as dhclient... On Tuesday, January 22, 2013 8:07:12 AM UTC-8, Corey LeBleu wrote: If you don't *have* to use the actual socket library, you might want to have a look at scapy. It's a packet manipulation program/library. It might make things a little easier. http://www.secdev.org/projects/scapy/ On Jan 22, 2013 9:17 AM, Peter Steele pwst...@gmail.com wrote: I just tried running you code, and the sendto call fails with Network is unreachable. That's what I expected, based on other tests I've done. That's why I was asking about how to do raw sockets, since tools like dhclient use raw sockets to do what they do. It can clearly be duplicated in Python, I just need to find some code samples on how to construct a raw packet. -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
Τη Τρίτη, 22 Ιανουαρίου 2013 6:55:02 μ.μ. UTC+2, ο χρήστης John Gordon έγραψε:
In mailman.801.1358870401.2939.python-l...@python.org Ferrous Cranus
nikos.gr...@gmail.com writes:
I just need a way to CONVERT a string(absolute path) to a 4-digit unique
number with INT!!! That's all i want!! But i cannot make it work :(
Given your requirements, I don't think it *can* work. There's just no
way to do it.
How can the computer guarantee that billions of possible inputs (file paths)
map to 10,000 unique outputs (4-digit numbers)? It's not possible.
It might be possible if you had control over the format of the input strings,
but it doesn't sound like you do.
Can you maintain a separate database which maps file paths to numbers?
If so, then this is an easy problem. Just keep a lookup table, like so:
filepath number
--
/home/files/bob/foo.html 0001
/home/files/bob/bar.html 0002
/home/files/steve/recipes/chocolate-cake.html0003
/home/files/mary/payroll.html0004
--
John Gordon A is for Amy, who fell down the stairs
gor...@panix.com B is for Basil, assaulted by bears
-- Edward Gorey, The Gashlycrumb Tinies
No, because i DO NOT WANT to store LOTS OF BIGS absolute paths in the database.
And the .html files are not even close 10.000
--
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Re: Using filepath method to identify an .html page
Τη Τρίτη, 22 Ιανουαρίου 2013 6:23:16 μ.μ. UTC+2, ο χρήστης Leonard, Arah έγραψε: Thank you but the number needs to be a 4-digit integer only, if its to be stored in the database table correctly. Okay, I think we need to throw the flag on the field at this point. What you're asking for has gone into a realm where you clearly don't even appear to understand what you're asking for. What is the reason for your integer being limited to only 4 digits? Not even databases are limited in such a way. So what are you doing that imposes that kind of a limit, and why? a) I'am a reseller, i have unlimited ftp quota, hence database space b) I'am feeling compelled to do it this way c) i DO NOT want to use BIG absolute paths to identify files, just small numbers , shich they are easier to maintain. Your solution i know it works and i thank you very much for providing it to me! Can you help please on the errors that http://superhost.gr gives? -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
On 01/22/2013 03:07 AM, Ferrous Cranus wrote: Now, can you pleas help me write the switch to filepath identifier? I'am having trouble writing it. Unfortunately this isn't the way to go either. Apache uses its own config and rules to map a url to a filepath. There's no way for Python to do this without interrogating Apache. And it's not necessary anyway. Urls to paths are mapped in a fairly static way by Apache. Just put your files in the right folders and generate the appropriate urls. It's not hard. You're struggling because you either don't understand how apache works, or you're trying to work against it. I've been deploying web sites for years and I've never had to do any of the things you are trying to make Python do. -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
Τη Τρίτη, 22 Ιανουαρίου 2013 7:33:00 μ.μ. UTC+2, ο χρήστης rusi έγραψε: On Jan 22, 8:59 pm, Ferrous Cranus nikos.gr...@gmail.com wrote: I just need a way to CONVERT a string(absolute path) to a 4-digit unique number with INT!!! That's all i want!! But i cannot make it work :( I just need a way to eat my soup with a screwdriver. No I WONT use a spoon. Im starving HELP That was funny! -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
Τη Τρίτη, 22 Ιανουαρίου 2013 6:11:20 μ.μ. UTC+2, ο χρήστης Chris Angelico
έγραψε:
On Wed, Jan 23, 2013 at 2:59 AM, Ferrous Cranus nikos.gr...@gmail.com wrote:
I just need a way to CONVERT a string(absolute path) to a 4-digit unique
number with INT!!! That's all i want!! But i cannot make it work :(
Either you are deliberately trolling, or you have a major
comprehension problem. Please go back and read, carefully, all the
remarks you've been offered in this thread. Feel free to ask for
clarification of anything that doesn't make sense, but be sure to read
all of it. You are asking something that is fundamentally
impossible[1]. There simply are not enough numbers to go around.
ChrisA
[1] Well, impossible in decimal. If you work in base 4294967296, you
could do what you want in four digits.
Fundamentally impossible?
Well
OK: How about this in Perl:
$ cat testMD5.pl
use strict;
foreach my $url(qw@ /index.html /about/time.html @){
hashit($url);
}
sub hashit {
my $url=shift;
my @ltrs=split(//,$url);
my $hash = 0;
foreach my $ltr(@ltrs){
$hash = ( $hash + ord($ltr)) %1;
}
printf %s: %0.4d\n,$url,$hash
}
which yields:
$ perl testMD5.pl
/index.html: 1066
/about/time.html: 1547
--
http://mail.python.org/mailman/listinfo/python-list
Re: Converting a string to a number by using INT (no hash method)
Τη Τρίτη, 22 Ιανουαρίου 2013 7:24:26 μ.μ. UTC+2, ο χρήστης Leonard, Arah έγραψε:
No need, to turn the number back to a path anymore, just the path to a
number, to identify the specific .html page
Can this be done?
Guaranteed to be unique? Not even remotely possible. Even with a lookup
table approach (which defeats your purpose of not storing the path) with 4
digits you're looking at a maximum 1 unique file paths before your system
duplicates numbers. And that's the best-case scenario. Anything else would
be worse.
Not guaranteed to be unique? Easy. Just take then previously given example
of pin = int( htmlpage.encode(hex), 16 ) and mod it to your limit, to make:
pin = int( htmlpage.encode(hex), 16 ) % 1
It'll give you your number, but there are no guarantees of uniqueness.
You're looking at more blind random luck using that.
==
pin = int( htmlpage.encode(hex), 16 ) % 1
==
Can you please explain the differences to what you have posted opposed to this
perl coding?
==
foreach my $ltr(@ltrs){
$hash = ( $hash + ord($ltr)) %1;
==
I want to understand this and see it implemented in Python.
--
http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
I'm sorry you are getting so frustrated. There's obviously a language
barrier here, but also your frustration is preventing you from thinking
clearly. You need to take a step back, breath, and re-read everything
that's been written to you on this thread. All your questions that can
be answered have been answered. If you are being paid to develop this,
then we don't want to do your work for you since we're not the ones
being paid. If you're doing this for a class assignment, then again we
don't want to do it for you because that would defeat the purpose of
your education. But if you're willing to learn, then I think the others
have said on this thread will help you learn it.
You can't learn Python by developing CGI scripts and running them on the
server. You need to try out snippets of code in an interactive way.
You've been told how to do this, and you don't need IDLE. Although
nothing prevents you from installing IDLE on your local machine. I hope
you have the python interpreter on your local workstation. If not,
download it and install it. You will need it. Use the python standard
library reference online (or download it). You will need it.
On 01/22/2013 08:21 AM, Ferrous Cranus wrote:
Why the hell
pin = int ( '/home/nikos/public_html/index.html' )
fails? because it has slashes in it?
That line fails because the string you passed it simply cannot be parsed
into a number. Just for simplicity's sake here, suppose we define a
number as any number of digits, 0-9, followed by a '.' or a ','
depending on locale, and some more digits, 0-9. This is very simplistic
but it will server our purpose for this example. So given that a number
is defined as above, we expect that we can parse the following strings:
int('123.433') == int(123.433) == 123
but '/home/nikos/public_html/index.html' contains nothing that is
recognizable as a number. There are no 0-9 digits in it, no periods or
commas. So rather than returning 0, which would be absolutely
incorrect, int() throws an exception because you've passed it a string
which does not contain a recognizable number.
If you really want to get a number to identify a string you'll have to
create a hash of some kind. You were on the right track with hashlib.
Except that int() again cannot work with the hash object because nothing
in the hash object's string representation looks like a number. If you
would follow the link you've already been given on the documentation for
hashlib you'd find that the object returned by md5 has methods you can
call to give you the hash in different forms, including a large number.
--
http://mail.python.org/mailman/listinfo/python-list
Re: Converting a string to a number by using INT (no hash method)
In 592233bd-3fc1-4e13-97f8-e11f89fbb...@googlegroups.com Ferrous Cranus nikos.gr...@gmail.com writes: pin int( htmlpage.encode(hex), 16 ) % 1 It'll give you your number, but there are no guarantees of uniqueness. You're looking at more blind random luck using that. Finally!! THANK YOU VERY MUCH!!! THIS IS WHAT I WAS LOOKING FOR!!! No it isn't; you said you wanted a unique 4-digit number. This method can return the same 4-digit number for lots of different file paths. NOW, if you please explain it to me from the innermost parenthesis please, because i do want to understand it!!! 1. Transform the html path string into a (large) hexadecimal number using the encode() function. 2. Convert the hexadecimal number into a decimal integer using the int() function. 3. Shrink the integer into the range 0- by using the % operator. -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
In 4847a0e3-aefa-4330-9252-db08f2e99...@googlegroups.com Ferrous Cranus nikos.gr...@gmail.com writes: And the .html files are not even close 10.000 You said you wanted a 4-digit number. There are 10,000 different 4-digit numbers. 0001 0002 ... -- John Gordon A is for Amy, who fell down the stairs gor...@panix.com B is for Basil, assaulted by bears -- Edward Gorey, The Gashlycrumb Tinies -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
On 2013-01-22 18:26, Ferrous Cranus wrote:
Τη Τρίτη, 22 Ιανουαρίου 2013 6:11:20 μ.μ. UTC+2, ο χρήστης Chris Angelico
έγραψε:
On Wed, Jan 23, 2013 at 2:59 AM, Ferrous Cranus nikos.gr...@gmail.com wrote:
I just need a way to CONVERT a string(absolute path) to a 4-digit unique
number with INT!!! That's all i want!! But i cannot make it work :(
Either you are deliberately trolling, or you have a major
comprehension problem. Please go back and read, carefully, all the
remarks you've been offered in this thread. Feel free to ask for
clarification of anything that doesn't make sense, but be sure to read
all of it. You are asking something that is fundamentally
impossible[1]. There simply are not enough numbers to go around.
ChrisA
[1] Well, impossible in decimal. If you work in base 4294967296, you
could do what you want in four digits.
Fundamentally impossible?
Yes.
Well
OK: How about this in Perl:
$ cat testMD5.pl
use strict;
foreach my $url(qw@ /index.html /about/time.html @){
hashit($url);
}
sub hashit {
my $url=shift;
my @ltrs=split(//,$url);
my $hash = 0;
foreach my $ltr(@ltrs){
$hash = ( $hash + ord($ltr)) %1;
}
printf %s: %0.4d\n,$url,$hash
}
which yields:
$ perl testMD5.pl
/index.html: 1066
/about/time.html: 1547
That shortens the int to 4 digits.
A hash isn't guaranteed to be unique. A hash is an attempt to make an
int which is highly sensitive to a change in the data so that a small
change in the data will result in a different int. If the change is big
enough it _could_ give the same int, but the hope is that it probably
won't. (Ideally, if the hash has 4 decimal digits, you'd hope that the
chance of different data giving the same hash would be about 1 in
1.)
--
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Re: Using filepath method to identify an .html page
On 01/22/2013 11:13 AM, Ferrous Cranus wrote: a) I'am a reseller, i have unlimited ftp quota, hence database space Space doesn't even come into the equation. There's virtually no difference between a 4-digit number and a 100-character string. Yes there is an absolute difference in storage space, but the difference is so miniscule that there's no point even thinking about it. Especially if you are dealing with less than a million database rows. b) I'am feeling compelled to do it this way Why? Who's compelling you? Your boss? c) i DO NOT want to use BIG absolute paths to identify files, just small numbers , shich they are easier to maintain. No it won't be easier to maintain. I've done my share of web development over the years. There's no difference between using a string index and some form of number index. And if you have to go over the database by hand, having a string is infinitely easier for your brain to comprehend than a magic number. Now don't get me wrong. I've done plenty of tables linked by index numbers, but it's certainly harder to fix the data by hand since an index number only has meaning in the context of a query with another table. Your solution i know it works and i thank you very much for providing it to me! Can you help please on the errors that http://superhost.gr gives? Sorry I cannot, since I don't have access to your site's source code, or your database. -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
On 01/22/2013 11:26 AM, Ferrous Cranus wrote: which yields: $ perl testMD5.pl /index.html: 1066 /about/time.html: 1547 Well do it the same with in python then. Just read the docs on the hashlib so you know what kind of object it returns and how to call methods on that object to return a big number that you can then do % 1 on it. Note that your perl code is guaranteed to have collisions in the final number generated. If you're comfortable with perl, maybe you should use it rather than fight a language that you are not comfortable with and not understanding. -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
On 01/22/2013 01:26 PM, Ferrous Cranus wrote:
snip
sub hashit {
my $url=shift;
my @ltrs=split(//,$url);
my $hash = 0;
foreach my $ltr(@ltrs){
$hash = ( $hash + ord($ltr)) %1;
}
printf %s: %0.4d\n,$url,$hash
}
which yields:
$ perl testMD5.pl
/index.html: 1066
/about/time.html: 1547
If you use that algorithm to get a 4 digit number, it'll look good for
the first few files. But if you try 100 files, you've got almost 40%
chance of a collision, and if you try 10001, you've got a 100% chance.
So is it really okay to reuse the same integer for different files?
I tried to help you when you were using the md5 algorithm. By using
enough digits/characters, you can cut the likelihood of a collision
quite small. But 4 digits, don't be ridiculous.
--
DaveA
--
http://mail.python.org/mailman/listinfo/python-list
Re: Converting a string to a number by using INT (no hash method)
On 01/22/2013 11:37 AM, Ferrous Cranus wrote:
== pin = int(
htmlpage.encode(hex), 16 ) % 1
==
Can you please explain the differences to what you have posted
opposed to this perl coding?
== foreach my
$ltr(@ltrs){ $hash = ( $hash + ord($ltr)) %1;
==
I want to understand this and see it implemented in Python.
It isn't quite the thing. The perl code is merely a checksum of the
ascii value of the characters in the file name, that is then chopped
down to a number 1. The Python code is taking the ascii value of
each character in the file name, converting it to a hexadecimal pair of
digits, stringing them all out into a long string, then converting that
to a number using the hexadecimal number parser. This results in a
*very* large number, 8-bits per letter in the original file name, and
then chops that down to 1. Technically neither method is a hash and
neither will generate unique numbers.
Here's the python algorithm used on a short word:
'hello' = '68656c6c6f' (h = 0x68', e=0x65', 0x6c', 0=0x6f)
= 0x68656c6c6f = 448378203247
mod that with 1 and you get 3247
If you would simply run the python interpreter and try these things out
you could see how and why they work or not work. What is stopping you
from doing this?
--
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Re: Converting a string to a number by using INT (no hash method)
On 01/22/2013 01:37 PM, Ferrous Cranus wrote:
snip
==
pin = int( htmlpage.encode(hex), 16 ) % 1
==
Can you please explain the differences to what you have posted opposed to this
perl coding?
==
foreach my $ltr(@ltrs){
$hash = ( $hash + ord($ltr)) %1;
==
I want to understand this and see it implemented in Python.
The perl code will produce the same hash for abc.html as for
bca.html That's probably one reason Leonard didn't try to
transliterate the buggy code.
In any case, the likelihood of a hash collision for any non-trivial
website is substantial. As I said elsewhere, if you hash 100 files you
have about a 40% chance of a collision.
If you hash 220 files, the likelihood is about 90%
--
DaveA
--
http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
Ferrous Cranus wrote:
Τη Τρίτη, 22 Ιανουαρίου 2013 6:11:20 μ.μ. UTC+2, ο χρήστης Chris Angelico
έγραψε:
all of it. You are asking something that is fundamentally
impossible[1]. There simply are not enough numbers to go around.
Fundamentally impossible?
Well
OK: How about this in Perl:
$ cat testMD5.pl
use strict;
foreach my $url(qw@ /index.html /about/time.html @){
hashit($url);
}
sub hashit {
my $url=shift;
my @ltrs=split(//,$url);
my $hash = 0;
foreach my $ltr(@ltrs){
$hash = ( $hash + ord($ltr)) %1;
}
printf %s: %0.4d\n,$url,$hash
}
which yields:
$ perl testMD5.pl
/index.html: 1066
/about/time.html: 1547
$ cat clashes.pl
use strict;
foreach my $url(qw@
/public/fails.html
/large/cannot.html
/number/being.html
/hope/already.html
/being/really.html
/index/breath.html
/can/although.html
@){
hashit($url);
}
sub hashit {
my $url=shift;
my @ltrs=split(//,$url);
my $hash = 0;
foreach my $ltr(@ltrs){
$hash = ( $hash + ord($ltr)) %1;
}
printf %s: %0.4d\n,$url,$hash
}
$ perl clashes.pl
/public/fails.html: 1743
/large/cannot.html: 1743
/number/being.html: 1743
/hope/already.html: 1743
/being/really.html: 1743
/index/breath.html: 1743
/can/although.html: 1743
Hm, I must be holding it wrong...
--
http://mail.python.org/mailman/listinfo/python-list
Re: Converting a string to a number by using INT (no hash method)
Τη Τρίτη, 22 Ιανουαρίου 2013 9:02:48 μ.μ. UTC+2, ο χρήστης Michael Torrie
έγραψε:
On 01/22/2013 11:37 AM, Ferrous Cranus wrote:
== pin = int(
htmlpage.encode(hex), 16 ) % 1
==
Can you please explain the differences to what you have posted
opposed to this perl coding?
== foreach my
$ltr(@ltrs){ $hash = ( $hash + ord($ltr)) %1;
==
I want to understand this and see it implemented in Python.
It isn't quite the thing. The perl code is merely a checksum of the
ascii value of the characters in the file name, that is then chopped
down to a number 1. The Python code is taking the ascii value of
each character in the file name, converting it to a hexadecimal pair of
digits, stringing them all out into a long string, then converting that
to a number using the hexadecimal number parser. This results in a
*very* large number, 8-bits per letter in the original file name, and
then chops that down to 1. Technically neither method is a hash and
neither will generate unique numbers.
Here's the python algorithm used on a short word:
'hello' = '68656c6c6f' (h = 0x68', e=0x65', 0x6c', 0=0x6f)
= 0x68656c6c6f = 448378203247
mod that with 1 and you get 3247
If you would simply run the python interpreter and try these things out
you could see how and why they work or not work. What is stopping you
from doing this?
May i sent you my code by mail so for you see whats wrong and
http://superhost.gr produces error?brbr
1. this is not a script that iam being paid for.
2, this is not a class assignemnt
I just want to use that method of gettign this to work.
--
http://mail.python.org/mailman/listinfo/python-list
Oportunidade: Desenvolvedor Python/Django Sênior - RJ
Arpex Capital Seleciona: Desenvolvedor Python/Django Sênior Estamos em busca daqueles(as) que: acham que meritocracia é indispensável, programam desde a infância, possuem sede por aprender e programar e querem trabalhar muito para fazer algo especial! O desenvolvedor estará envolvido em um projeto Python/Django para uma das startups da ArpexCapital (fundo de investimentos americano com foco no mercado brasileiro). Skills necessários: Python, HTML, MySQL Skills desejáveis (bônus): Framework Django, Javascript, Linux, Scrum ou XP Local de Trabalho: Centro/RJ Os interessados deverão enviar o CV com pretensão salarial para kgar...@arpexcapital.com.br, mencionando no assunto Desenvolvedor Python/Django Sênior. -- http://mail.python.org/mailman/listinfo/python-list
Re: Importing class from another file
In mailman.830.1358883233.2939.python-l...@python.org Kevin Holleran kdaw...@gmail.com writes: I have a class called My_Class in a subdir called Sub_Dir. in My_Class.py is the following class My_Class_Connector: def __init__(self,un,pw,qs_srv=domain.com): self.username = un self.password = pw Then I am trying to call from a script in the parent dir like this: from Sub_Dir.My_Class import * q_api = My_Class.My_Class_Connector(string1,string2) Even if your import had worked, this would be wrong. You're importing everything from Sub_Dir.My_Class, so My_Class_Connector is in the current namespace. You don't need to add My_Class. on the front (and in fact it's an error to do so.) Traceback (most recent call last): File testing.py, line 1, in module from Sub_Dir.My_Class import * ImportError: No module named Sub_Dir.My_Class Is there a file named __init__.py in Sub_Dir? A directory must contain that file in order to be considered a module. (If you don't know what to put in the file, just leave it empty.) -- John Gordon A is for Amy, who fell down the stairs gor...@panix.com B is for Basil, assaulted by bears -- Edward Gorey, The Gashlycrumb Tinies -- http://mail.python.org/mailman/listinfo/python-list
Re: Converting a string to a number by using INT (no hash method)
On 22 Jan 2013, at 19:28, Ferrous Cranus nikos.gr...@gmail.com wrote:
Τη Τρίτη, 22 Ιανουαρίου 2013 9:02:48 μ.μ. UTC+2, ο χρήστης Michael Torrie
έγραψε:
On 01/22/2013 11:37 AM, Ferrous Cranus wrote:
== pin = int(
htmlpage.encode(hex), 16 ) % 1
==
Can you please explain the differences to what you have posted
opposed to this perl coding?
== foreach my
$ltr(@ltrs){ $hash = ( $hash + ord($ltr)) %1;
==
I want to understand this and see it implemented in Python.
It isn't quite the thing. The perl code is merely a checksum of the
ascii value of the characters in the file name, that is then chopped
down to a number 1. The Python code is taking the ascii value of
each character in the file name, converting it to a hexadecimal pair of
digits, stringing them all out into a long string, then converting that
to a number using the hexadecimal number parser. This results in a
*very* large number, 8-bits per letter in the original file name, and
then chops that down to 1. Technically neither method is a hash and
neither will generate unique numbers.
Here's the python algorithm used on a short word:
'hello' = '68656c6c6f' (h = 0x68', e=0x65', 0x6c', 0=0x6f)
= 0x68656c6c6f = 448378203247
mod that with 1 and you get 3247
If you would simply run the python interpreter and try these things out
you could see how and why they work or not work. What is stopping you
from doing this?
May i sent you my code by mail so for you see whats wrong and
http://superhost.gr produces error?brbr
1. this is not a script that iam being paid for.
2, this is not a class assignemnt
I just want to use that method of gettign this to work.
--
http://mail.python.org/mailman/listinfo/python-list
All pages, strings and objects map to:
http://redwing.hutman.net/~mreed/warriorshtm/ferouscranus.htm
Alan
--
http://mail.python.org/mailman/listinfo/python-list
Re: Understanding while...else...
On 01/22/2013 09:44 AM, Terry Reedy wrote: Several people have trouble understanding Python's while-else and for-else constructs. It is actually quite simple if one starts with if-else, which few have any trouble with. Start with, for example if n 0: n -= 1 else: n = None The else clause is executed if and when the condition is false. (That the code is useless is not the point here.) Now use pseudo-Python label and goto statements to repeatedly decrement n label: check if n 0: n -= 1 goto: check else: n = None The else clause is executed if and when the condition is false. Now use a real Python while statement to do the *same thing*. while n 0: n -= 1 else: n = None I understand how it works (although it did take a while for it to sink in); my gripe, and probably why it is misunderstood so often, is that nine times out of ten when I /want/ to use a while-else or for-else I only want the true/false check /once/, at the beginning of the loop. /Occasionally/ I'll actually have use for the search pattern, and then I can use the while- or for-else construct, but that's pretty rare for me. ~Ethan~ -- http://mail.python.org/mailman/listinfo/python-list
RE: Converting a string to a number by using INT (no hash method)
The perl code will produce the same hash for abc.html as for bca.html That's probably one reason Leonard didn't try to transliterate the buggy code. Actually, to give credit where it's due, it wasn't me. I just modified someone else's interesting solution in this thread and added the silly limit of 1 to it. In any case, the likelihood of a hash collision for any non-trivial website is substantial. Exactly. Four digits is hardly enough range for it to be even remotely safe. And even then range isn't really the issue as technically it just improves your odds. The results of a modulus operator are still non-unique no matter how many digits are there to work with ... within reason. Statistically anyone who buys a ticket could potentially win the lottery no matter how bad the odds are. ;) And now back to the OP, I'm still confused on this four-digit limitation. Why isn't the limitation at least adhering to a bytelength like byte/short/long? Is this database storing a string of characters instead of an actual number? (And if so, then why not just block out 255 characters instead of 4 to store a whole path? Or at the very least treat 4 characters as 4 bytes to greatly increase the numeric range?) -- http://mail.python.org/mailman/listinfo/python-list
Re: Converting a string to a number by using INT (no hash method)
On 01/22/2013 03:30 PM, Leonard, Arah wrote: The perl code will produce the same hash for abc.html as for bca.html That's probably one reason Leonard didn't try to transliterate the buggy code. Actually, to give credit where it's due, it wasn't me. I just modified someone else's interesting solution in this thread and added the silly limit of 1 to it. That's okay. The OP doesn't seem to know anything about programming, or about information theory, so the fact you gave a single line that actually works must be extraordinarily valuable to him. When he was trying to use the md5 module, I gave him the hints about his five programming errors, and was about to expand on it when i noticed his 4 digit limitation. In any case, the likelihood of a hash collision for any non-trivial website is substantial. Exactly. Four digits is hardly enough range for it to be even remotely safe. And even then range isn't really the issue as technically it just improves your odds. The results of a modulus operator are still non-unique no matter how many digits are there to work with ... within reason. Statistically anyone who buys a ticket could potentially win the lottery no matter how bad the odds are. ;) And now back to the OP, I'm still confused on this four-digit limitation. Why isn't the limitation at least adhering to a bytelength like byte/short/long? Is this database storing a string of characters instead of an actual number? (And if so, then why not just block out 255 characters instead of 4 to store a whole path? Or at the very least treat 4 characters as 4 bytes to greatly increase the numeric range?) I wish I had done the internet search earlier. This name 'ferrous cranus' is a pseudonym of various trolls, and anybody who'd adopt it isn't worth our time. Thanks to Alan Spence for spotting that. I'll plonk 'ferrous cranus' now. -- DaveA -- http://mail.python.org/mailman/listinfo/python-list
Re: Importing class from another file
Thanks, you got me straightened out. -- Kevin Holleran Master of Science, Computer Information Systems Grand Valley State University Master of Business Administration Western Michigan University SANS GCFA, SANS GCFE, CCNA, ISA, MCSA, MCDST, MCP Do today what others won't, do tomorrow what others can't - SEALFit We are what we repeatedly do. Excellence, then, is not an act, but a habit. - Aristotle On Tue, Jan 22, 2013 at 2:47 PM, John Gordon gor...@panix.com wrote: In mailman.830.1358883233.2939.python-l...@python.org Kevin Holleran kdaw...@gmail.com writes: I have a class called My_Class in a subdir called Sub_Dir. in My_Class.py is the following class My_Class_Connector: def __init__(self,un,pw,qs_srv=domain.com): self.username = un self.password = pw Then I am trying to call from a script in the parent dir like this: from Sub_Dir.My_Class import * q_api = My_Class.My_Class_Connector(string1,string2) Even if your import had worked, this would be wrong. You're importing everything from Sub_Dir.My_Class, so My_Class_Connector is in the current namespace. You don't need to add My_Class. on the front (and in fact it's an error to do so.) Traceback (most recent call last): File testing.py, line 1, in module from Sub_Dir.My_Class import * ImportError: No module named Sub_Dir.My_Class Is there a file named __init__.py in Sub_Dir? A directory must contain that file in order to be considered a module. (If you don't know what to put in the file, just leave it empty.) -- John Gordon A is for Amy, who fell down the stairs gor...@panix.com B is for Basil, assaulted by bears -- Edward Gorey, The Gashlycrumb Tinies -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: Converting a string to a number by using INT (no hash method)
In mailman.829.1358882945.2939.python-l...@python.org Ferrous Cranus nikos.gr...@gmail.com writes: May i sent you my code by mail so for you see whats wrong and http://superhost.gr produces error? I tried going to that address and got some error output. I noticed this in the error dump: 186 if cursor.rowcount == 0: 187 cursor.execute( '''INSERT INTO visitors(pin, host , hits, useros, browser, date) VALUES(%s, %s, %s, %s, %s)''', (pin, hos t, 1, useros, browser, date) ) The INSERT statement gives six column names but only five placeholders (%s) in the VALUES clause. Perhaps that's the problem? -- John Gordon A is for Amy, who fell down the stairs gor...@panix.com B is for Basil, assaulted by bears -- Edward Gorey, The Gashlycrumb Tinies -- http://mail.python.org/mailman/listinfo/python-list
Re: Sending a broadcast message using raw sockets
On Wed, Jan 23, 2013 at 4:57 AM, Peter Steele pwste...@gmail.com wrote: In fact, I have used scapy in the past, but I am working in a restricted environment and don't have this package available. It provides tones more than I really need anyway, and I figured a simple raw socket send/receive can't be *that* hard. I may have to reverse engineer some C code, such as dhclient... Yeah, I think you're working with something fairly esoteric there - bypassing the lower tiers of support (routing etc). Chances are you won't find any good Python examples, and C's all you'll have. Are you reasonably familiar with C? Point to note: Raw sockets *may* require special privileges. Some systems require that only root employ them, for security's sake. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: Sending a broadcast message using raw sockets
Actually, I used to teach C, so yeah, I know it pretty well. :-) Scapy is a possibility, I just need to add it to my environment (which doesn't have a C compiler). I can jury rig something though. On Tuesday, January 22, 2013 1:19:14 PM UTC-8, Chris Angelico wrote: On Wed, Jan 23, 2013 at 4:57 AM, Peter Steele pwste...@gmail.com wrote: In fact, I have used scapy in the past, but I am working in a restricted environment and don't have this package available. It provides tones more than I really need anyway, and I figured a simple raw socket send/receive can't be *that* hard. I may have to reverse engineer some C code, such as dhclient... Yeah, I think you're working with something fairly esoteric there - bypassing the lower tiers of support (routing etc). Chances are you won't find any good Python examples, and C's all you'll have. Are you reasonably familiar with C? Point to note: Raw sockets *may* require special privileges. Some systems require that only root employ them, for security's sake. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: Sending a broadcast message using raw sockets
Peter Steele wrote in news:96947c45-f16b-4e97-b055-edc1241ee...@googlegroups.com in comp.lang.python: I just tried running you code, and the sendto call fails with Network is unreachable. That's what I expected, based on other tests I've done. That's why I was asking about how to do raw sockets, since tools like dhclient use raw sockets to do what they do. It can clearly be duplicated in Python, I just need to find some code samples on how to construct a raw packet. Try s = socket.socket( socket.AF_INET, socket.SOCK_RAW ) I tried this on windows and it needed admin privaleges to run. Rob. -- -- http://mail.python.org/mailman/listinfo/python-list
Re: Understanding while...else...
On 1/22/2013 3:09 PM, Ethan Furman wrote: On 01/22/2013 09:44 AM, Terry Reedy wrote: Several people have trouble understanding Python's while-else and for-else constructs. It is actually quite simple if one starts with if-else, which few have any trouble with. Start with, for example if n 0: n -= 1 else: n = None The else clause is executed if and when the condition is false. (That the code is useless is not the point here.) Now use pseudo-Python label and goto statements to repeatedly decrement n label: check if n 0: n -= 1 goto: check else: n = None The else clause is executed if and when the condition is false. Now use a real Python while statement to do the *same thing*. while n 0: n -= 1 else: n = None I understand how it works (although it did take a while for it to sink in); my gripe, and probably why it is misunderstood so often, is that nine times out of ten when I /want/ to use a while-else or for-else I only want the true/false check /once/, at the beginning of the loop. I do not understand what you are saying. There already is only one true/false check, at the beginning of the loop. If you only want the check *performed* once, you would use if-else. But I presume you know this. -- Terry Jan Reedy -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
On Tue, 22 Jan 2013 11:36:31 -0700, Michael Torrie wrote: I'm sorry you are getting so frustrated. There's obviously a language barrier here, I don't think there is. The OP's posts have been written in excellent English. I think we've been well and truly trolled, by somebody who even uses the name of a troll as his user name. http://redwing.hutman.net/~mreed/warriorshtm/ferouscranus.htm Thanks to Alan Spence for linking to the Flame Warriors web site. I can't believe that it took so long for anyone to realise that we were being trolled. I hate to admit it, but I kind of have to admire somebody who can play dumb so well for so long for the lulz. Well played Ferrous Cranus, well played. Now please go and play your silly games elsewhere. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
On Tue, 22 Jan 2013 11:36:31 -0700, Michael Torrie wrote: I'm sorry you are getting so frustrated. There's obviously a language barrier here, I don't think there is. The OP's posts have been written in excellent English. I think we've been well and truly trolled, by somebody who even uses the name of a troll as his user name. http://redwing.hutman.net/~mreed/warriorshtm/ferouscranus.htm Thanks to Alan Spence for linking to the Flame Warriors web site. I can't believe that it took so long for anyone to realise that we were being trolled. I hate to admit it, but I kind of have to admire somebody who can play dumb so well for so long for the lulz. Well played Ferrous Cranus, well played. Now please go and play your silly games elsewhere. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: pycache directories
On Tuesday, January 22, 2013 1:01:44 AM UTC-5, Terry Reedy wrote: I am doing some OO python3 where I am using multiple dirs/sub-dirs. So everything works fine, however when I run code __pycache__ directories are being created in every directory touched by the execution. This is much better than having multiple .pyc files in every directory, as in Py2. You should soon learn to ignore them. Is it possible to set a configuration to be able to create these pycache directories in a specific location? No. (I am very sure.) You can however, not have the .pyc files written, but that means recompile with every run. So that option is meant for running off a read-only medium. -- Terry Jan Reedy Thanks Terry. I understand needing to adjust. Appreciate this forum. Monosij -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
On Tue, 22 Jan 2013 11:36:31 -0700, Michael Torrie wrote: I'm sorry you are getting so frustrated. There's obviously a language barrier here, I don't think there is. The OP's posts have been written in excellent English. I think we've been well and truly trolled, by somebody who even uses the name of a troll as his user name. http://redwing.hutman.net/~mreed/warriorshtm/ferouscranus.htm Thanks to Alan Spence for linking to the Flame Warriors web site. I can't believe that it took so long for anyone to realise that we were being trolled. I hate to admit it, but I kind of have to admire somebody who can play dumb so well for so long for the lulz. Well played Ferrous Cranus, well played. Now please go and play your silly games elsewhere. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Retrieving the full command line
On Tue, 22 Jan 2013 15:07:18 +, Tim Golden wrote: On 22/01/2013 14:53, Terry Reedy wrote: On 1/22/2013 4:24 AM, Tim Golden wrote: [Python 2.7/3.3 (and hg tip) running on Windows. Not Windows-specific, though]. I use the python -mpackage incantation to run a package which has a __main__.py module and which uses relative imports internally. I'm developing under cherrypy which includes a reloader for development. The reloader attempts to rebuild the original command line by combining sys.executable and sys.argv and then does an execv. There does not appear to be any way within Python of determining the command line I used. The combination of sys.executable and sys.argv in this case will look like: c:\python33\python.exe app/__main__.py. But running this precludes the use of package-relative imports. If I understand right, the reloader should be updated to translate 'x/__main__.py' to '-m x'. Filenames of form'__x__' are reserved, in a sense, like similar identifiers in programs, and '__main__.py' should not be used for a file meant to executed directly. To be clear: it's Python itself, not the reloader, which is coming up with __main__.py. sys.executable is c:\python33\python.exe and sys.argv is ['c:\path\to\__main__.py'] for a program which has been started by c:\python33\python.exe -mpath\to. I don't believe you can give direct paths to the -m flag. It uses the normal import mechanism to locate a module or package, so you have to give it a name which would be importable. c:\python33\python.exe -m app would work, where app is either a package or module: C:\something\on\PYTHONPATH\app\__main__.py C:\something\on\PYTHONPATH\app.py Obviously, there is any number of ways around this specific issue, including what you suggest: a canonical rewrite of python path\to\__main__.py into python -mpath\to. But it's not clear to me that this rewrite should be the responsibility of calling code. I am a bit disturbed that you cannot distinguish between: python C:\something\on\pythonpath\app\__main__.py python -m app by inspecting the command line. I consider it a bug, or at least a misfeature, if Python transforms the command line before making it available in sys.argv. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Uniquely identifying each every html template
On 01/21/2013 08:00 AM, Ferrous Cranus wrote: Τη Δευτέρα, 21 Ιανουαρίου 2013 2:47:54 μ.μ. UTC+2, ο χρήστης Joel Goldstick έγραψε: This is trolling Ferrous. you are a troll. Go away Just because you cannot answer my question that doesn't make me a troll you know. It becomes trolling when you refuse to even try to understand the answers you are given. And you refuse to take the advise of many knowledgeable people who have a lot more experience in web application development than you do (I'm not including myself in this category). You refuse to use a database in a way that it was designed to be used. If you're unwilling to identify a file based on name, path, and contents, then you're only solution is to use a database to associate a particular file with an id. When you move or rename the file you have to update the database. That's the only answer we can give you. Asking the same question over and over again on different threads is not going to change this. This is the third thread you've started on essentially the same question. And you're getting the same advice on each thread. There's a reason for this! It's apparent that you don't have a lot of background in computer programming or algorithms. That's okay. No one will fault you for this. But if you're going to reject the solutions posed by those with such background, then it behooves you to gain a bit of knowledge in these areas and learn why these suggestions are going made. I in no way intend anything I have said to be condescending. It's just that those who are honestly trying to help you are getting frustrated. And possibly you will interpret this frustration as hostility or elitism, which it really is not. -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
On Tue, 22 Jan 2013 09:33:00 -0800, rusi wrote: On Jan 22, 8:59 pm, Ferrous Cranus nikos.gr...@gmail.com wrote: I just need a way to CONVERT a string(absolute path) to a 4-digit unique number with INT!!! That's all i want!! But i cannot make it work :( I just need a way to eat my soup with a screwdriver. No I WONT use a spoon. Im starving HELP Very well done :-) -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
On Tue, 22 Jan 2013 11:36:31 -0700, Michael Torrie wrote: I'm sorry you are getting so frustrated. There's obviously a language barrier here, I don't think there is. The OP's posts have been written in excellent English. I think we've been well and truly trolled, by somebody who even uses the name of a troll as his user name. http://redwing.hutman.net/~mreed/warriorshtm/ferouscranus.htm Thanks to Alan Spence for linking to the Flame Warriors web site. I can't believe that it took so long for anyone to realise that we were being trolled. I hate to admit it, but I kind of have to admire somebody who can play dumb so well for so long for the lulz. Well played Ferrous Cranus, well played. Now please go and play your silly games elsewhere. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
On 01/22/2013 04:40 PM, Steven D'Aprano wrote: On Tue, 22 Jan 2013 11:36:31 -0700, Michael Torrie wrote: I'm sorry you are getting so frustrated. There's obviously a language barrier here, I don't think there is. The OP's posts have been written in excellent English. Well, his English is pretty good. But his quote string is Cyrillic, and he uses phrases that are not common in everyday English, such as I am compelled. English is clearly his second language. -- http://mail.python.org/mailman/listinfo/python-list
Re: Else statement executing when it shouldnt
On Tue, 22 Jan 2013 16:48:35 +0100, Thomas Boell wrote: On Wed, 23 Jan 2013 02:42:27 +1100 Chris Angelico ros...@gmail.com wrote: On Wed, Jan 23, 2013 at 2:39 AM, Thomas Boell tboell@domain.invalid wrote: Huh?! I would have expected all your examples to raise a SyntaxError or IndentationError. Why don't they? Is 'else' not required to have a matching 'if'? Other things can have else, including 'for' and 'while' loops. :) I must say, that's bound to be confusing for anyone who knows any language other than Python (or none, even). Syntax like that is an accident waiting to happen... Oh it's even worse than that. I reckon that nearly everyone thinks that for...else runs the else clause if the for loop is empty, at least the first time they see it. Or for the slow of thinking like me, the first few dozen times. # this is wrong, but it looks right for x in sequence: do_something_with(x) else: print sequence is empty But no, that's not what it does. `for...else` is actually more like this: # this is right for x in sequence: do_something_with(x) if condition: break else: print condition was never true That's right. The `else` block *unconditionally* executes after the `for` block. The only way to skip it is to use `break`, which skips all the way out of the combined for...else statement. This is a very useful feature, very badly named. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
On Tue, 22 Jan 2013 09:33:00 -0800, rusi wrote: On Jan 22, 8:59 pm, Ferrous Cranus nikos.gr...@gmail.com wrote: I just need a way to CONVERT a string(absolute path) to a 4-digit unique number with INT!!! That's all i want!! But i cannot make it work :( I just need a way to eat my soup with a screwdriver. No I WONT use a spoon. Im starving HELP Very well done :-) -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
On Tue, 22 Jan 2013 10:07:21 -0800, Ferrous Cranus wrote: No, because i DO NOT WANT to store LOTS OF BIGS absolute paths in the database. They are not big. They are tiny. Please stop being too arrogant to listen to advice from people who have been programming for years or decades. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
On Tue, 22 Jan 2013 11:36:31 -0700, Michael Torrie wrote: I'm sorry you are getting so frustrated. There's obviously a language barrier here, I don't think there is. The OP's posts have been written in excellent English. I think we've been well and truly trolled, by somebody who even uses the name of a troll as his user name. http://redwing.hutman.net/~mreed/warriorshtm/ferouscranus.htm Thanks to Alan Spence for linking to the Flame Warriors web site. I can't believe that it took so long for anyone to realise that we were being trolled. I hate to admit it, but I kind of have to admire somebody who can play dumb so well for so long for the lulz. Well played Ferrous Cranus, well played. Now please go and play your silly games elsewhere. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
On Tue, 22 Jan 2013 11:36:31 -0700, Michael Torrie wrote: I'm sorry you are getting so frustrated. There's obviously a language barrier here, I don't think there is. The OP's posts have been written in excellent English. I think we've been well and truly trolled, by somebody who even uses the name of a troll as his user name. http://redwing.hutman.net/~mreed/warriorshtm/ferouscranus.htm Thanks to Alan Spence for linking to the Flame Warriors web site. I can't believe that it took so long for anyone to realise that we were being trolled. I hate to admit it, but I kind of have to admire somebody who can play dumb so well for so long for the lulz. Well played Ferrous Cranus, well played. Now please go and play your silly games elsewhere. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
On Tue, 22 Jan 2013 11:36:31 -0700, Michael Torrie wrote: I'm sorry you are getting so frustrated. There's obviously a language barrier here, I don't think there is. The OP's posts have been written in excellent English. I think we've been well and truly trolled, by somebody who even uses the name of a troll as his user name. http://redwing.hutman.net/~mreed/warriorshtm/ferouscranus.htm Thanks to Alan Spence for linking to the Flame Warriors web site. I can't believe that it took so long for anyone to realise that we were being trolled. I hate to admit it, but I kind of have to admire somebody who can play dumb so well for so long for the lulz. Well played Ferrous Cranus, well played. Now please go and play your silly games elsewhere. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Using filepath method to identify an .html page
On Tue, 22 Jan 2013 11:36:31 -0700, Michael Torrie wrote: I'm sorry you are getting so frustrated. There's obviously a language barrier here, I don't think there is. The OP's posts have been written in excellent English. I think we've been well and truly trolled, by somebody who even uses the name of a troll as his user name. http://redwing.hutman.net/~mreed/warriorshtm/ferouscranus.htm Thanks to Alan Spence for linking to the Flame Warriors web site. I can't believe that it took so long for anyone to realise that we were being trolled. I hate to admit it, but I kind of have to admire somebody who can play dumb so well for so long for the lulz. Well played Ferrous Cranus, well played. Now please go and play your silly games elsewhere. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
