Question about PANDAS
On Windows my advice would be to use the anaconda installer. Linux pip will work flawlessly. If you install anaconda full then you will have pandas as well as an ipython launcher installed. Sayth -- https://mail.python.org/mailman/listinfo/python-list
Re: OS X Menubar in Tkinter
Ned Deily wrote: The name that shows up in the menu is derived by OS X from the application name in the executing application bundle. I found a hackish way to change it at run time while working on PyGUI, but it requires using PyObjC: from Foundation import NSBundle def change_application_name(new_name): # Arrange for the application name to be used as the title # of the application menu. ns_bundle = NSBundle.mainBundle() if ns_bundle: ns_info = ns_bundle.localizedInfoDictionary() if not ns_info: ns_info = ns_bundle.infoDictionary() if ns_info: if ns_info['CFBundleName'] == Python: ns_info['CFBundleName'] = new_name -- Greg -- https://mail.python.org/mailman/listinfo/python-list
Re: Quick Question About Setting Up Pytz
Ok, thanks everyone. I just need to spend more time with this stuff. It's definitely slow going. On Sat, Oct 18, 2014 at 11:16 PM, Rustom Mody rustompm...@gmail.com wrote: On Sunday, October 19, 2014 8:25:53 AM UTC+5:30, Ben Finney wrote: Chris Angelico writes: Try learning Python itself, rather than playing around with extension packages like pytz. To be fair, You need to install 'pytz' to work correctly with date and time values is correct advice. If the OP doesn't install it early, then works with timestamps, problems are inevitable -- at which point oh, you needed to do that first will be inevitable. It's lose-lose. Yes It's a sad fact that MS Windows has completely useless timezone support, and this install a third-party package hurdle is a cost that is paid by all people trying to set up Python on MS Windows. About MS-lacunae Ive nothing to say [Just head over to a debian list like users or vote or.. and witness the riot going on over systemd... Hard to believe all's right in Linux-land] As for this OP and similar problems -- yes python is in a peculiar position. Because of 'batteries included' beginners can do powerful stuff. However sometimes the batteries need to be supplemented. And then there's a problem -- its not clear whether - the beginner is having classic noob problems. Expert just needs to tweak a command a bit and he's sailing - the beginner is in somewhat uncharted (research-needed) land -- charting the route between mutually complementary AND competing setup tools I believe python must be some sort of record setter in this that o pip is a replacement for easy_install o you install pip with easy_install !! -- https://mail.python.org/mailman/listinfo/python-list -- https://mail.python.org/mailman/listinfo/python-list
Re: Question about PANDAS
Thanks guys. I just feel frustrated that I can't do something useful. I'm reading all about dictionaries, and types, and touples. Then I read about string manipulation and loops; two of my favorite things to do. Then I read about logic: -719 = 833 False That's great, but it's just not very useful for me. I thought I could use Python to do screen scraping. Right now, I use R to do almost all my screen scraping. I used to use Excel, but r is just light years easier to use, so I'll go with that. I thought Python may be even easier to use than R, and perhaps even more powerful too. However, since I picked up my first Python book about 3 months ago, I seem to be learning all kinds of useless things, and no practical things. When I find cool code samples online, I can't even get them to run. Last week I found a small sample of code that supposedly merges data from several text files in a folder into one single file. I played with it for a couple hours, and never got it to work. In less than 15 minutes, I could have done the merging task, using Excel, Access, VB.NET, C#.NET, or even a batch file. I guess I'll just keep reading these books. I have 10 books, and I'm most of the way throguh 4 of them. So far, none are teaching me anything that I could use in my role managing financial assets. Maybe something will click soon. I hope so. Thanks again everyone. On Sun, Oct 19, 2014 at 10:48 AM, Joel Goldstick joel.goldst...@gmail.com wrote: On Sun, Oct 19, 2014 at 10:19 AM, Mark Lawrence breamore...@yahoo.co.uk wrote: On 18/10/2014 21:00, ryguy7272 wrote: I'm trying to install Pandas. I went to this link. https://pypi.python.org/pypi/pandas/0.14.1/#downloads I downloaded this: pandas-0.14.1.win32-py2.7.exe (md5) I have Python27 installed. So, I run the executable and re-run my Python script and I get the same error as before. Traceback (most recent call last): File C:/Python27/stock_data.py, line 3, in module import pandas as pd ImportError: No module named pandas What messages did you get when you run the installer? Most people use pip to install python packages Are you writing code and putting it in C:/Python27/ ? isn't that where python is installed. You should write your code in some directory under your user tree. I thought I just installed it! Isn't that what the executable is for? It seems like 100% of my errors are with uninstalled libraries. I don't understand why there are so, so, so many dependencies running Python. Also, I don't understand why something isn't installed, right after I just installed it. Can someone please explain the logic to me? Thanks. Have you actually run any code from the Python tutorial yet? You can do lots of things with Python that require no third party libraries. In fact many questions here go I need a solution to this that must be in the stdlib. It strikes me that you're trying to enter an Iron Man competition before you can crawl. -- My fellow Pythonistas, ask not what our language can do for you, ask what you can do for our language. Mark Lawrence -- https://mail.python.org/mailman/listinfo/python-list -- Joel Goldstick http://joelgoldstick.com -- https://mail.python.org/mailman/listinfo/python-list -- https://mail.python.org/mailman/listinfo/python-list
time.perf_counter in Python 2?
Hello, I wrote a script that does some time measurements. It uses time.perf_counter() from Python 3 which works very well. Now I need to backport it to python 2. Docs say that time.clock() is way to go: time.clock() On Unix, return the current processor time as a floating point number expressed in seconds. The precision, and in fact the very definition of the meaning of “processor time”, depends on that of the C function of the same name, but in any case, this is the function to use for benchmarking Python or timing algorithms. On Windows, this function returns wall-clock seconds elapsed since the first call to this function, as a floating point number, based on the Win32 function QueryPerformanceCounter(). The resolution is typically better than one microsecond. But for me it always returns the almost same number, nothing time like: Python 2.7.3 (default, Feb 27 2014, 19:58:35) [GCC 4.6.3] on linux2 Type help, copyright, credits or license for more information. import time time.clock() 0.03 time.clock() 0.03 time.clock() 0.04 time.clock() 0.04 What's wrong there? Thanks, Florian -- https://mail.python.org/mailman/listinfo/python-list
Re: time.perf_counter in Python 2?
On Mon, Oct 20, 2014 at 6:47 PM, Florian Lindner mailingli...@xgm.de wrote: time.clock() On Unix, return the current processor time as a floating point number expressed in seconds. The precision, and in fact the very definition of the meaning of “processor time”, depends on that of the C function of the same name, but in any case, this is the function to use for benchmarking Python or timing algorithms. But for me it always returns the almost same number, nothing time like: You're doing practically no work in there. You're using almost no processor time - the interpreter's waiting for the user, not actually busy. If you create a busyloop, you'll see time.clock() go up roughly linearly: rosuav@sikorsky:~$ python Python 2.7.3 (default, Mar 13 2014, 11:03:55) [GCC 4.7.2] on linux2 Type help, copyright, credits or license for more information. import time def killtime(): ... start=time.time() ... end=time.clock()+1 ... while time.clock()end: pass ... return time.time()-start ... killtime() 1.0048420429229736 killtime() 1.004641056060791 killtime() 1.0081689357757568 killtime() 1.0019969940185547 killtime() 1.0044770240783691 This function will do its best to waste one second of CPU time. As you see, it's taking pretty much exactly one second of wall time to do so (as measured by time.time()). At the end of a few of these runs, time.clock() will return a value that's fairly close to 1.0 times the number of executions of killtime(), as the other work Python's doing is insignificant by comparison. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
Re: time.perf_counter in Python 2?
Florian Lindner wrote: Hello, I wrote a script that does some time measurements. It uses time.perf_counter() from Python 3 which works very well. Now I need to backport it to python 2. Docs say that time.clock() is way to go: time.clock() On Unix, return the current processor time as a floating point number expressed in seconds. The precision, and in fact the very definition of the meaning of “processor time”, depends on that of the C function of the same name, but in any case, this is the function to use for benchmarking Python or timing algorithms. On Windows, this function returns wall-clock seconds elapsed since the first call to this function, as a floating point number, based on the Win32 function QueryPerformanceCounter(). The resolution is typically better than one microsecond. But for me it always returns the almost same number, nothing time like: Python 2.7.3 (default, Feb 27 2014, 19:58:35) [GCC 4.6.3] on linux2 Type help, copyright, credits or license for more information. import time time.clock() 0.03 time.clock() 0.03 time.clock() 0.04 time.clock() 0.04 What's wrong there? While clock is not the recommended timer on Linux the granularity is still higher over here: time.clock() 0.06874 time.clock() 0.069221 time.clock() 0.069782 time.clock() 0.070309 That or you can type faster ;) Here's an excerpt from the 2.7 timeit.py: if sys.platform == win32: # On Windows, the best timer is time.clock() default_timer = time.clock else: # On most other platforms the best timer is time.time() default_timer = time.time In Python3.4 this has become default_timer = time.perf_counter So I'd go with timeit.default_timer(). -- https://mail.python.org/mailman/listinfo/python-list
Re: Question about PANDAS
On 19/10/2014 20:57, Ryan Shuell wrote: Thanks guys. I just feel frustrated that I can't do something useful. I'm reading all about dictionaries, and types, and touples. Then I read about string manipulation and loops; two of my favorite things to do. Then I read about logic: -719 = 833 False That's great, but it's just not very useful for me. I thought I could use Python to do screen scraping. Right now, I use R to do almost all my screen scraping. I used to use Excel, but r is just light years easier to use, so I'll go with that. I thought Python may be even easier to use than R, and perhaps even more powerful too. However, since I picked up my first Python book about 3 months ago, I seem to be learning all kinds of useless things, and no practical things. When I find cool code samples online, I can't even get them to run. Last week I found a small sample of code that supposedly merges data from several text files in a folder into one single file. I played with it for a couple hours, and never got it to work. In less than 15 minutes, I could have done the merging task, using Excel, Access, VB.NET http://VB.NET, C#.NET, or even a batch file. I guess I'll just keep reading these books. I have 10 books, and I'm most of the way throguh 4 of them. So far, none are teaching me anything that I could use in my role managing financial assets. Maybe something will click soon. I hope so. Thanks again everyone. For screen scraping you need Beautiful Soup, but if you can't run anything yet and can't install anything yet what is the point? You can read as many books as you like, but until you understand the basics of Python and not other languages that you've previously used, you'll get precisely nowhere. -- My fellow Pythonistas, ask not what our language can do for you, ask what you can do for our language. Mark Lawrence -- https://mail.python.org/mailman/listinfo/python-list
Re: Quick Question About Setting Up Pytz
On 19/10/2014 21:18, Ryan Shuell wrote: Ok, thanks everyone. I just need to spend more time with this stuff. It's definitely slow going. Please don't top post on this list, thank you. -- My fellow Pythonistas, ask not what our language can do for you, ask what you can do for our language. Mark Lawrence -- https://mail.python.org/mailman/listinfo/python-list
Re: Question about PANDAS
Ryan Shuell ryanshu...@gmail.com writes: Thanks guys. I just feel frustrated that I can't do something useful. I had read many of your messages in the recent past, and I'm under the impression that your frustration has more to do with Python the Infrastructure rather than Python the Language my suggestions will somehow reiterate what was told you in previous threads, 1. scrap everything python from your hard disk and your registry, using unistall as far as possible 2. choose ONE flavour of python, either 2.7.x or 3.4.x - future is with 3.4, - most exaples you'll find were written (are still written...) for 2.7.x 3. the Pyton distribution from official sources contains piles of stuff (batteries included is the motto) but you seem interested in what is called the python scientific stack and this is not there. If you want at once the stdlib AND the great majority of the extra modules you're looking for AND an easy way to install other packages, there are quite a number of third party distributions that fit your ticket very well: entought, anaconda, active state, pyxy, all of them should be good enough but I'n not a Windows guy and I'm not be able to judge. Anyway, read or ask for advice on python windows distributions, chose one, _install using the_ _defaults_, STICK WITH THAT DISTRIBUTION, familiarizing with its infrastructure in terms of installing extra packages, setting virtual environments, using the development tools it offers etc in my very humble opinion, you are discomforted by the multiplicity of the solutions and your quest for the best one... choose one, maybe not the best one for you but trust me, it will be good enough! as soon as you'll be in good terms with Python the language and python the infrastructure, as presented to you by a single language version and a single 3rd party distribution, you will gather momentum in a very short time my best wishes, g -- https://mail.python.org/mailman/listinfo/python-list
Re: OS X Menubar in Tkinter
On Sunday, October 19, 2014 7:49:34 PM UTC-5, Ned Deily wrote: In article a876c046-18aa-4332-bc9a-b1d1181f2...@googlegroups.com, Noble Bell nobleb...@gmail.com wrote: I am using Python 3.4 on Mac OS X and Tinter 8.5. Does anyone have any code that they would share with me on how to remove the Python menu in the menubar at the top next to the apple'? I would like to have the name of my program there instead and my menu. I can add menus but not sure how to do the special menubar. Any help would be appreciated. The name that shows up in the menu is derived by OS X from the application name in the executing application bundle. If you don't package your program up as an OS X application bundle, defaults will be used; in the case of Python OS X framework builds, Python provides a Python.app within the framework to allow the Python process to be automatically promoted to a full OS X gui process. Probably the simplest approach is to use py2app to create a double-clickable app with the name you want. There's an example in an answer to a similar question on Stackoverflow. And there are some old but still relevant details documented in the Tcl/TkAqua FAQ. https://pypi.python.org/pypi/py2app http://stackoverflow.com/questions/8695926/remove-default-python-submenu- with-tkinter-menu-on-mac-osx http://wiki.tcl.tk/12987 -- Ned Deily, n...@acm.org Thank you. I will take a look at all that this afternoon. Seems like I might have seen that post on stack overflow but not for sure. -- https://mail.python.org/mailman/listinfo/python-list
formal program verification in python?
A colleague asked me if there were any formal program verification (or derivation) books which are python based. Sometimes known as 'Hoare/Dijkstra logic' I would be pleasantly surprised if there are! Still... In case anyone knows of any -- https://mail.python.org/mailman/listinfo/python-list
Re: Question about PANDAS
giacomo boffi pec...@pascolo.net writes: 2. choose ONE flavour of python, either 2.7.x or 3.4.x - future is with 3.4, - most exaples you'll find were written (are still written...) for 2.7.x If you're interested in statistics (as comparisons to R suggest), I'd recommend anaconda. It comes with pandas built-in, for one. I'd also suggest the 3.4 version. Finally, just over the past few months, we've crossed over to where 3.4 is fully-functional in the anaconda distribution. (For a while statsmodels was the hold-out; matplotlib had problems before that. Now, though, all is good.) Cheers, Johann -- https://mail.python.org/mailman/listinfo/python-list
Re: Is there an easy way to control indents in Python
On Saturday, 18 October 2014 11:53:16 UTC+1, Steven D'Aprano wrote: I'm curious what aspect of idiomatic Perl code you are referring to. When people talk about Perl code dismissively, I normally think of three things: - excessively long one-liners; - excessive use of symbols and sigils (line noise); - More Than One [Thousand] Ways To Do It I'll preface the following by stating that I program in Python as a hobby and that the only programming I've done professionally was a few years ago now and consisted of a Visual Basic style language (Wonderware Intouch) and a piece of software called ABB Sattline. Not having ever attempted to go beyond even the basics of Perl, the aspect that causes me to refer to Perl 'dismissively' as well comment in this thread, is that I don't find Perl to be an aesthetically pleasing language and I consider Python functions which have no blank lines in them to be a small step towards Perl. Some people do not like Python's indentation rules but for me it's a large part of what draws me to program in Python. Spaces for indentation and blank lines are both aspects of how I like to program. I write in Python because I like to, not because I have to. I think the only reason I might code a function with no blank lines was if I was programming in a language that using blank lines caused it to run too slowly. Are you suggesting that Perl functions tend to be too small? What do you consider too small? No function is too small. A one line function if it helps to describe the higher level code where it is called is fine by me. -- https://mail.python.org/mailman/listinfo/python-list
Re: Is there an easy way to control indents in Python
On Mon, Oct 20, 2014 at 9:54 AM, Simon Kennedy sffjun...@gmail.com wrote: Not having ever attempted to go beyond even the basics of Perl, the aspect that causes me to refer to Perl 'dismissively' as well comment in this thread, is that I don't find Perl to be an aesthetically pleasing language and I consider Python functions which have no blank lines in them to be a small step towards Perl. Some people do not like Python's indentation rules but for me it's a large part of what draws me to program in Python. Spaces for indentation and blank lines are both aspects of how I like to program. I write in Python because I like to, not because I have to. I think the only reason I might code a function with no blank lines was if I was programming in a language that using blank lines caused it to run too slowly. So to be clear, I'm not talking about taking a function like this (contrived) example and just removing the blank line: def find_path(graphdata, start, end): edges = map(str.split, lines) graph = collections.defaultdict(list) for node1, node2, weight in edges: graph[node1].append((node[2], int(weight))) graph[node2].append((node[1], int(weight))) open_heap = [(0, (start,))] closed_set = set() while open_heap: cost, path = heapq.heappop(open_heap) current_node = path[-1] if current_node == end: return path if current_node in closed_set: continue for next_node, weight in graph[current_node]: heapq.heappush((cost + weight, path + (next_node,))) closed_set.add(current_node) else: raise ValueError(No path from start to end) Rather, I'm saying that where the blank line is should be the start of a new function. There would still be a blank line, just no longer inside the function. Now, maybe you think there should be more blank lines in the above, in which case we'll just have to disagree on that point. -- https://mail.python.org/mailman/listinfo/python-list
Re: Is there an easy way to control indents in Python
On Mon, Oct 20, 2014 at 11:54 AM, Ian Kelly ian.g.ke...@gmail.com wrote: On Mon, Oct 20, 2014 at 9:54 AM, Simon Kennedy sffjun...@gmail.com wrote: Not having ever attempted to go beyond even the basics of Perl, the aspect that causes me to refer to Perl 'dismissively' as well comment in this thread, is that I don't find Perl to be an aesthetically pleasing language and I consider Python functions which have no blank lines in them to be a small step towards Perl. Some people do not like Python's indentation rules but for me it's a large part of what draws me to program in Python. Spaces for indentation and blank lines are both aspects of how I like to program. I write in Python because I like to, not because I have to. I think the only reason I might code a function with no blank lines was if I was programming in a language that using blank lines caused it to run too slowly. So to be clear, I'm not talking about taking a function like this (contrived) example and just removing the blank line: def find_path(graphdata, start, end): edges = map(str.split, lines) graph = collections.defaultdict(list) for node1, node2, weight in edges: graph[node1].append((node[2], int(weight))) graph[node2].append((node[1], int(weight))) open_heap = [(0, (start,))] closed_set = set() while open_heap: cost, path = heapq.heappop(open_heap) current_node = path[-1] if current_node == end: return path if current_node in closed_set: continue for next_node, weight in graph[current_node]: heapq.heappush((cost + weight, path + (next_node,))) closed_set.add(current_node) else: raise ValueError(No path from start to end) Rather, I'm saying that where the blank line is should be the start of a new function. There would still be a blank line, just no longer inside the function. Now, maybe you think there should be more blank lines in the above, in which case we'll just have to disagree on that point. By the way, I didn't test that at all, which is why I've spotted at least two bugs in it since sending the message. -- https://mail.python.org/mailman/listinfo/python-list
Building lists
I haven't had a lot of practice doing this. If anyone knows of a site I would appreciate it. Will Python work like this: I am trying to come up with an example and work to it. Say I want a Grocery list and it will have a maximum size of 50 items. I want to do this with one list. Make a list of 0-50. Then can I add to that list so the second item will hold something like cheese, eggs, milk. Say then I want to add the price of cheese, eggs and milk. Say then I want to add another list of price of cheese, eggs milk from another store. Can this be done starting with just a list of numbers from 0-50? Please no hints, just answer directly how it is done. for store in range (50): print store How can I add to store where it looks like this: (0,cheese, 1,eggs 2,milk , 3-50,blank for now) -- https://mail.python.org/mailman/listinfo/python-list
Re: Building lists
On Monday, October 20, 2014 11:13:17 AM UTC-7, Seymore4Head wrote: I haven't had a lot of practice doing this. If anyone knows of a site I would appreciate it. Will Python work like this: I am trying to come up with an example and work to it. Say I want a Grocery list and it will have a maximum size of 50 items. I want to do this with one list. Make a list of 0-50. Then can I add to that list so the second item will hold something like cheese, eggs, milk. Say then I want to add the price of cheese, eggs and milk. Say then I want to add another list of price of cheese, eggs milk from another store. Can this be done starting with just a list of numbers from 0-50? Please no hints, just answer directly how it is done. for store in range (50): print store How can I add to store where it looks like this: (0,cheese, 1,eggs 2,milk , 3-50,blank for now) Please no hints, just answer directly how it is done. That's pretty rude. We're not going to do your homework for you. -- https://mail.python.org/mailman/listinfo/python-list
Re: Building lists
On Mon, 20 Oct 2014 11:18:26 -0700 (PDT), sohcahto...@gmail.com wrote: On Monday, October 20, 2014 11:13:17 AM UTC-7, Seymore4Head wrote: I haven't had a lot of practice doing this. If anyone knows of a site I would appreciate it. Will Python work like this: I am trying to come up with an example and work to it. Say I want a Grocery list and it will have a maximum size of 50 items. I want to do this with one list. Make a list of 0-50. Then can I add to that list so the second item will hold something like cheese, eggs, milk. Say then I want to add the price of cheese, eggs and milk. Say then I want to add another list of price of cheese, eggs milk from another store. Can this be done starting with just a list of numbers from 0-50? Please no hints, just answer directly how it is done. for store in range (50): print store How can I add to store where it looks like this: (0,cheese, 1,eggs 2,milk , 3-50,blank for now) Please no hints, just answer directly how it is done. That's pretty rude. We're not going to do your homework for you. I said please -- https://mail.python.org/mailman/listinfo/python-list
Re: Building lists
On Monday, October 20, 2014 11:23:36 AM UTC-7, Seymore4Head wrote: On Mon, 20 Oct 2014 11:18:26 -0700 (PDT), sohcahtoa82 wrote: On Monday, October 20, 2014 11:13:17 AM UTC-7, Seymore4Head wrote: I haven't had a lot of practice doing this. If anyone knows of a site I would appreciate it. Will Python work like this: I am trying to come up with an example and work to it. Say I want a Grocery list and it will have a maximum size of 50 items. I want to do this with one list. Make a list of 0-50. Then can I add to that list so the second item will hold something like cheese, eggs, milk. Say then I want to add the price of cheese, eggs and milk. Say then I want to add another list of price of cheese, eggs milk from another store. Can this be done starting with just a list of numbers from 0-50? Please no hints, just answer directly how it is done. for store in range (50): print store How can I add to store where it looks like this: (0,cheese, 1,eggs 2,milk , 3-50,blank for now) Please no hints, just answer directly how it is done. That's pretty rude. We're not going to do your homework for you. I said please Oh shit! It's the magic word! I better get right on it! -- https://mail.python.org/mailman/listinfo/python-list
Re: Is there an easy way to control indents in Python
Ok, new code using ?:
import sqlite3
db = sqlite3.connect('db.sqlite')
def create_db():
db.execute('''
CREATE TABLE TOPICS(
ID INT PRIMARY KEY NOT NULL,
URL VARCHAR NOT NULL,
AUTHOR VARCHAR NOT NULL,
MESSAGE VARCHAR NOT NULL
);
''')
def insert_db(_id, url, author, message):
db.execute(INSERT INTO TOPICS (ID, URL, AUTHOR, MESSAGE) VALUES (?, ?,
?, ?), (_id, url, author, message))
db.commit()
def get_db(_id):
cursor = db.execute(SELECT ID, URL, AUTHOR, MESSAGE FROM TOPICS WHERE ID =
?, (_id))
return cursor.fetchone()
if __name__ == '__main__':
create_db()
insert_db(12, 'abc.com', 'a', 'b')
print(get_db(12))
db.close()
-
But now when I execute I get
Traceback (most recent call last):
File .\sql.py, line 30, in module
print(get_db(12))
File .\sql.py, line 23, in get_db
cursor = db.execute(SELECT ID, URL, AUTHOR, MESSAGE FROM TOPICS WHERE
ID = ?, (_id))
ValueError: parameters are of unsupported type
-
And the second time, again, I get
Traceback (most recent call last):
File .\sql.py, line 28, in module
create_db()
File .\sql.py, line 14, in create_db
''')
sqlite3.OperationalError: table TOPICS already exists
On Mon, Oct 20, 2014 at 3:57 PM, Ian Kelly ian.g.ke...@gmail.com wrote:
On Mon, Oct 20, 2014 at 11:54 AM, Ian Kelly ian.g.ke...@gmail.com wrote:
On Mon, Oct 20, 2014 at 9:54 AM, Simon Kennedy sffjun...@gmail.com
wrote:
Not having ever attempted to go beyond even the basics of Perl, the
aspect that causes me to refer to Perl 'dismissively' as well comment in
this thread, is that I don't find Perl to be an aesthetically pleasing
language and I consider Python functions which have no blank lines in them
to be a small step towards Perl.
Some people do not like Python's indentation rules but for me it's a
large part of what draws me to program in Python. Spaces for indentation
and blank lines are both aspects of how I like to program.
I write in Python because I like to, not because I have to.
I think the only reason I might code a function with no blank lines was
if I was programming in a language that using blank lines caused it to run
too slowly.
So to be clear, I'm not talking about taking a function like this
(contrived) example and just removing the blank line:
def find_path(graphdata, start, end):
edges = map(str.split, lines)
graph = collections.defaultdict(list)
for node1, node2, weight in edges:
graph[node1].append((node[2], int(weight)))
graph[node2].append((node[1], int(weight)))
open_heap = [(0, (start,))]
closed_set = set()
while open_heap:
cost, path = heapq.heappop(open_heap)
current_node = path[-1]
if current_node == end:
return path
if current_node in closed_set:
continue
for next_node, weight in graph[current_node]:
heapq.heappush((cost + weight, path + (next_node,)))
closed_set.add(current_node)
else:
raise ValueError(No path from start to end)
Rather, I'm saying that where the blank line is should be the start of
a new function. There would still be a blank line, just no longer
inside the function.
Now, maybe you think there should be more blank lines in the above, in
which case we'll just have to disagree on that point.
By the way, I didn't test that at all, which is why I've spotted at
least two bugs in it since sending the message.
--
https://mail.python.org/mailman/listinfo/python-list
--
https://mail.python.org/mailman/listinfo/python-list
Re: Building lists
On 2014-10-20 19:10, Seymore4Head wrote: I haven't had a lot of practice doing this. If anyone knows of a site I would appreciate it. Will Python work like this: I am trying to come up with an example and work to it. Say I want a Grocery list and it will have a maximum size of 50 items. I want to do this with one list. Make a list of 0-50. Then can I add to that list so the second item will hold something like cheese, eggs, milk. Say then I want to add the price of cheese, eggs and milk. Say then I want to add another list of price of cheese, eggs milk from another store. Can this be done starting with just a list of numbers from 0-50? Please no hints, just answer directly how it is done. for store in range (50): print store How can I add to store where it looks like this: (0,cheese, 1,eggs 2,milk , 3-50,blank for now) The grocery list would be a list of the things you want to buy. There are a number of stores, so that would be a list of stores. For each store you want the price of each item, so that would be a dict where the key is the item and the value is the price of that item. That means it would be a list of dicts. Does that help? -- https://mail.python.org/mailman/listinfo/python-list
Re: Is there an easy way to control indents in Python
On Mon, Oct 20, 2014 at 1:04 PM, Juan Christian juan0christ...@gmail.com wrote: Ok, new code using ?: I suspect you meant to post this to some other thread. def get_db(_id): cursor = db.execute(SELECT ID, URL, AUTHOR, MESSAGE FROM TOPICS WHERE ID = ?, (_id)) return cursor.fetchone() (_id) is not a tuple; it's just a parenthesized variable name. To create a one-element tuple you need a trailing comma: (_id,) Remember that with the exception of the empty tuple (), tuples are created by commas, not parentheses. -- https://mail.python.org/mailman/listinfo/python-list
Re: Is there an easy way to control indents in Python
On 2014-10-20 20:04, Juan Christian wrote:
Ok, new code using ?:
import sqlite3
db = sqlite3.connect('db.sqlite')
def create_db():
db.execute('''
CREATE TABLE TOPICS(
ID INT PRIMARY KEY NOT NULL,
URL VARCHAR NOT NULL,
AUTHOR VARCHAR NOT NULL,
MESSAGE VARCHAR NOT NULL
);
''')
def insert_db(_id, url, author, message):
db.execute(INSERT INTO TOPICS (ID, URL, AUTHOR, MESSAGE) VALUES
(?, ?, ?, ?), (_id, url, author, message))
db.commit()
def get_db(_id):
cursor = db.execute(SELECT ID, URL, AUTHOR, MESSAGE FROM TOPICS WHERE
ID = ?, (_id))
return cursor.fetchone()
if __name__ == '__main__':
create_db()
insert_db(12, 'abc.com http://abc.com', 'a', 'b')
print(get_db(12))
db.close()
-
But now when I execute I get
Traceback (most recent call last):
File .\sql.py, line 30, in module
print(get_db(12))
File .\sql.py, line 23, in get_db
cursor = db.execute(SELECT ID, URL, AUTHOR, MESSAGE FROM TOPICS
WHERE ID = ?, (_id))
ValueError: parameters are of unsupported type
-
I'm not certain, but I think that the SQL type is called INTEGER, not
INT.
And the second time, again, I get
Traceback (most recent call last):
File .\sql.py, line 28, in module
create_db()
File .\sql.py, line 14, in create_db
''')
sqlite3.OperationalError: table TOPICS already exists
That's because you created the table the last time you ran it.
--
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Re: Building lists
On Mon, 20 Oct 2014 20:40:18 +0100, MRAB pyt...@mrabarnett.plus.com wrote: On 2014-10-20 19:10, Seymore4Head wrote: I haven't had a lot of practice doing this. If anyone knows of a site I would appreciate it. Will Python work like this: I am trying to come up with an example and work to it. Say I want a Grocery list and it will have a maximum size of 50 items. I want to do this with one list. Make a list of 0-50. Then can I add to that list so the second item will hold something like cheese, eggs, milk. Say then I want to add the price of cheese, eggs and milk. Say then I want to add another list of price of cheese, eggs milk from another store. Can this be done starting with just a list of numbers from 0-50? Please no hints, just answer directly how it is done. for store in range (50): print store How can I add to store where it looks like this: (0,cheese, 1,eggs 2,milk , 3-50,blank for now) The grocery list would be a list of the things you want to buy. There are a number of stores, so that would be a list of stores. For each store you want the price of each item, so that would be a dict where the key is the item and the value is the price of that item. That means it would be a list of dicts. Does that help? No. I am pretty new to Python. For starters I would like to know if you can make a single item list and then turn it into a 2 item list. Is there a command for that? Do you have to know the number of items the list will have before making it? -- https://mail.python.org/mailman/listinfo/python-list
Re: Building lists
On 20/10/2014 19:33, sohcahto...@gmail.com wrote: Oh shit! It's the magic word! I better get right on it! While you're at it would you please access this list via https://mail.python.org/mailman/listinfo/python-list or read and action this https://wiki.python.org/moin/GoogleGroupsPython to prevent us seeing double line spacing and single line paragraphs, thanks. -- My fellow Pythonistas, ask not what our language can do for you, ask what you can do for our language. Mark Lawrence -- https://mail.python.org/mailman/listinfo/python-list
Re: Building lists
On Mon, Oct 20, 2014 at 1:49 PM, Seymore4Head
Seymore4Head@hotmail.invalid wrote:
For starters I would like to know if you can make a single item list
and then turn it into a 2 item list. Is there a command for that?
You mean like this?
the_list = ['first_item']
the_list.append('second_item')
the_list
['first_item', 'second_item']
--
https://mail.python.org/mailman/listinfo/python-list
Re: Building lists
On 20/10/2014 20:49, Seymore4Head wrote: On Mon, 20 Oct 2014 20:40:18 +0100, MRAB pyt...@mrabarnett.plus.com wrote: On 2014-10-20 19:10, Seymore4Head wrote: I haven't had a lot of practice doing this. If anyone knows of a site I would appreciate it. Will Python work like this: I am trying to come up with an example and work to it. Say I want a Grocery list and it will have a maximum size of 50 items. I want to do this with one list. Make a list of 0-50. Then can I add to that list so the second item will hold something like cheese, eggs, milk. Say then I want to add the price of cheese, eggs and milk. Say then I want to add another list of price of cheese, eggs milk from another store. Can this be done starting with just a list of numbers from 0-50? Please no hints, just answer directly how it is done. for store in range (50): print store How can I add to store where it looks like this: (0,cheese, 1,eggs 2,milk , 3-50,blank for now) The grocery list would be a list of the things you want to buy. There are a number of stores, so that would be a list of stores. For each store you want the price of each item, so that would be a dict where the key is the item and the value is the price of that item. That means it would be a list of dicts. Does that help? No. I am pretty new to Python. For starters I would like to know if you can make a single item list and then turn it into a 2 item list. Is there a command for that? Do you have to know the number of items the list will have before making it? Python doesn't have commands and no. Perhaps you'd care to (re)read the tutorial. -- My fellow Pythonistas, ask not what our language can do for you, ask what you can do for our language. Mark Lawrence -- https://mail.python.org/mailman/listinfo/python-list
Re: Building lists
On Mon, 20 Oct 2014 20:57:52 +0100, Mark Lawrence breamore...@yahoo.co.uk wrote: On 20/10/2014 20:49, Seymore4Head wrote: On Mon, 20 Oct 2014 20:40:18 +0100, MRAB pyt...@mrabarnett.plus.com wrote: On 2014-10-20 19:10, Seymore4Head wrote: I haven't had a lot of practice doing this. If anyone knows of a site I would appreciate it. Will Python work like this: I am trying to come up with an example and work to it. Say I want a Grocery list and it will have a maximum size of 50 items. I want to do this with one list. Make a list of 0-50. Then can I add to that list so the second item will hold something like cheese, eggs, milk. Say then I want to add the price of cheese, eggs and milk. Say then I want to add another list of price of cheese, eggs milk from another store. Can this be done starting with just a list of numbers from 0-50? Please no hints, just answer directly how it is done. for store in range (50): print store How can I add to store where it looks like this: (0,cheese, 1,eggs 2,milk , 3-50,blank for now) The grocery list would be a list of the things you want to buy. There are a number of stores, so that would be a list of stores. For each store you want the price of each item, so that would be a dict where the key is the item and the value is the price of that item. That means it would be a list of dicts. Does that help? No. I am pretty new to Python. For starters I would like to know if you can make a single item list and then turn it into a 2 item list. Is there a command for that? Do you have to know the number of items the list will have before making it? Python doesn't have commands and no. Perhaps you'd care to (re)read the tutorial. Thank you -- https://mail.python.org/mailman/listinfo/python-list
Re: Building lists
On Mon, 20 Oct 2014 13:58:46 -0600, Ian Kelly ian.g.ke...@gmail.com
wrote:
On Mon, Oct 20, 2014 at 1:49 PM, Seymore4Head
Seymore4Head@hotmail.invalid wrote:
For starters I would like to know if you can make a single item list
and then turn it into a 2 item list. Is there a command for that?
You mean like this?
the_list = ['first_item']
the_list.append('second_item')
the_list
['first_item', 'second_item']
a=(1,2,3)
b=(Red, Green, Blue)
c=(a.b,c)
d=(1,red,a 2,green,b 3,blue,c)
Something like that.
--
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Women's Rights in Islam
Women's Rights in Islam Islam is the sole religion that gave women her rights, these are so many and recorded in the Quran verses and the traditional sayings of the prophet, these rights are condensed in points here as holy texts, if all written, will take many pages. Equality between man and women Islam acquits Eve from the original Sin which lived through generation and women have to bear it. In Quran God has remitted this sin the moment it was committed. Women have the same spiritual status as men in the eye of God. Female Embryo's rights A female embryo, like a male embryo, should be guarded against hereditary disease. Females' rights in infantry While in other religions the birth of a female is not always welcome, the birth of a female is celebrated in Islam. Females like males should be given beautiful names. Females like males are to be given love while still children without any preference of one sex over another as stated in the prophet's hadith. Islam is against denigrating females in any way especially killing them during their infantry- an old custom practiced by the pagan Arabs. Rights of Females over Parents Females are to receive the due care and be brought up in the best way( God's reward for this is shielding parents against the hellfire and raising their ranks high up to that of the prophet as stated in the hadiths). Even Female slaves are to be taught, this is doubly rewarded by God. Teaching females is mandatory in Islam. A female(married or unmarried) has the right to inherit her father, mother, husband , her children, sisters and daughters( Note that Females in Judeo-Christianity inherit only from their parents in case no brothers are found) A female is not to be killed in wars. A female chastity is to be given high care. Parents should not favor sons over daughters A woman has the right to argue with men even with the prophet himself. Women are equal to men as stated in the hadith Women are sisters to men. A woman, just like a man, can give someone the right of refuge and security among the Muslims. Rights of Wives A female has the right to choose her husband. A wife has the right to manage her property and the husband should not take any of her property. A wife is not responsible for spending on her family, it is not allowed for a husband to take a penny from her property. A wife has the full right to her dowry ( The husband is not to take any from it ) A wife can divorce herself if she doesn't like her husband. A husband is responsible for feeding, dwelling, taking the utmost care of his wife to the extent that raising a piece of bread to a wife's mouth will be rewarded by God) A wife should be given her full right in bed and even such an act is rewarded by God because the husband and the wife are sinners if they commit adultery. During menses, contrary to the holy Book, a woman can live among her family members and whoever touches her remains clean. The best among the Muslims are those who are good to their wives. As a Mother To show how important is the obedience of mothers the prophet says paradise is under the feet of mothers. Though both the father and the mother are to be given the utmost care, a mother should be always at the top priority. Mothers should always be given due care from her children A son must not prefer his wife to his mother under any circumstances. A Muslim should ask for his parent permission before joining the Muslim army, which is engaged in fighting. Caring about parents is more preferred to fighting in the cause of God, if they are old and need care. A mother, like father, is to be given the utmost care and be obeyed even if she is not a Muslim. The rights of the divorced woman in Islam The Faith of Islam has ordained certain financial and social obligations in the event of divorce, so as to discourage people from resorting to it. Islam ordains that when a man divorces his wife, he must pay her the delayed dowry agreed upon in the marriage contract, in addition to the expense of her maintenance of food, drink and living quarters for a certain period of time, known as the iddat . The custody of the children is granted to the mother until they grow up. In the event of her death or inability to look after her children, the custody of her children is granted to her relations. The husband is legally and religiously charged with his children's financial maintenance, and for wet nurses to breast feed them even if their mother breast feeds them herself, as is stated in the following Quranic verse And if they suckle your (offspring) give them their recompense [1][12] Rights of a widow The whole of the Islamic society is responsible for
Re: Building lists
On Mon, Oct 20, 2014 at 2:23 PM, Seymore4Head
Seymore4Head@hotmail.invalid wrote:
On Mon, 20 Oct 2014 13:58:46 -0600, Ian Kelly ian.g.ke...@gmail.com
wrote:
On Mon, Oct 20, 2014 at 1:49 PM, Seymore4Head
Seymore4Head@hotmail.invalid wrote:
For starters I would like to know if you can make a single item list
and then turn it into a 2 item list. Is there a command for that?
You mean like this?
the_list = ['first_item']
the_list.append('second_item')
the_list
['first_item', 'second_item']
a=(1,2,3)
b=(Red, Green, Blue)
c=(a.b,c)
d=(1,red,a 2,green,b 3,blue,c)
Something like that.
Those are tuples, not lists. Are you trying to create a list of tuples
from a, b, and c? If so, then zip does what you want:
d = list(zip(a, b, c))
d
[(1, 'Red', 'a'), (2, 'Green', 'b'), (3, 'Blue', 'c')]
Or do you want all those elements merged into a single list?
d = list(sum(zip(a, b, c), ()))
d
[1, 'Red', 'a', 2, 'Green', 'b', 3, 'Blue', 'c']
--
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Re: Building lists
In obja4a5ij57rtuaivtvcuqsufhuhk3a...@4ax.com Seymore4Head
Seymore4Head@Hotmail.invalid writes:
Will Python work like this:
Python is a capable general-purpose language, so yes, it can pretty
much do anything you want. The trick is knowing how to do it.
Make a list of 0-50.
Then can I add to that list so the second item will hold something
like cheese, eggs, milk.
You want one item to have cheese, eggs, and milk? What's the point
of calling it one item if it holds three things?
Say then I want to add the price of cheese, eggs and milk.
Say then I want to add another list of price of cheese, eggs milk from
another store.
Can this be done starting with just a list of numbers from 0-50?
Please no hints, just answer directly how it is done.
Each list item could be a tuple consisting of the item name and a dict
containing the item's price at various stores, for example:
# start with an empty list
shopping_list = []
# make a 'cheese' item
cheese = ('Cheese', { 'Walmart' : 5.00,
'Publix': 5.50,
'Costco': 4.99 } )
# add cheese to the shopping list
shopping_list.append(cheese)
--
John Gordon Imagine what it must be like for a real medical doctor to
gor...@panix.comwatch 'House', or a real serial killer to watch 'Dexter'.
--
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Re: Building lists
On 20/10/2014 21:23, Seymore4Head wrote:
On Mon, 20 Oct 2014 13:58:46 -0600, Ian Kelly ian.g.ke...@gmail.com
wrote:
On Mon, Oct 20, 2014 at 1:49 PM, Seymore4Head
Seymore4Head@hotmail.invalid wrote:
For starters I would like to know if you can make a single item list
and then turn it into a 2 item list. Is there a command for that?
You mean like this?
the_list = ['first_item']
the_list.append('second_item')
the_list
['first_item', 'second_item']
a=(1,2,3)
b=(Red, Green, Blue)
c=(a.b,c)
d=(1,red,a 2,green,b 3,blue,c)
Something like that.
https://docs.python.org/3/library/functions.html#zip
--
My fellow Pythonistas, ask not what our language can do for you, ask
what you can do for our language.
Mark Lawrence
--
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Re: Building lists
On Mon, 20 Oct 2014 14:45:19 -0600, Ian Kelly ian.g.ke...@gmail.com
wrote:
On Mon, Oct 20, 2014 at 2:23 PM, Seymore4Head
Seymore4Head@hotmail.invalid wrote:
On Mon, 20 Oct 2014 13:58:46 -0600, Ian Kelly ian.g.ke...@gmail.com
wrote:
On Mon, Oct 20, 2014 at 1:49 PM, Seymore4Head
Seymore4Head@hotmail.invalid wrote:
For starters I would like to know if you can make a single item list
and then turn it into a 2 item list. Is there a command for that?
You mean like this?
the_list = ['first_item']
the_list.append('second_item')
the_list
['first_item', 'second_item']
a=(1,2,3)
b=(Red, Green, Blue)
c=(a.b,c)
d=(1,red,a 2,green,b 3,blue,c)
Something like that.
Those are tuples, not lists. Are you trying to create a list of tuples
from a, b, and c? If so, then zip does what you want:
d = list(zip(a, b, c))
d
[(1, 'Red', 'a'), (2, 'Green', 'b'), (3, 'Blue', 'c')]
Or do you want all those elements merged into a single list?
d = list(sum(zip(a, b, c), ()))
d
[1, 'Red', 'a', 2, 'Green', 'b', 3, 'Blue', 'c']
I am not sure really. I know I need more practice, but I haven't
found a reliable way to find practice problems.
Thank you
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Re: Building lists
On Mon, 20 Oct 2014 20:48:54 + (UTC), John Gordon
gor...@panix.com wrote:
In obja4a5ij57rtuaivtvcuqsufhuhk3a...@4ax.com Seymore4Head
Seymore4Head@Hotmail.invalid writes:
Will Python work like this:
Python is a capable general-purpose language, so yes, it can pretty
much do anything you want. The trick is knowing how to do it.
Make a list of 0-50.
Then can I add to that list so the second item will hold something
like cheese, eggs, milk.
You want one item to have cheese, eggs, and milk? What's the point
of calling it one item if it holds three things?
Say then I want to add the price of cheese, eggs and milk.
Say then I want to add another list of price of cheese, eggs milk from
another store.
Can this be done starting with just a list of numbers from 0-50?
Please no hints, just answer directly how it is done.
Each list item could be a tuple consisting of the item name and a dict
containing the item's price at various stores, for example:
# start with an empty list
shopping_list = []
# make a 'cheese' item
cheese = ('Cheese', { 'Walmart' : 5.00,
'Publix': 5.50,
'Costco': 4.99 } )
# add cheese to the shopping list
shopping_list.append(cheese)
The thing is I am not really sure what I want. I do know I need more
practice to find out. Since I am taking a course now, I can't really
ask a direct question and my first example wasn't so good.
I think what I am going to have to have is a master list that keeps
track of several things and I will need to change some of them so I
know that rules out tuples.
I need more practice examples with indexing and don't know where to
find it.
Thanks
It is hard to ask questions when you don't know all the terms yet. I
also know that makes it even harder for you guys to answer them. :)
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Re: Building lists
On Mon, Oct 20, 2014 at 3:25 PM, Seymore4Head Seymore4Head@hotmail.invalid wrote: I think what I am going to have to have is a master list that keeps track of several things and I will need to change some of them so I know that rules out tuples. It sounds to me like what you really want is a list of class instances. Define a class to contain the properties that you want to have for one item in the list. Then create a list to contain multiple instances of that class. -- https://mail.python.org/mailman/listinfo/python-list
Re: Building lists
Seymore4Head wrote: Say I want a Grocery list and it will have a maximum size of 50 items. In Python it's actually easier to deal with variable-sized lists having no maximum size. Instead of pre-creating a list of a given size, just start with an empty list and append things to it. Unless there's some external reason for a size limit (e.g. you can't fit more than 50 items in your shopping bag) there's no need to impose limit at all. You should certainly start without a limit and only add it later if needed. Some things to get you started: items = [] # Start with an empty list items.append(cheese) # Add some items to it items.append(eggs) items.append(milk) for item in items: # Process the items print(item) If you really need to limit the number of items, you can do something like this: def add_item(item): if len(items) 50: items.append(item) else: raise Exception(Shopping list is full) -- Greg -- https://mail.python.org/mailman/listinfo/python-list
Re: Flush stdin
On Sun, Oct 19, 2014 at 9:45 PM, Marko Rauhamaa ma...@pacujo.net wrote: I found this comment in CPython's source code (pythonrun.c): /* stdin is always opened in buffered mode, first because it shouldn't make a difference in common use cases, second because TextIOWrapper depends on the presence of a read1() method which only exists on buffered streams. */ The solution is to use os.read(). Seriously? -- https://mail.python.org/mailman/listinfo/python-list
Re: Building lists
On Tue, 21 Oct 2014 10:54:55 +1300, Gregory Ewing greg.ew...@canterbury.ac.nz wrote: Seymore4Head wrote: Say I want a Grocery list and it will have a maximum size of 50 items. In Python it's actually easier to deal with variable-sized lists having no maximum size. Instead of pre-creating a list of a given size, just start with an empty list and append things to it. Unless there's some external reason for a size limit (e.g. you can't fit more than 50 items in your shopping bag) there's no need to impose limit at all. You should certainly start without a limit and only add it later if needed. Some things to get you started: items = [] # Start with an empty list items.append(cheese) # Add some items to it items.append(eggs) items.append(milk) for item in items: # Process the items print(item) If you really need to limit the number of items, you can do something like this: def add_item(item): if len(items) 50: items.append(item) else: raise Exception(Shopping list is full) Thanks. -- https://mail.python.org/mailman/listinfo/python-list
Re: Is there an easy way to control indents in Python
Sorry guys, my post about SQL was not meant to be here!!!
On Mon, Oct 20, 2014 at 5:43 PM, MRAB pyt...@mrabarnett.plus.com wrote:
On 2014-10-20 20:04, Juan Christian wrote:
Ok, new code using ?:
import sqlite3
db = sqlite3.connect('db.sqlite')
def create_db():
db.execute('''
CREATE TABLE TOPICS(
ID INT PRIMARY KEY NOT NULL,
URL VARCHAR NOT NULL,
AUTHOR VARCHAR NOT NULL,
MESSAGE VARCHAR NOT NULL
);
''')
def insert_db(_id, url, author, message):
db.execute(INSERT INTO TOPICS (ID, URL, AUTHOR, MESSAGE) VALUES
(?, ?, ?, ?), (_id, url, author, message))
db.commit()
def get_db(_id):
cursor = db.execute(SELECT ID, URL, AUTHOR, MESSAGE FROM TOPICS WHERE
ID = ?, (_id))
return cursor.fetchone()
if __name__ == '__main__':
create_db()
insert_db(12, 'abc.com http://abc.com', 'a', 'b')
print(get_db(12))
db.close()
-
But now when I execute I get
Traceback (most recent call last):
File .\sql.py, line 30, in module
print(get_db(12))
File .\sql.py, line 23, in get_db
cursor = db.execute(SELECT ID, URL, AUTHOR, MESSAGE FROM TOPICS
WHERE ID = ?, (_id))
ValueError: parameters are of unsupported type
-
I'm not certain, but I think that the SQL type is called INTEGER, not
INT.
And the second time, again, I get
Traceback (most recent call last):
File .\sql.py, line 28, in module
create_db()
File .\sql.py, line 14, in create_db
''')
sqlite3.OperationalError: table TOPICS already exists
That's because you created the table the last time you ran it.
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Re: Building lists
On Mon, 20 Oct 2014 20:40:18 +0100, MRAB wrote:
There are a number of stores, so that would be a list of stores. For
each store you want the price of each item, so that would be a dict
where the key is the item and the value is the price of that item. That
means it would be a list of dicts.
Does that help?
It think it would be a dict of dicts:
shopping = { store1 : { item1: price1, item2: price2, ... },
store2 : { item3: price3, item4: price4, ... }, ... }
--
Denis McMahon, denismfmcma...@gmail.com
--
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Re: Building lists
On Mon, 20 Oct 2014 15:49:15 -0400, Seymore4Head wrote:
For starters I would like to know if you can make a single item list and
then turn it into a 2 item list. Is there a command for that?
Yes, it's called assignment. You can for example change a member of a
list from an string to a tuple such as ( string, number ):
x = [ fred, jim, susan ]
x[x.index(jim)] = ( jim, 11, )
print x
['fred', ('jim', 11), 'susan']
Do you have to know the number of items the list will have before making
it?
No. See the append() method of the list object.
--
Denis McMahon, denismfmcma...@gmail.com
--
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Re: Building lists
On Mon, 20 Oct 2014 22:40:50 + (UTC), Denis McMahon
denismfmcma...@gmail.com wrote:
On Mon, 20 Oct 2014 15:49:15 -0400, Seymore4Head wrote:
For starters I would like to know if you can make a single item list and
then turn it into a 2 item list. Is there a command for that?
Yes, it's called assignment. You can for example change a member of a
list from an string to a tuple such as ( string, number ):
x = [ fred, jim, susan ]
x[x.index(jim)] = ( jim, 11, )
print x
['fred', ('jim', 11), 'susan']
Do you have to know the number of items the list will have before making
it?
No. See the append() method of the list object.
Thanks
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Re: Flush stdin
If I run the following in one tty: nc -l localhost 9000 | /tmp/z ...where /tmp/z has just: #!/usr/bin/python3 import sys for line in sys.stdin.buffer: print(line) And then run the following in another tty on the same computer: while read line; do echo $line; sleep 1; done /etc/passwd | nc localhost 9000 ...then everything acts line buffered, or perhaps even character buffered (the two are pretty indistinguishable in this test). What I see is my /etc/passwd file popping out of the nc -l side, one line at a time, each line one second apart. I suppose this suggests that it's the client that's sending TCP data that is buffering. That, or we're using two different versions of netcat (there are at least two available). -- https://mail.python.org/mailman/listinfo/python-list
Re: Flush stdin
Dan Stromberg drsali...@gmail.com: On Sun, Oct 19, 2014 at 9:45 PM, Marko Rauhamaa ma...@pacujo.net wrote: I found this comment in CPython's source code (pythonrun.c): /* stdin is always opened in buffered mode, first because it shouldn't make a difference in common use cases, second because TextIOWrapper depends on the presence of a read1() method which only exists on buffered streams. */ The solution is to use os.read(). Seriously? I wasn't joking. Marko -- https://mail.python.org/mailman/listinfo/python-list
Re: Building lists
On 2014-10-20 23:30, Denis McMahon wrote:
On Mon, 20 Oct 2014 20:40:18 +0100, MRAB wrote:
There are a number of stores, so that would be a list of stores. For
each store you want the price of each item, so that would be a dict
where the key is the item and the value is the price of that item. That
means it would be a list of dicts.
Does that help?
It think it would be a dict of dicts:
shopping = { store1 : { item1: price1, item2: price2, ... },
store2 : { item3: price3, item4: price4, ... }, ... }
The OP never said that the stores have names! :-)
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Re: Flush stdin
Dan Stromberg drsali...@gmail.com:
...then everything acts line buffered, or perhaps even character
buffered [...]
That, or we're using two different versions of netcat (there are at
least two available).
Let's unconfuse the issue a bit. I'll take line buffering, netcat and
the OS out of the picture.
Here's a character generator (test.sh):
while : ; do
echo -n x
sleep 1
done
and here's a character sink (test.py):
import sys
while True:
c = sys.stdin.read(1)
if not c:
break
print(ord(c[0]))
Then, I run:
$ bash ./test.sh | python3 ./test.py
120
120
120
120
The lines are output at one-second intervals.
That demonstrates that sys.stdin.read(1) does not block for more than
one character. IOW, there is no buffering whatsoever.
If I change the sink a bit: c = sys.stdin.read(5), I get the same
output but at five-second intervals indicating that sys.stdin.read()
calls the underlying os.read() function five times before returning. In
fact, that conclusion is made explicit by running:
$ bash ./test.sh | strace python3 ./test.py
...
read(0, x, 4096) = 1
read(0, x, 4096) = 1
read(0, x, 4096) = 1
read(0, x, 4096) = 1
read(0, x, 4096) = 1
fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 3), ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f3143bab000
write(1, 120\n, 4120
)= 4
...
If I modify test.py to call os.read():
import os
while True:
c = os.read(0, 5)
if not c:
break
print(ord(c[0]))
The output is again printed at one-second intervals: no buffering.
Thus, we are back at my suggestion: use os.read() if you don't want
Python to buffer stdin for you.
Marko
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Simple import in python 3 errors with complaint about bytes
I'm modifying an extension written with the c-api to have a datatype of quaternions https://github.com/moble/numpy_quaternion, with one of the goals being python 3 support. It works nicely in python 2.7, but for python 3.x gives an error that I can't find anywhere on the google. The directory looks like this: .../site-packages/ quaternion/ __init__.py numpy_quaternion.so __init__.py contains a line like this: from .numpy_quaternion import quaternion But when it hits that line, python 3 throws its hands up in disgust: python -c 'import quaternion' Traceback (most recent call last): File string, line 1, in module File /Users/mynamehere/.continuum/anaconda/envs/py3k/lib/python3.4/site-packages/quaternion/__init__.py, line 3, in module from .numpy_quaternion import quaternion TypeError: __import__() argument 1 must be str, not bytes The only thing before that line is `import numpy as np`, which typically works just fine. Obviously, I'm using python3.4 to compile and (attempt to) import (with a conda environment), so it's not something as dumb as using the wrong python. Also, this is the result for both me on my laptop and Travis-CI https://travis-ci.org/moble/numpy_quaternion, so it doesn't seem to be anything peculiar to my installation. I've posted this question on stackoverflow, but haven't gotten much interest; the only responder suggested I ask here instead. Any ideas what's going wrong, or where I can go from here? Thanks, Mike -- https://mail.python.org/mailman/listinfo/python-list
Re: Simple import in python 3 errors with complaint about bytes
Are you perhaps doing an import inside of the C code? Chris On Mon, Oct 20, 2014 at 4:29 PM, Mike Boyle moboyl...@outlook.com wrote: I'm modifying an extension written with the c-api to have a datatype of quaternions https://github.com/moble/numpy_quaternion, with one of the goals being python 3 support. It works nicely in python 2.7, but for python 3.x gives an error that I can't find anywhere on the google. The directory looks like this: .../site-packages/ quaternion/ __init__.py numpy_quaternion.so __init__.py contains a line like this: from .numpy_quaternion import quaternion But when it hits that line, python 3 throws its hands up in disgust: python -c 'import quaternion' Traceback (most recent call last): File string, line 1, in module File /Users/mynamehere/.continuum/anaconda/envs/py3k/lib/python3.4/site-packages/quaternion/__init__.py, line 3, in module from .numpy_quaternion import quaternion TypeError: __import__() argument 1 must be str, not bytes The only thing before that line is `import numpy as np`, which typically works just fine. Obviously, I'm using python3.4 to compile and (attempt to) import (with a conda environment), so it's not something as dumb as using the wrong python. Also, this is the result for both me on my laptop and Travis-CI https://travis-ci.org/moble/numpy_quaternion, so it doesn't seem to be anything peculiar to my installation. I've posted this question on stackoverflow, but haven't gotten much interest; the only responder suggested I ask here instead. Any ideas what's going wrong, or where I can go from here? Thanks, Mike -- https://mail.python.org/mailman/listinfo/python-list -- https://mail.python.org/mailman/listinfo/python-list
Re: Simple import in python 3 errors with complaint about bytes
On Mon, Oct 20, 2014 at 5:29 PM, Mike Boyle moboyl...@outlook.com wrote:
I'm modifying an extension written with the c-api to have a datatype of
quaternions https://github.com/moble/numpy_quaternion, with one of the
goals being python 3 support. It works nicely in python 2.7, but for python
3.x gives an error that I can't find anywhere on the google. The directory
looks like this:
.../site-packages/
quaternion/
__init__.py
numpy_quaternion.so
__init__.py contains a line like this:
from .numpy_quaternion import quaternion
But when it hits that line, python 3 throws its hands up in disgust:
python -c 'import quaternion'
Traceback (most recent call last):
File string, line 1, in module
File
/Users/mynamehere/.continuum/anaconda/envs/py3k/lib/python3.4/site-packages/quaternion/__init__.py,
line 3, in module
from .numpy_quaternion import quaternion
TypeError: __import__() argument 1 must be str, not bytes
The only thing before that line is `import numpy as np`, which typically
works just fine. Obviously, I'm using python3.4 to compile and (attempt to)
import (with a conda environment), so it's not something as dumb as using the
wrong python. Also, this is the result for both me on my laptop and
Travis-CI https://travis-ci.org/moble/numpy_quaternion, so it doesn't seem
to be anything peculiar to my installation. I've posted this question on
stackoverflow, but haven't gotten much interest; the only responder suggested
I ask here instead.
Any ideas what's going wrong, or where I can go from here?
I question whether the error is really coming from that particular
import line. Try shadowing the __import__ function to see what's
actually being passed there. E.g.:
orig_import = __import__
def debug_import(name, globals=None, locals=None, fromlist=(), level=0):
... print(debug_import:, name, globals, locals, fromlist, level)
... return orig_import(name, globals, locals, fromlist, level)
...
import builtins
builtins.__import__ = debug_import
import sys
debug_import: sys {'__spec__': None, '__loader__': class
'_frozen_importlib.BuiltinImporter', '__package__': None, 'builtins':
module 'builtins' (built-in), 'orig_import': built-in function
__import__, '__builtins__': module 'builtins' (built-in),
'__name__': '__main__', '__doc__': None, 'debug_import': function
debug_import at 0x7f6096aac9d8} {'__spec__': None, '__loader__':
class '_frozen_importlib.BuiltinImporter', '__package__': None,
'builtins': module 'builtins' (built-in), 'orig_import': built-in
function __import__, '__builtins__': module 'builtins' (built-in),
'__name__': '__main__', '__doc__': None, 'debug_import': function
debug_import at 0x7f6096aac9d8} None 0
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Re: Simple import in python 3 errors with complaint about bytes
On Tue, Oct 21, 2014 at 10:29 AM, Mike Boyle moboyl...@outlook.com wrote: But when it hits that line, python 3 throws its hands up in disgust: python -c 'import quaternion' Just something crazy to try: Instead of using python -c, create an actual script with just that one line in it. It might be that you have some strange console config that's causing problems. You may also want to try changing all your names to be unique (quaternion1 as the package name, quaternion2 as the Python file in it, etc), which should tell you which one it's actually failing on. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
Re: Building lists
Seymore4Head wrote: For starters I would like to know if you can make a single item list and then turn it into a 2 item list. Is there a command for that? Do you have to know the number of items the list will have before making it? Now these are the right sort of questions that you should be asking! They are concrete and tightly focused, not vague and so broad that they could mean anything, and they invite a concrete answer rather than hints. First question: can you take a single list item and turn it into a 2-item list? Yes, you can, you can turn a single list item into *anything*, including deleting it. Start with a list, and remember that lists are indexed starting with 0: py alist = [1, 2, 4, 8, 16, 32, 64] py alist[0] = hello! py alist[1] = [a, b, c] py del alist[4] py print(alist) ['hello!', ['a', 'b', 'c'], 4, 8, 32, 64] Second question: do you need to know the number of items in a list in advance? No. You can add additional items to an existing list with the append() method: py import random py alist = [] py while random.random() 0.5: ... alist.append(spam) ... py print(alist) ['spam', 'spam'] Because this is random, if you try it you will get an unpredictable number of spam words in the list. About half the time it will contain no words at all, about a quarter of the time it will contain a single word, an eighth of the time it will contain two words, and so forth. -- Steven -- https://mail.python.org/mailman/listinfo/python-list
Re: Building lists
On Tue, 21 Oct 2014 10:55:08 +1100, Steven D'Aprano steve+comp.lang.pyt...@pearwood.info wrote: Seymore4Head wrote: For starters I would like to know if you can make a single item list and then turn it into a 2 item list. Is there a command for that? Do you have to know the number of items the list will have before making it? Now these are the right sort of questions that you should be asking! They are concrete and tightly focused, not vague and so broad that they could mean anything, and they invite a concrete answer rather than hints. First question: can you take a single list item and turn it into a 2-item list? Yes, you can, you can turn a single list item into *anything*, including deleting it. Start with a list, and remember that lists are indexed starting with 0: py alist = [1, 2, 4, 8, 16, 32, 64] py alist[0] = hello! py alist[1] = [a, b, c] py del alist[4] py print(alist) ['hello!', ['a', 'b', 'c'], 4, 8, 32, 64] Second question: do you need to know the number of items in a list in advance? No. You can add additional items to an existing list with the append() method: py import random py alist = [] py while random.random() 0.5: ... alist.append(spam) ... py print(alist) ['spam', 'spam'] Because this is random, if you try it you will get an unpredictable number of spam words in the list. About half the time it will contain no words at all, about a quarter of the time it will contain a single word, an eighth of the time it will contain two words, and so forth. Thanks -- https://mail.python.org/mailman/listinfo/python-list
RE: Simple import in python 3 errors with complaint about bytes
Ah, yes. Thanks to that clever import debug hack, and the suggestion that it
would actually be an import within the module causing the trouble, I managed to
track it down. I had tried copying some py3k changes from the rational
module in numpy/numpy-dtypes, but evidently didn't do it right, or it just
doesn't work. I was using `PyImport_Import` with a PyString. Now, going back
to the original `PyImport_ImportModule` with a literal `char*`, everything
seems to work great (for me at least; Travis isn't so sure...).
Thanks very much!
From: ian.g.ke...@gmail.com
Date: Mon, 20 Oct 2014 17:48:23 -0600
Subject: Re: Simple import in python 3 errors with complaint about bytes
To: python-list@python.org
On Mon, Oct 20, 2014 at 5:29 PM, Mike Boyle moboyl...@outlook.com wrote:
I'm modifying an extension written with the c-api to have a datatype of
quaternions https://github.com/moble/numpy_quaternion, with one of the
goals being python 3 support. It works nicely in python 2.7, but for python
3.x gives an error that I can't find anywhere on the google. The directory
looks like this:
.../site-packages/
quaternion/
__init__.py
numpy_quaternion.so
__init__.py contains a line like this:
from .numpy_quaternion import quaternion
But when it hits that line, python 3 throws its hands up in disgust:
python -c 'import quaternion'
Traceback (most recent call last):
File string, line 1, in module
File
/Users/mynamehere/.continuum/anaconda/envs/py3k/lib/python3.4/site-packages/quaternion/__init__.py,
line 3, in module
from .numpy_quaternion import quaternion
TypeError: __import__() argument 1 must be str, not bytes
The only thing before that line is `import numpy as np`, which typically
works just fine. Obviously, I'm using python3.4 to compile and (attempt to)
import (with a conda environment), so it's not something as dumb as using
the wrong python. Also, this is the result for both me on my laptop and
Travis-CI https://travis-ci.org/moble/numpy_quaternion, so it doesn't seem
to be anything peculiar to my installation. I've posted this question on
stackoverflow, but haven't gotten much interest; the only responder
suggested I ask here instead.
Any ideas what's going wrong, or where I can go from here?
I question whether the error is really coming from that particular
import line. Try shadowing the __import__ function to see what's
actually being passed there. E.g.:
orig_import = __import__
def debug_import(name, globals=None, locals=None, fromlist=(), level=0):
... print(debug_import:, name, globals, locals, fromlist, level)
... return orig_import(name, globals, locals, fromlist, level)
...
import builtins
builtins.__import__ = debug_import
import sys
debug_import: sys {'__spec__': None, '__loader__': class
'_frozen_importlib.BuiltinImporter', '__package__': None, 'builtins':
module 'builtins' (built-in), 'orig_import': built-in function
__import__, '__builtins__': module 'builtins' (built-in),
'__name__': '__main__', '__doc__': None, 'debug_import': function
debug_import at 0x7f6096aac9d8} {'__spec__': None, '__loader__':
class '_frozen_importlib.BuiltinImporter', '__package__': None,
'builtins': module 'builtins' (built-in), 'orig_import': built-in
function __import__, '__builtins__': module 'builtins' (built-in),
'__name__': '__main__', '__doc__': None, 'debug_import': function
debug_import at 0x7f6096aac9d8} None 0
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Re: Flush stdin
On Mon, Oct 20, 2014 at 4:18 PM, Marko Rauhamaa ma...@pacujo.net wrote:
Dan Stromberg drsali...@gmail.com:
...then everything acts line buffered, or perhaps even character
buffered [...]
That, or we're using two different versions of netcat (there are at
least two available).
Let's unconfuse the issue a bit. I'll take line buffering, netcat and
the OS out of the picture.
Here's a character generator (test.sh):
while : ; do
echo -n x
sleep 1
done
and here's a character sink (test.py):
import sys
while True:
c = sys.stdin.read(1)
if not c:
break
print(ord(c[0]))
Then, I run:
$ bash ./test.sh | python3 ./test.py
120
120
120
120
The lines are output at one-second intervals.
That demonstrates that sys.stdin.read(1) does not block for more than
one character. IOW, there is no buffering whatsoever.
Aren't character-buffered and unbuffered synonymous?
Often with TCP protocols, line buffered is preferred to character
buffered, both for performance and for simplicity: it doesn't suffer
from tinygrams (as much), and telnet becomes a useful test client.
Also, it's a straightforward way of framing your data, to avoid
getting messed up by Nagle or fragmentation. One might find
http://stromberg.dnsalias.org/~strombrg/bufsock.html worth a glance.
It's buffered, but it keeps things framed, and doesn't fall prey to
tinygrams nearly as much as character buffering.
If I change the sink a bit: c = sys.stdin.read(5), I get the same
output but at five-second intervals indicating that sys.stdin.read()
calls the underlying os.read() function five times before returning. In
fact, that conclusion is made explicit by running:
$ bash ./test.sh | strace python3 ./test.py
...
read(0, x, 4096) = 1
read(0, x, 4096) = 1
read(0, x, 4096) = 1
read(0, x, 4096) = 1
read(0, x, 4096) = 1
fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 3), ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f3143bab000
write(1, 120\n, 4120
)= 4
...
This is tremendously inefficient. It demands a context switch for
every character.
If I modify test.py to call os.read():
import os
while True:
c = os.read(0, 5)
if not c:
break
print(ord(c[0]))
The output is again printed at one-second intervals: no buffering.
Thus, we are back at my suggestion: use os.read() if you don't want
Python to buffer stdin for you.
It's true that Python won't buffer (or will be character-buffered)
then, but that takes some potentially-salient elements out of the
picture. IOW, I don't think Python reading unbuffered is necessarily
the whole issue, and may even be going to far.
I have a habit of saying necessary, but not necessarily sufficient,
but in this case I believe it's more of a not necessarily necessary,
and not necessarily sufficient. A lot depends on the other pieces of
the puzzle that you've chosen to unconfuse away. Yes, you can make
Python unbuffered/character-buffered, but that's not the whole story.
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Py2App - Could not import Tkinter error from resulting app
I have just created a python 3.4 application and created the setup.py file and then created an app with py2app. When I ran the resulting application I get an error in the console telling me that it could not import tkinter. Any ideas on how to correct this? Did I do something wrong? -- https://mail.python.org/mailman/listinfo/python-list
Re: OS X Menubar in Tkinter
On Monday, October 20, 2014 5:47:14 AM UTC-5, Noble Bell wrote: On Sunday, October 19, 2014 7:49:34 PM UTC-5, Ned Deily wrote: In article a876c046-18aa-4332-bc9a-b1d1181f2...@googlegroups.com, Noble Bell nobleb...@gmail.com wrote: I am using Python 3.4 on Mac OS X and Tinter 8.5. Does anyone have any code that they would share with me on how to remove the Python menu in the menubar at the top next to the apple'? I would like to have the name of my program there instead and my menu. I can add menus but not sure how to do the special menubar. Any help would be appreciated. The name that shows up in the menu is derived by OS X from the application name in the executing application bundle. If you don't package your program up as an OS X application bundle, defaults will be used; in the case of Python OS X framework builds, Python provides a Python.app within the framework to allow the Python process to be automatically promoted to a full OS X gui process. Probably the simplest approach is to use py2app to create a double-clickable app with the name you want. There's an example in an answer to a similar question on Stackoverflow. And there are some old but still relevant details documented in the Tcl/TkAqua FAQ. https://pypi.python.org/pypi/py2app http://stackoverflow.com/questions/8695926/remove-default-python-submenu- with-tkinter-menu-on-mac-osx http://wiki.tcl.tk/12987 -- Ned Deily, n...@acm.org Thank you. I will take a look at all that this afternoon. Seems like I might have seen that post on stack overflow but not for sure. Creating the app with py2app fixed my problem. -- https://mail.python.org/mailman/listinfo/python-list
Re: Sqlite3 help
Thanks a bunch Sibylle! That seems like a better approach. -- https://mail.python.org/mailman/listinfo/python-list
Re: Py2App - Could not import Tkinter error from resulting app
On 10/20/2014 9:29 PM, Noble Bell wrote: I have just created a python 3.4 application and created the setup.py file and then created an app with py2app. When I ran the resulting application I get an error in the console telling me that it could not import tkinter. Any ideas on how to correct this? Did I do something wrong? tkinter imports _tkinter _tkinter connects with tclx.dll and tkx.dll (x is variable) So one possibility is no accessible tcl/tx. I have no idea how py2app is supposed to handle this on your undisclosed system. -- Terry Jan Reedy -- https://mail.python.org/mailman/listinfo/python-list
Re: Flush stdin
Dan Stromberg drsali...@gmail.com:
Often with TCP protocols, line buffered is preferred to character
buffered,
Terminal devices support line buffering on write.
Line buffering on read is an illusion created by higher-level libraries.
The low-level read function reads in blocks of bytes.
Also, it's a straightforward way of framing your data, to avoid
getting messed up by Nagle or fragmentation.
Nagle affects the communication between the peer OS kernels and isn't
directly related to anything the application does. Also, Nagle doesn't
play any role with pipes.
$ bash ./test.sh | strace python3 ./test.py
...
read(0, x, 4096) = 1
read(0, x, 4096) = 1
read(0, x, 4096) = 1
read(0, x, 4096) = 1
read(0, x, 4096) = 1
fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 3), ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0x7f3143bab000
write(1, 120\n, 4120
)= 4
...
This is tremendously inefficient. It demands a context switch for
every character.
Inefficiency isn't an issue when you generate one byte a second. If data
were generated at a brisker pace, read(0, ..., 4096) could get more
bytes at a time. Notice that even if the Python code requests 5 bytes,
CPython requests up to 4096 bytes in a single read.
Marko
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[issue22675] typo in argparse.py
New submission from Ricordisamoa: It should be no help instead of ho nelp. -- components: Library (Lib) files: typo.patch keywords: patch messages: 229714 nosy: Ricordisamoa priority: normal severity: normal status: open title: typo in argparse.py type: enhancement Added file: http://bugs.python.org/file36976/typo.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22675 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22675] typo in argparse.py
Roundup Robot added the comment: New changeset 550de59a4c6d by Georg Brandl in branch '3.4': Closes #22675: fix typo. https://hg.python.org/cpython/rev/550de59a4c6d -- nosy: +python-dev resolution: - fixed stage: - resolved status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22675 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22675] typo in argparse.py
Ricordisamoa added the comment: AFAICT, this also applies to previous versions. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22675 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22674] strsignal() missing from signal module
Georg Brandl added the comment: Is it possible to determine the range of signal numbers? Otherwise it would be a guessing game where to stop querying when filling up the dictionary. A problem is also that if the signal number is not valid, the return value of strsignal() is unspecified, *and* there is no way to check for this situation because no errors are defined. -- nosy: +georg.brandl ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22674 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22675] typo in argparse.py
Georg Brandl added the comment: Yes, but those are no longer maintained. It's not a critical bug :) -- nosy: +georg.brandl ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22675 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17401] io.FileIO closefd parameter is not documented nor shown in repr
Serhiy Storchaka added the comment: FileIO repr now looks confusing: sys.stdout.buffer.raw _io.FileIO name='stdout' mode='wb' closefd='0' The closefd attribute is not a string '0' or '1', it is boolean value True or False. Here is a patch which fixes a repr. And I think that documentation part of the patch should be backported. -- nosy: +serhiy.storchaka resolution: fixed - stage: - patch review status: closed - open versions: +Python 3.5 -Python 3.2, Python 3.3 Added file: http://bugs.python.org/file36977/io_fileio_repr_closefd.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17401 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17401] io.FileIO closefd parameter is not documented nor shown in repr
Robert Collins added the comment: Yeah thats nicer. I'll apply that later unless you can. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17401 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12067] Doc: remove errors about mixed-type comparisons.
Andy Maier added the comment: I have posted v12 of the patch, which addresses all comments since v11. This Python 3.4 patch can be applied to the default (3.5 dev) branch as well. I will start working on a similar patch for Python 2.7 now. -- Added file: http://bugs.python.org/file36978/issue12067-expressions-py34_v12.diff ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12067 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17401] io.FileIO closefd parameter is not documented nor shown in repr
Serhiy Storchaka added the comment: May be include closefd in the repr only when it is False? By default closefd is True and in common case the repr will be more compact. -- Added file: http://bugs.python.org/file36979/io_fileio_repr_closefd_2.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17401 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22676] _pickle.c
New submission from kbengine:
I have an application, the use of Python3.2.3 development.
When I upgrade to Python3.4.2, found a problem.
I have an extended xxx.c (c-python) module, I call pickle to serialize and
deserialize, _pickle.c calls the whichmodule to look for this module, The final
will be to find the module from sys.modules.
But probably there are 200 elements in sys.modules, Use the obj = getattribute
(module, global_name, allow_qualname) to try to get the object:
static PyObject *
getattribute(PyObject *obj, PyObject *name, int allow_qualname) {
...
...
...
tmp = PyObject_GetAttr(obj, subpath);
Py_DECREF(obj);
// There will be hundreds of times to return to NULL
// There will be hundreds of times calls PyErr_Format
// (PyExc_AttributeError, Can't get attribute%R on%R , name, obj);
// This process will lead to hundreds of calls to moduleobject.c-
// module_repr(PyModuleObject *m).
// So I frequently call pickle.dumps CPU consumption sharply.
if (tmp == NULL) {
if (PyErr_ExceptionMatches(PyExc_AttributeError)) {
PyErr_Clear();
PyErr_Format(PyExc_AttributeError,
Can't get attribute %R on %R, name, obj);
}
Py_DECREF(dotted_path);
return NULL;
}
...
...
}
--
ncalls tottime percall cumtime percall filename:lineno(function)
3150.0010.0000.0040.000 frozen
importlib._bootstrap:690(_module_repr)
I went wrong?
Look forward to answer, thanks!
--
components: Extension Modules
files: 20141020193031.jpg
messages: 229723
nosy: kbengine
priority: normal
severity: normal
status: open
title: _pickle.c
type: performance
versions: Python 3.4
Added file: http://bugs.python.org/file36980/20141020193031.jpg
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[issue22677] icon not loaded
New submission from Ahmad El-Komey: Versions 2.7.7 and 2.7.8 (with both builds, 86 and 64 builds) have some strange things that is different from other versions: 1. The tk icon of the IDLE is not loaded. The icon loaded is as this one: Python27\Lib\idlelib\Icons\idle.ico and it should be like the one found in Python27\Lib\idlelib\Icons\tk.gif 2. I cannot pin a shortcut to the program! This is not the case with other python versions. -- components: IDLE, Installation, Windows messages: 229724 nosy: Ahmad.El-Komey, steve.dower, tim.golden, zach.ware priority: normal severity: normal status: open title: icon not loaded type: behavior versions: Python 2.7 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22677 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22677] icon not loaded
Changes by Zachary Ware zachary.w...@gmail.com: -- nosy: +terry.reedy ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22677 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22676] _pickle.c
Changes by Serhiy Storchaka storch...@gmail.com: -- nosy: +alexandre.vassalotti, pitrou ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22676 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22677] IDLE: icon not loaded
Changes by STINNER Victor victor.stin...@gmail.com: -- title: icon not loaded - IDLE: icon not loaded ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22677 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22676] _pickle.c
Changes by STINNER Victor victor.stin...@gmail.com: -- nosy: +haypo ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22676 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22677] IDLE: icon not loaded
Ahmad El-Komey added the comment: EDIT: Regarding the icon, I found that this is not an issue. In fact, this is the new icon starting from version 2.7.7 (The same goes for 3.4.2. Not sure of previous versions) Regarding the pin to taskbar: After uninstalling Python 3.3 and installing Python 3.4.2, I can pin python 2.7.8 to the taskbar. I really have no idea why. That is all. -- resolution: - not a bug status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22677 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22674] strsignal() missing from signal module
STINNER Victor added the comment: I don't think that a strsignal() is required, signals now have a name attribute! Python 3.5.0a0 (default:07ae7bc06af0, Oct 16 2014, 09:46:01) import signal signal.SIGINT Signals.SIGINT: 2 signal.SIGINT.name 'SIGINT' -- nosy: +haypo ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22674 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17401] io.FileIO closefd parameter is not documented nor shown in repr
Changes by Arfrever Frehtes Taifersar Arahesis arfrever@gmail.com: -- nosy: +Arfrever ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17401 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22673] document the special features (eg: fdclose=False) of the standard streams
Changes by Arfrever Frehtes Taifersar Arahesis arfrever@gmail.com: -- nosy: +Arfrever ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22673 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15989] Possible integer overflow of PyLong_AsLong() results
Changes by Arfrever Frehtes Taifersar Arahesis arfrever@gmail.com: -- nosy: +Arfrever ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15989 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22660] Review ssl docs for security recommendations
Changes by Arfrever Frehtes Taifersar Arahesis arfrever@gmail.com: -- nosy: +Arfrever ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22660 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22676] Creating the string representation of a module is slower
Brett Cannon added the comment: In Python 3.3 the import machinery changed to use importlib. This means the code to create the representation of a module now calls into Python code (the `frozen importlib._bootstrap:690(_module_repr)` you're seeing). But my question is why are you not calling PyObject_HasAttr() before calling PyObject_GetAttr()? Exceptions may be relatively cheap but they are not free. -- nosy: +brett.cannon status: open - pending title: _pickle.c - Creating the string representation of a module is slower ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22676 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22445] Memoryviews require more strict contiguous checks then necessary
Sebastian Berg added the comment: Antoine, sounds good to me, I don't mind this being in python rather sooner then later, for NumPy itself it does not matter I think. I just wanted to warn that there were problems when we first tried to switch in NumPy, which, if I remember correctly, is now maybe 2 years ago (in a dev version), though. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22445 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22678] An OSError subclass for no space left on device would be nice
New submission from Mathieu Bridon: I found myself writing the following code the other day: try: os.mkdir(path) except PermissionError: do_something() except FileExistsError: do_something_else() except FileNotFoundError: do_yet_another_thing() except OSError as e: import errno if e.errno == errno.ENOSPC: and_do_one_more_different_thing() else: raise e The OSError subclasses in Python 3 are amazing, I love them. I just wish there'd be more of them. :) -- components: Library (Lib) messages: 229729 nosy: bochecha priority: normal severity: normal status: open title: An OSError subclass for no space left on device would be nice versions: Python 3.4 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22678 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22678] An OSError subclass for no space left on device would be nice
Changes by Mathieu Bridon boche...@daitauha.fr: -- keywords: +patch Added file: http://bugs.python.org/file36981/0001-New-NoSpaceError.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22678 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22678] An OSError subclass for no space left on device would be nice
Changes by Mathieu Bridon boche...@daitauha.fr: Added file: http://bugs.python.org/file36982/0002-Use-the-new-NoSpaceError.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22678 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22679] Add encodings of supported in glibc locales
New submission from Serhiy Storchaka: There are 6 encodings used in supported by glibc locales: ARMSCII-8 - Armenian encoding EUC-TW - Taiwan encoding in EUC family GEORGIAN-PS - Georgian encoding KOI8-T - Tajik encoding in KOI family RK1048 - Kazakh variation of CP1251 TCVN5712-1 - Vietnam encoding All these encodings are rare nowadays, but the fact that they are supported as encoding of official glibc locales means that they were used in some places in some time and there are some documents in these encodings. May be they are used even nowadays. I think it is worth to add support of all this encodings in Python. This is a meta-issue. There are requests for support of GEORGIAN-PS (issue19459) and TCVN5712-1 (issue21081). -- components: Library (Lib) messages: 229730 nosy: haypo, lemburg, loewis, serhiy.storchaka priority: normal severity: normal status: open title: Add encodings of supported in glibc locales type: enhancement versions: Python 3.5 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22679 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22679] Add encodings of supported in glibc locales
Changes by Serhiy Storchaka storch...@gmail.com: -- dependencies: +Python does not support the GEORGIAN-PS charset, missing vietnamese codec TCVN 5712:1993 in Python ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22679 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22680] unittest discovery is fragile
New submission from Antoine Pitrou: I just got the following traceback when trying discover without 3.5. It runs fine under 3.4... $ ~/cpython/default/python -m unittest discover -v Traceback (most recent call last): File /home/antoine/cpython/default/Lib/runpy.py, line 170, in _run_module_as_main __main__, mod_spec) File /home/antoine/cpython/default/Lib/runpy.py, line 85, in _run_code exec(code, run_globals) File /home/antoine/cpython/default/Lib/unittest/__main__.py, line 18, in module main(module=None) File /home/antoine/cpython/default/Lib/unittest/main.py, line 93, in __init__ self.runTests() File /home/antoine/cpython/default/Lib/unittest/main.py, line 244, in runTests self.result = testRunner.run(self.test) File /home/antoine/cpython/default/Lib/unittest/runner.py, line 168, in run test(result) File /home/antoine/cpython/default/Lib/unittest/suite.py, line 87, in __call__ return self.run(*args, **kwds) File /home/antoine/cpython/default/Lib/unittest/suite.py, line 125, in run test(result) File /home/antoine/cpython/default/Lib/unittest/suite.py, line 87, in __call__ return self.run(*args, **kwds) File /home/antoine/cpython/default/Lib/unittest/suite.py, line 125, in run test(result) File /home/antoine/cpython/default/Lib/unittest/suite.py, line 87, in __call__ return self.run(*args, **kwds) File /home/antoine/cpython/default/Lib/unittest/suite.py, line 125, in run test(result) File /home/antoine/cpython/default/Lib/unittest/case.py, line 625, in __call__ return self.run(*args, **kwds) File /home/antoine/cpython/default/Lib/unittest/case.py, line 553, in run result.startTest(self) File /home/antoine/cpython/default/Lib/unittest/runner.py, line 54, in startTest self.stream.write(self.getDescription(test)) File /home/antoine/cpython/default/Lib/unittest/runner.py, line 47, in getDescription return '\n'.join((str(test), doc_first_line)) File /home/antoine/cpython/default/Lib/unittest/case.py, line 1354, in __str__ self._testFunc.__name__) AttributeError: 'str' object has no attribute '__name__' -- components: Library (Lib) messages: 229731 nosy: ezio.melotti, michael.foord, pitrou, rbcollins priority: normal severity: normal stage: needs patch status: open title: unittest discovery is fragile type: behavior versions: Python 3.5 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22680 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22680] unittest discovery is fragile
Michael Foord added the comment: I assume you mean you get the error *with* 3.5 (not without). Does this happen *every time* (i.e. is it trivially reproducible) - or can you provide a repro? This is regression that I would *assume* (a totally lazy assumption) introduced by the new error handling code. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22680 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22680] unittest discovery is fragile
Antoine Pitrou added the comment: I assume you mean you get the error *with* 3.5 (not without). Yes, sorry :-) Does this happen *every time* (i.e. is it trivially reproducible) It happens with the llvmlite repository: https://github.com/numba/llvmlite Since using it requires some compiling, I could try to investigate myself if you tell me what to look for. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22680 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22680] unittest discovery is fragile
Michael Foord added the comment: As _testFunc is a string and shouldn't be, I'd be very interested to know *what* the string is. That may give us a clue as to where it has come from. (So a try...except...raise that also prints that value would be a good first step.) -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22680 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22680] unittest discovery is fragile
Antoine Pitrou added the comment: testFunc contains runTest (!). -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22680 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21081] missing vietnamese codec TCVN 5712:1993 in Python
Jean Christophe André added the comment: A note to inform about my progress. (I had a long period without free time at hand) While seeking (again) official documents on the topic, I mainly found a lot of non-official ones, but some are notorious enough to use them as references. I am now in the process of creating the requested patch. I am currently studying the proper way to do it. I expect to get it ready this weekend, in the hope to have it accepted for Python 3.5. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21081 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22680] unittest discovery is fragile
Antoine Pitrou added the comment: Ok, apparently it's because I have from unittest import * somewhere. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22680 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22674] strsignal() missing from signal module
Georg Brandl added the comment: Nice. However, strsignal() returns not just SIGINT, but Interrupted etc. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22674 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22680] unittest discovery is fragile
Changes by Barry A. Warsaw ba...@python.org: -- nosy: +barry ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22680 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22681] Add support of KOI8-T encoding
New submission from Serhiy Storchaka: KOI8-T is Tajik encoding partially compatible with KOI8-R. This is default encoding of Tajik locale tg_TJ in glibc (but in X11 locale.alias file it is KOI8-C, issue20087). Proposed patch adds support for this encoding. I have not found official mapping of KOI8-T and have used a table from Apple's implementation of libiconv. It matches a table in Wikipedia [2] and GNU iconv. [1] http://www.opensource.apple.com/source/libiconv/libiconv-4/libiconv/tests/KOI8-T.TXT [2] https://ru.wikipedia.org/wiki/КОИ-8 (Russian) -- components: Library (Lib) messages: 229739 nosy: serhiy.storchaka priority: normal severity: normal stage: patch review status: open title: Add support of KOI8-T encoding type: enhancement versions: Python 3.5 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22681 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22680] unittest discovery is fragile
Changes by Ethan Furman et...@stoneleaf.us: -- nosy: +ethan.furman ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22680 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
