NovelSpace Media, LLC announces the launch of their new online bookstore and web portal devoted to developers and programmers.
NovelSpace Media, LLC has announced the launch of its new online bookstore, NovelSpace.com. Located at http://www.novelspace.com, it features a wide and varied selection of books for computer aficionados, developers, software engineers, and programmers. In addition to low prices and shipping fees, NovelSpace.com boasts an easily navigated interface along with quick checkout and simple account management. Proceeds from each purchase are donated in support of various open source projects. NovelSpace Media is also inaugurating Developer Haven, the first in a series of web portals to be developed by the company. Designed as an online resource for programmers and software developers, Developer Haven features a section devoted to industry news and a directory of links to websites with code samples, tutorials, components, and software packages. Users can also test-drive a beta version of DH Search, an internet search engine tasked exclusively to researching material related to programming and software development. Developer Haven can be accessed from NovelSpace.com, or on its own at http://developerhaven.novelspace.com. About NovelSpace Media, LLC NovelSpace Media is a development firm currently specializing in e-commerce and portal websites. The driving goal of the company is to offer customers easy access to books and resources at competitive prices, as well as building thriving online communities around rich content offered through topic specific web-portals. [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
Re: distributing a app frozen by cx_freeze
Flavio wrote: Traceback (most recent call last): File /home/fccoelho/Downloads/cx_Freeze-3.0.2/initscripts/Console.py, line 26, in ? File epigrass.py, line 4, in ? ImportError: /home/flavio/freeze/qt.so: undefined symbol: _ZNK9QSGIStyle9classNameEv It is looking for the Original cx_freeze installation!! I doubt it is. Do you have the QT installed on the second system? If you do, is it the same version as on the original system? Are you sure you copied all the files over? It looks like qt.so is trying to access a C++ symbol in another library (libqt.so perhaps?), but that other library isn't installed. cx_freeze probably only packages the Python module binding to the QT library; not the library itself. If so, you'll need to install QT on the other system, or get cx_freeze to bundle up the QT shared library (if the license allows it, of course), or rebuild the qt.so with the static QT libraries. Carl Banks -- http://mail.python.org/mailman/listinfo/python-list
Tail Call Optimization Decorator?
Tail Call Optimization and Recursion are separate concepts! -- Regards, Casey -- http://mail.python.org/mailman/listinfo/python-list
Amazing offers for Computers,Laptops
Hy every one. An amazing opportunity for all the people to buy and get all the information related to the Laptops, Computer Systems, registration for free trail and for rental basis. Effort less thing, just make look over www.eazyrentals.com -- http://mail.python.org/mailman/listinfo/python-list
Re: distributing a app frozen by cx_freeze
Thanks for the hint. I'll try to get cx_freeze to bundle up other shared libraries it may not be bundling such as qtcanvas, qtext, qtui, etc. and see if it works. I'll post back the results to help other poor souls like me. Thanks -- http://mail.python.org/mailman/listinfo/python-list
Slovenian Python User Group
Hi! just wanted to send a notice about a new portal/group for Slovenian Python fans here :) http://soup.zen.si (btw, it's in slovene lang) Sebastjan -- http://mail.python.org/mailman/listinfo/python-list
Re: A critic of Guido's blog on Python's lambda
Alexander Schmolck [EMAIL PROTECTED] writes: I think that in most contexts lexical transparency is desirable so that deviations from lexical transparency ought to be well motivated. I also believe that a construct that is usually used to establish a lexically transparent binding shouldn't be equally used for dynamic bindings so that it isn't syntactically obvious what's going on. I've already provided some reasons why CL's design wrt. binding special and lexical variables seems bad to me. I don't think these reasons were terribly forceful but as I'm not aware of any strong motivation why the current behaviour would be useful I'm currently considering it a minor wart. To make things more concrete: What would be the downside of, instead of doing something like: (let ((*x* ...)) [(declare (special *x*))] ...) ; where [X] denotes maybe X Let's start with this. You seem to be saying that the above construct is inferior to the alternatives you are about to suggest. Why? And since you are adding an optional form, let's break it down into its separate situations: 1. (let ((*x* ...)) (declare (special *x*)) ...) Here there is no question about the specialness of *x*; it is textually obvious what the binding is - that it is not a lexical binding but a special binding. 2. (let ((*x* ...)) ...) [where there is no special declaration for *x* within the form] Here, the issue is that it is not obvious that *x* is special (in this case, it would have to already be a dynamic variable (what we internally call globally special), because a special declaration within a lexical context does not affect inner bindings. Perhaps this form is the one you are really having trouble with. doing any of the below: a) using a different construct e.g. (fluid-let ((*x* ...)) ...) for binding special variables Unless you also _remove_ the #2 case above, this seems no diferent than writing a macro for the #1 case, above. b) having to use *...* (or some other syntax) for special variables In fact, the spec does suggest precisely this (see http://www.franz.com/support/documentation/8.0/ansicl/dictentr/defparam.htm, in the Notes section), and to the extent that programmers obey the suggestion, the textual prompting is present in the name. c) using (let ((q (special *x*) (,a ,b ,@c)) (values 1 2 '(3 4 5 6))) (list q ((lambda () (incf *x*))) a b c)) ; = (1 3 3 4 (5 6)) (It's getting late, but hopefully this makes some vague sense) Well, sort of; this seems simply like a sometimes-fluid-let, whose syntax could easily be established by a macro (with destructurings whose form is (special X) could be specially [sic] treated. Now if in the above example you would have trouble with (a) and/or (c) based on the absence of a lexical declaration (i.e. one that would undo the effect of a globally special declaration), thus guaranteeing that a fluid-let or a sometimes-fluid-let would work, you should know that while I was working on the Environments Access module I theorized and demonstrated that such a declaration could be easily done within a conforming Common Lisp. I leave you with that demonstration here (though it really is only for demonstration purposes only; I don't necessarily propose that CL should add a lexical declaration to the language): [This only works on Allegro CL 8.0]: CL-USER(1): (defvar pie pi) PIE CL-USER(2): (compile (defun circ (rad) (* pie rad rad))) CIRC NIL NIL CL-USER(3): (circ 10) 314.1592653589793d0 CL-USER(4): (compile (defun foo (x) (let ((pie 22/7)) (circ x FOO NIL NIL CL-USER(5): (foo 10) 2200/7 CL-USER(6): (float *) 314.2857 CL-USER(7): (sys:define-declaration sys::lexical (rest vars) nil :variable (lambda (declaration env) (declare (ignore env)) (let* ((spec '(lexical t)) (res (mapcar #'(lambda (x) (cons x spec)) (cdr declaration (values :variable res SYSTEM::LEXICAL CL-USER(8): (compile (defun foo (x) (let ((pie 22/7)) (declare (sys::lexical pie)) (circ x ; While compiling FOO: Warning: Variable PIE is never used. FOO T NIL CL-USER(9): (foo 10) 314.1592653589793d0 CL-USER(10): -- Duane Rettig[EMAIL PROTECTED]Franz Inc. http://www.franz.com/ 555 12th St., Suite 1450 http://www.555citycenter.com/ Oakland, Ca. 94607Phone: (510) 452-2000; Fax: (510) 452-0182 -- http://mail.python.org/mailman/listinfo/python-list
plot data from Excel sheet by Matplotlib, how?
Hi all, Can any1 please guide me how to plot data from Excel by Matplotlib? Let's say, I have 78(rows) x 8(cols) data in an Excel sheet. I would like to plot data for all 78(rows) at 4th column against data for all 78(rows) at 7th column. How to plot it? Thank u! -- http://mail.python.org/mailman/listinfo/python-list
Sending mail with attachment...
Hi, I have now eventually finished my newbie-backup script and I'm very proud of the way it functions... Anyways, I am looking for an easy way to use smtplib to send an email with the output log of the script to multiple accounts. I need to use it with a smtp server, and cannot pipe it directly to sendmail. I have tried about 50 different ways that I have googled for in the last 6 hours, but none of them work, I keep on getting errors. The script runs on a Linux system. Thanks for any help. -- http://mail.python.org/mailman/listinfo/python-list
Re: getting rid of pass
David Murmann a écrit : Hi all! i just had this crazy idea: instead of while cond(): pass write while cond(). Yuck or try: import xyz except ImportError: pass compared to try: import xyz except ImportError. Yuck again i don't know whether this is syntactically unambiguous or replaces all uses of pass, but i find it quite nice to read. I don't. I find it highly unreadable. I really find the pass statement to be a great idea, and to highly improve readability. also if something like this has been proposed before and rejected, i apologize for this late-in-the-night idea. what do you people think? Please don't feel offended, but I think it would be a very bad thing to do. -- http://mail.python.org/mailman/listinfo/python-list
Re: compiling module from string and put into namespace
glomde a écrit : Tanks but that isn't what I am looking for. I really want a function that you can call and imports the module into the calling functions namespace. Please read the documentation of the __import__() *function*. (notice the double leading and ending underscores and the parenthesis). I dont want the caller to call import but a function. Please read the documentation of the __import__() *function*. (notice the double leading and ending underscores and the parenthesis). -- http://mail.python.org/mailman/listinfo/python-list
Is it possible to set the date/time of a directory in windows with Python? If so how?
I'm trying to set any of the dates (create, modification, access) of a directory under windows with python. I'm trying to do this as I'm trying to write a unittest for a directory cleaning script I'm writing (ie I need the test to set the create/mod time for some of the directories so that I can be sure that the script works properly - as it picks dirs based upon their age). I've tried using the utime( path, times). That doesn't work as the doco states Whether a directory can be given for path depends on whether the operating system implements directories as files (for example, Windows does not). So that doesn't work. So I tried mark hammonds win32 extensions with something like this import win32file, win32con, pywintypes filehandle = win32file.CreateFile(file, win32file.GENERIC_WRITE,win32file.FILE_SHARE_WRITE, None,win32con.OPEN_ALWAYS, 0, None) nowWin32=pywintypes.Time(theTime) win32file.SetFileTime(filehandle, nowWin32, nowWin32, nowWin32) which works fine for files but fails with Access Denied when I invoke the CreateFile with a directory. This seems to occur no matter the combination of READ or WRITE I choose for the parameters. So does anyone have any useful suggestions (other than not using windows)? I've thought of a couple of reallly nasty solutions: 1. Temporarily alter the underlying system clock back to the required time and create the directory then resetting it back again afterwards. 2. Create the required directory in some form of virtual filesystem - eg Zip file, rar archive, tar etc. Then extract it to the real filesystem and hope windows honors the timestamps (untested at this point). None of those is particularly appealing. Thanks for listening. -- http://mail.python.org/mailman/listinfo/python-list
Re: Is it possible to set the date/time of a directory in windows with Python? If so how?
ToddLMorgan [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] I'm trying to set any of the dates (create, modification, access) of a directory under windows with python. I'm trying to do this as I'm trying to write a unittest for a directory cleaning script I'm writing (ie I need the test to set the create/mod time for some of the directories so that I can be sure that the script works properly - as it picks dirs based upon their age). I've tried using the utime( path, times). That doesn't work as the doco states Whether a directory can be given for path depends on whether the operating system implements directories as files (for example, Windows does not). So that doesn't work. So I tried mark hammonds win32 extensions with something like this import win32file, win32con, pywintypes filehandle = win32file.CreateFile(file, win32file.GENERIC_WRITE,win32file.FILE_SHARE_WRITE, None,win32con.OPEN_ALWAYS, 0, None) nowWin32=pywintypes.Time(theTime) win32file.SetFileTime(filehandle, nowWin32, nowWin32, nowWin32) which works fine for files but fails with Access Denied when I invoke the CreateFile with a directory. This seems to occur no matter the combination of READ or WRITE I choose for the parameters. So does anyone have any useful suggestions (other than not using windows)? I've thought of a couple of reallly nasty solutions: 1. Temporarily alter the underlying system clock back to the required time and create the directory then resetting it back again afterwards. 2. Create the required directory in some form of virtual filesystem - eg Zip file, rar archive, tar etc. Then extract it to the real filesystem and hope windows honors the timestamps (untested at this point). None of those is particularly appealing. Thanks for listening. To create a handle to a directory, you have to use FILE_FLAG_BACK_SEMANTICS. Roger -- http://mail.python.org/mailman/listinfo/python-list
Named regexp variables, an extension proposal.
Proposal: Named RE variables
==
The problem I have is that I am writing a 'good-enough' verilog tag
extractor as a long regular expression (with the 'x' flag for
readability), and find myself both
1) Repeating sections of the RE, and
2) Wanting to add '(?Psome_clarifier...) ' around sections
because I know what the section does but don't really want
the group.
If I could write:
(?P/verilog_name/ [A-Za-z_][A-Za-z_0-9\$\.]* | \\\S+ )
...and have the RE parser extract the section of RE after the second
'/' and store it associated with its name that appears between the
first two '/'. The RE should NOT try and match against anything between
the outer '(' ')' pair at this point, just store.
Then the following code appearing later in the RE:
(?P=verilog_name)
...should retrieve the RE snippet named and insert it into the RE
instead of the '(?P=...)' group before interpreting the RE 'as normal'
Instead of writing the following to search for event declarations:
vlog_extract = r'''(?smx)
# Verilog event definition extraction
(?: event \s+ [A-Za-z_][A-Za-z_0-9\$\.]* \s* (?: , \s*
[A-Za-z_][A-Za-z_0-9\$\.]*)* )
'''
I could write the following RE, which I think is clearer:
vlog_extract = r'''(?smx)
# Verilog identifier definition
(?P/IDENT/ [A-Za-z_][A-Za-z_0-9\$\.]* (?!\.) )
# Verilog event definition extraction
(?: event \s+ (?P=IDENT) \s* (?: , \s* (?P=IDENT))* )
'''
Extension; named RE variables, with arguments
===
In this, all group definitions in the body of the variable definition
reference the literal contents of groups appearing after the variable
name, (but within the variable reference), when the variable is
referenced
So an RE variable definition like:
defs = r'(?smx) (?P/GO/ go \s for \s \1 )'
Used like:
rgexp = defs + r
(?P=GO (it) )
\s+
(?P=\GO (broke) )
Would match the string:
go for it go for broke
As would:
defs2 = r'(?smx) (?P/GO/ go \s for \s (?P=subject) )'
rgexp = defs2 + r
(?P=GO (?Psubject it) )
\s+
(?P=\GO (?Psubject broke) )
The above would allow me to factor out sections of REs and define
named, re-ussable RE snippets.
Please comment :-)
- Paddy.
--
http://mail.python.org/mailman/listinfo/python-list
Re: How to install pyTrix?
DeepBlue wrote: Hi all, can any1 please tell me how to install pyTrix? thx! The first step should be to get it, but how can it be got? Claudio -- http://mail.python.org/mailman/listinfo/python-list
Re: Sending mail with attachment...
Hi Guys, I just wanted to post the error, and then also the coda that causes itI get this no matter what I do to this, and I don't understand it. Any help would be welcome. Thank you Error :: Traceback (most recent call last): File /home/merrigan/projects/Backup Script/hobbitarchive.py, line 113, in ? mailSender() File /home/merrigan/projects/Backup Script/hobbitarchive.py, line 74, in mailSender s.sendmail(fromaddy, recievelist, mesg.as_string()) File /usr/lib/python2.4/email/Message.py, line 129, in as_string g.flatten(self, unixfrom=unixfrom) File /usr/lib/python2.4/email/Generator.py, line 82, in flatten self._write(msg) File /usr/lib/python2.4/email/Generator.py, line 120, in _write self._write_headers(msg) File /usr/lib/python2.4/email/Generator.py, line 166, in _write_headers header_name=h, continuation_ws='\t').encode() File /usr/lib/python2.4/email/Header.py, line 395, in encode return self._encode_chunks(newchunks, maxlinelen) File /usr/lib/python2.4/email/Header.py, line 355, in _encode_chunks _max_append(chunks, s, maxlinelen, extra) File /usr/lib/python2.4/email/quopriMIME.py, line 79, in _max_append L.append(s.lstrip()) AttributeError: 'list' object has no attribute 'lstrip' :: Code :: def mailSender(): openlogmsg = open(completelog, 'rb') mesg = MIMEText(openlogmsg.read()) openlogmsg.close() mesg['Subject'] = subject mesg['From'] = fromaddy mesg['To'] = recievelist s = smtplib.SMTP(smtpserver) # s.connect(smtpserver) s.sendmail(fromaddy, recievelist, mesg.as_string()) s.quit() :: Thanks a lot :) -- http://mail.python.org/mailman/listinfo/python-list
Re: A critic of Guido's blog on Python's lambda
Ken Tilton [EMAIL PROTECTED] writes: I think the point is that, with the variable actually being just a string and with dedicated new explicit functions required as accessors, well, you could hack that up in any language with dictionaries. It is the beginnings of an interpreter, not Python itself even feigning special behavior. If the semantics and the global structure of the code is right, only you don't like the local concrete syntax, then the complaint is at most as justified as complaints against Lisp parentheses. -- __( Marcin Kowalczyk \__/ [EMAIL PROTECTED] ^^ http://qrnik.knm.org.pl/~qrczak/ -- http://mail.python.org/mailman/listinfo/python-list
SystemError: ... cellobject.c:22: bad argument to internal ?
From the trace of a 2.3.5 software i got: \'SystemError: C:sfpythondist23srcObjectscellobject.c:22: bad argument to internal function\\n\'] from the middle of normal function / or its call. What is this? There is: http://mail.python.org/pipermail/python-list/2005-January/260273.html but seems to be something else. There is no dynamic addition of class-method. But the last function called is a callback function in 3rd level inner function of class method like: class X: def a(): def b(): ... def c():...# breaks with systemerror schedule_callback(c) # - upon Windows WM_TIMER event ... Will there be another bug-fix release of Python 2.3 ? -robert -- http://mail.python.org/mailman/listinfo/python-list
Re: A critic of Guido's blog on Python's lambda
Alexander Schmolck [EMAIL PROTECTED] writes: I'd like to see a demonstration that using the same binding syntax for special and lexical variables buys you something apart from bugs. There are 3 fundamental operations related to plain mutable variables: A1. Making a new mutable variable with an initial value. A2. Getting the current value. A3. Setting the new value. and 4 operations related to dynamically scoped variables: B1. Making a new dynamic variable with an initial value. B2. Getting the current value. B3. Setting the new value. B4. Local rebinding with a new initial value. If you don't ever use B4, dynamic variables behave exactly like plain variables. For this reason I see no point in distinguishing A2 from B2, or A3 from B3. Dynamic variables are a pure extension of plain variables by providing an additional operation. Distinguishing the syntax of A1 and B1 is natural: somehow it must be indicated what kind of variable is created. Mutability is orthogonal to dynamic scoping. It makes sense to have a variable which is like a plain variable but without A3, and a variable which is like a dynamic variable but without B3, although it doesn't provide anything new, only allows to express more constraints with a potential for optimization. I won't consider them here. Common Lisp does something weird: it uses the same syntax for A1 and B4, where the meaning is distinguished by a special declaration. Here is its syntax: Directly named plain variables: A1. (let ((name value)) body) and other forms A2. name A3. (setq name value), (setf name value) First-class dynamic variables: B1. (gensym) B2. (symbol-value variable) B3. (set variable value), (setf (symbol-value variable) value) B4. (progv `(variable) `(value) body) Directly named dynamic variables: B1. (defvar name value), (defparameter name value) B2. name B3. (setq name value), (setf name value) B4. (let ((name value)) body) and other forms Dynamic variables in Lisp come in two flavors: first-class variables and directly named variables. Directly named variables are always global. You can convert a direct name to a first-class variable by (quote name). Plain variables have only the directly named flavor and they are always local. You can emulate the first-class flavor by wrapping a variable in a pair of closures or a closure with dual getting/setting interface (needs a helper macro in order to be convenient). You can emulate a global plain variable by wrapping a dynamic variable in a symbol macro, ignoring its potential for local rebinding. You can emulate creation of a new first-class variable by using a dynamic variable and ignoring its potential for local rebinding, but this can't be used to refer to an existing directly named plain variable. In order to create a plain variable, you must be sure that its name is not already used by a dynamic variable in the same scope. So any essential functionality is possible to obtain, but the syntax is very irregular. -- __( Marcin Kowalczyk \__/ [EMAIL PROTECTED] ^^ http://qrnik.knm.org.pl/~qrczak/ -- http://mail.python.org/mailman/listinfo/python-list
Re: where do you run database scripts/where are DBs 'located'?
John, Yep, different module. I'll watch the thread. Perhaps once you get connected, we should make a mini-HOWTO for XP users while it's fresh in your mind, because this question seems to come up a lot, and beginners would probably appreciate a short howto that would perhaps detail how to set up either mysqldb, mxodbc, or both on XP and get Python talking to MySQL. I think no matter which you choose, you will benefit from downloading the mysql connector and adding your mysql db to datasources on XP. Then you can access the db just by using the name you gave it in the datasources panel, e.g. driv=bbdatabank rick -- http://mail.python.org/mailman/listinfo/python-list
Re: where do you run database scripts/where are DBs 'located'?
driv=bbdatabank Oops, sorry, I meant, driv='DSN=bbdatabank' rick -- http://mail.python.org/mailman/listinfo/python-list
Re: Named regexp variables, an extension proposal.
On 13/05/2006 7:39 PM, Paddy wrote: [snip] Extension; named RE variables, with arguments === In this, all group definitions in the body of the variable definition reference the literal contents of groups appearing after the variable name, (but within the variable reference), when the variable is referenced So an RE variable definition like: defs = r'(?smx) (?P/GO/ go \s for \s \1 )' Used like: rgexp = defs + r (?P=GO (it) ) \s+ (?P=\GO (broke) ) Would match the string: go for it go for broke As would: defs2 = r'(?smx) (?P/GO/ go \s for \s (?P=subject) )' rgexp = defs2 + r (?P=GO (?Psubject it) ) \s+ (?P=\GO (?Psubject broke) ) The above would allow me to factor out sections of REs and define named, re-ussable RE snippets. Please comment :-) 1. Regex syntax is over-rich already. 2. You may be better off with a parser for this application instead of using regexes. 3. \\ is overloaded to the point of collapse already. Using it as an argument marker could make the universe implode. 4. You could always use Python to roll your own macro expansion gadget, like this: C:\junktype paddy_rx.py import re flags = r'(?smx)' GO = r'go \s for \s 1 2' WS = r'\s+' ARGMARK = # Can the comments about the style of # this code; I've just translated it from # a now-dead language with max 6 chars in variable names :-) def macsub(tmplt, *infils): wstr = tmplt ostr = while wstr: lpos = wstr.find(ARGMARK) if lpos 0: return ostr + wstr ostr = ostr + wstr[:lpos] nch = wstr[lpos+1:lpos+2] if 1 = nch = 9: x = ord(nch)-ord(1) if x len(infils): ostr = ostr + infils[x] elif nch == ARGMARK: # double (or whatever) ostr = ostr + ARGMARK else: ostr = ostr + ARGMARK + nch wstr = wstr[lpos+2:] return ostr regexp = .join([ flags, macsub(GO, 'it,\s', 'Paddy'), WS, macsub(GO, 'broke'), ]) print regexp text = go for it, Paddy go for broke m = re.match(regexp, text) print len(text), m.end() C:\junkpaddy_rx.py (?smx) go \s for \s it,\s Paddy \s+ go \s for \s broke 30 30 Cheers, John -- http://mail.python.org/mailman/listinfo/python-list
Re: Is it possible to set the date/time of a directory in windows with Python? If so how?
Thanks very much for that roger :-) I changed my code to filehandle = win32file.CreateFile(file, win32file.GENERIC_WRITE, win32file.FILE_SHARE_WRITE, None, win32con.OPEN_ALWAYS, win32con.FILE_FLAG_BACKUP_SEMANTICS, None) nowWin32=pywintypes.Time(theTime) win32file.SetFileTime(filehandle, nowWin32, nowWin32, nowWin32) ie FILE_FLAG_BACKUP_SEMANTICS and everything works fine Just for the sake of completeness ... I'd just thought of another solution ... to have python determine the modification date for the directory based upon the oldest contained file (I'm guessing windows does the opposite - ie the newest file mod) to give me the effect of having a directory with an older date. The virtual file system idea didn't work either ... files had the correct dates but the dirs didn't as doing the extraction with python libs is subject to the same constraints ... and I didn't think that altering the ZipInfo time entries would have any affect as they appear to only represent files and not directories. I could have spawned a command line to do the extraction but I lost interest at that point. thanks again -- http://mail.python.org/mailman/listinfo/python-list
Re: Tkinter: ability to delete widgets from Text and then re-add them
I now see that I can accomplish what I want using the Canvas widget, instead of the Text widget (I.e., I can create a window on it, delete the window, then re add it without recreating the underlying widget object). As I don't want the raw contents user-editable, I guess its better to use a Canvas, rather than a Text (slightly harder to use, though, I guess) neal -- http://mail.python.org/mailman/listinfo/python-list
Re: Sending mail with attachment...
On 13 May 2006 03:13:33 -0700, Merrigan [EMAIL PROTECTED] wrote: :: Code :: def mailSender(): openlogmsg = open(completelog, 'rb') mesg = MIMEText(openlogmsg.read()) openlogmsg.close() mesg['Subject'] = subject mesg['From'] = fromaddy mesg['To'] = recievelist s = smtplib.SMTP(smtpserver) # s.connect(smtpserver) s.sendmail(fromaddy, recievelist, mesg.as_string()) s.quit() You are passing a list to the To: header, it should be a string. The To header needs to be a text representation of some/all/None of the recipients, or it can contain unrelated text, its a field that the mail client uses to display the email details, it is not related to the sending of the email. The recievelist used during the sendmail function should contain the list of recipient address(es), which means all the TO , CC and BCC addresses for that email - or it can be a string of 1 address if you are on a recent version of Python and there is only 1 recipient. HTH :) -- http://mail.python.org/mailman/listinfo/python-list
Re: reusing parts of a string in RE matches?
Hi Fredrik you brought up some terse and somehow expressive lines with their own beauty ... [this] is best done by a list comprehension: l = [m[1] for m in re.findall(r, t)] or, [...] a generator expression: g = (m[1] for m in re.findall(r, t)) or process(m[1] for m in re.findall(r, t)) ... avoid creating the tuples, ... finditer instead: l = [m.group(2) for m in re.finditer(r, t)] g = (m.group(2) for m in re.finditer(r, t)) finditer is also a good tool to use for m in re.finditer(r, t): s = m.group(2) ... process s in some way ... ... which made me wish to internalize such wisdom too ;-) This looks almost beautiful, it made me stand up and go to some large book stores in order to grab a good book on python. Sadly, there were none (except one small 'dictionary', ISBN: 3826615123). I live in a fairly large city in Germany w/three large bookstores in the center, where one can get loads of PHP and Java books, lots of C/C++ and the like - even some Ruby books (some Rails too) on display (WTF). Not that I wouldn't order books (I do that all the time for 'original versions') but it makes one sad-faced to see the small impact of the Python language here today on bookstore-tournarounds ... Thanks regards Mirco -- http://mail.python.org/mailman/listinfo/python-list
Re: python soap web services
Diez B. Roggisch wrote: Butternut squash wrote: Is there any reason why there isn't any python library that makes using soap as easy as how microsoft .net makes it. I mean I write rudimentary asmx files call them from a webbrowser. The WSDL is generated and then there is documentation and a form to invoke a function. The WSDL will never as easily be created as in .NET/JAVA, as Python lacks static typing annotations that are used by the WSDL-generators. So either someone defines his own type annotation theme for that purpose that can be used to infer the WSDL - or you write WSDL yourself. Which is a major PITA, as the whole SOAP mess. Ravi OTH has pointed out _running_ a SOAP service is easy as cake. I agree python soap is pretty easy to use. Just a bit harder to use the c# classic way to call a web service. -- http://mail.python.org/mailman/listinfo/python-list
Re: Sending mail with attachment...
Replace: mesg['To'] = recievelist By: mesg['To'] = ', '.join(recievelist) -- http://mail.python.org/mailman/listinfo/python-list
Re: How to pass variables between scripts
Gross, Dorit (SDRN) wrote:
[snip]
for f in fileList:
try:
globvars = {'infile' : f}
locvars = {}
execfile('/scripts/second.py', globvars(), locvars)
except IOError:
exit(0)
print locvars
And this is what happens when calling test_exec.py
./test_exec.py
Traceback (most recent call last):
File ./test_exec.py, line 19, in ?
execfile('/scripts/second.py', vars(), results)
TypeError: 'dict' object is not callable
Why do you try to call globevars as if it was a function? As the
traceback states, dictionaries can't be called like that. Just take the
() out and try again.
-smithj
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Package that imports with name of dependent package
Hi. I have code that currently depends on a particular package of a framework. I have decided I want to create my own package because I have made many changes and it is getting too difficult to maintain each time I retrieve an updated version of the framework from svn. The problem is, that there are all sorts of imports to the dependent package throughout my code and I just want to replace this module with something that will provide a reference to my own package without changing the original imports. So it just needs to point to the new package so that the original imports in my code will continue to work. For example, here is a package structure. dependentpackage | + __init__.py + somemodule.py + somefolder | + __init__.py + somesubmodule.py + someotherfolder etc I simply want the dependentpackage to point to the new package leaving no more than an init file or whatever would have to be minimally required to make this work dependentpackage | + __init__.py mypackage | + __init__.py + somemodule.py + somefolder | + __init__.py + somesubmodule.py + someotherfolder etc I my code I still need to have this work: from dependentpackage.somemodule import something - but I want the package to be getting the code from the new module. I'd appreciate hearing of what I can do in an __init__ file or what other strategy could make this work. Many thanks. Regards, David -- http://mail.python.org/mailman/listinfo/python-list
Re: python rounding problem.
Thomas Bartkus [EMAIL PROTECTED] wrote: Grant Edwards [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] On 2006-05-08, Thomas Bartkus [EMAIL PROTECTED] wrote: does python support true rations, which means that 1/3 is a true one-third and not 0.3 rounded off at some arbitrary precision? At risk of being boring ;-) - Python supports both rational and irrational numbers as floating point numbers the way any language on any digital computer does - imprecisely. A true (1/3) can only be expressed as a fraction. At the risk of being both boring and overly pedantic, that's not true. In base 3, the value in question is precisely representable in floating point: 0.1 As soon as you express it as a floating point - you are in a bit of trouble because that's impossible. It's not possible in base 2 or base 10. It's perfectly possible in base 9 (used by the Nenets of Northern Russia) base 12 (popular on planets where everybody has twelve toes) or base 60 (used by th Sumerians). [I don't know if any of those peoples used floating point in those bases -- I'm just pointing out that your prejudice towards base 10 notation is showing.] You can not express (1/3) as a floating point in Python any more than you can do it with pencil and paper. That's true assuming base 2 in Python and base 10 on paper. The base used by Python is pretty much etched in stone (silicon, to be precise). There used to be articles about people working on base-3 logic gates, but base-3 logic never made it out of the lab. However, you can pick any base you want when using paper and pencil. You can be precise and write 1/3 or you can surrender to arithmetic convenience and settle for the imprecise by writing 0.3, chopping it off at some arbitrary precision. Or you can write 0.1 3 :) Ahhh! But if I need to store the value 1/10 (decimal!), what kind of a precision pickle will I then find myself while working in base 3 ? How much better for precision if we just learn our fractions and stick to storing integer numerators alongside integer denominators in big 128 bit double registers ? Even the Nenets might become more computationally precise by such means ;-) And how does a human culture come to decide on base 9 arithmetic anyway? Just guessing: * Use one thumb to point at one of the other 9 fingers * Every finger (except for the thumb) has 3 segments (and links), each of which can easily divided in three part (upper, middle, lower or left middle, right for the links) making 9 points for each finger. Even base 60 makes more sense if you like it when a lot of divisions come out nice and even. You can count to 60 using two hands: Use the right thumb to point on one of the 12 segments of the remaining 4 fingers and on the left hand one finger for each dozen. Of course this is wasting resources as you can count to 1023 with your fingers. I never heard of a culture doing so, though. Florian -- http://www.florian-diesch.de/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Package that imports with name of dependent package
Le Samedi 13 Mai 2006 16:05, David Pratt a écrit : I'd appreciate hearing of what I can do in an __init__ file or what other strategy could make this work. Many thanks. you should leave the original package intact and patch it with new mehod and moddule; for example (A is the original package): A/__init__.py A/B/__init__.py A/B/C.py X/__init__.py X/B/__init__.py X/B/C.py just write in X/__init__.py : import A.B.C, B.C A.B.C = B.C and all from A.B import C following an import of X will return X.B.C. This is how we monkeypatch products in Zope. -- _ Maric Michaud _ Aristote - www.aristote.info 3 place des tapis 69004 Lyon Tel: +33 426 880 097 -- http://mail.python.org/mailman/listinfo/python-list
Re: Package that imports with name of dependent package
David Pratt wrote: Hi. I have code that currently depends on a particular package of a framework. I have decided I want to create my own package because I have made many changes and it is getting too difficult to maintain each time I retrieve an updated version of the framework from svn. The problem is, that there are all sorts of imports to the dependent package throughout my code and I just want to replace this module with something that will provide a reference to my own package without changing the original imports. So it just needs to point to the new package so that the original imports in my code will continue to work. For example, here is a package structure. dependentpackage | + __init__.py + somemodule.py + somefolder | + __init__.py + somesubmodule.py + someotherfolder etc I simply want the dependentpackage to point to the new package leaving no more than an init file or whatever would have to be minimally required to make this work dependentpackage | + __init__.py mypackage | + __init__.py + somemodule.py + somefolder | + __init__.py + somesubmodule.py + someotherfolder etc I my code I still need to have this work: from dependentpackage.somemodule import something - but I want the package to be getting the code from the new module. I'd appreciate hearing of what I can do in an __init__ file or what other strategy could make this work. Many thanks. I think fixing the imports is the better long-term approach. But putting from pkgutil import extend_path import mypackage __path__ = extend_path(mypackage.__path__, __name__) into dependentpackage/__init__.py might work. Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: distributing a app frozen by cx_freeze
Well I managed to get rid of the undefined symbol message by copying all qt libs to the freeze directory, the problem is that now the package is huge (83MB)! So my question is: is there a way to find out exactly which lib is missing ? Thanks -- http://mail.python.org/mailman/listinfo/python-list
Unicode ZSI interaction ??
Dear newsgroup, I have written a cgi script in Python, and it has worked fine for some time. Now the installed Python version has been upgraded to 2.4.1 and I am having problems with non ascii characters. The core of the problem I have is as follows: 1. The webpage contains a text field where the user enters her/his name. 2. My cgi script uses the 'cgi' class to extract the name the user has entered. 3. The cgi script writes the name the user has given to a file. Now, the webpage in question is in Norway; and many Norwegian names are not 8bit clean, i.e. they contain characters which can not be represented with a 7bit ascii encoding. As a consequence I get *either* a UnicodeDecodeError *or* just blanks when writing it to file. Simplest case: -- name = Åse fileH = open(/tmp/namelist.txt,w) fileH.write(name) In this case the first character in the name variable is not in the plain 7bit ascii encoding. The code written above runs without errors or warnings, but the problematic character is simple replaced by a space in the file '/tmp/namelist.txt'. More complicated case: -- The application uses the SOAP protocol via the ZSI module to communicate with some other site. The SOAP call returns a variable, and when this variable is combined with the name variable above I get the UnicodeDecodeError: name = ÅSE ref = SOAP_return_value() fileH = open(/tmp/namelist.txt,a) fileH.write(name:%s ref:%s \n % (name,ref)) fileH.close() This bombs with: UnicodeEncodeError: 'ascii' codec can't encode character u'\xc5' in position 45: ordinal not in range(128) The variable 'ref' returned from the SOAP interaction is (seemingly ...) pure 7bit ascii. Any suggestions greatly appreciated. Joakim Hove -- Joakim Hove hove AT ntnu.no/ Tlf: +47 (73 5)9 34 27/ Stabburveien 18 Fax: . / N-5231 Paradis http://www.ift.uib.no/~hove// 55 91 28 18 / 92 68 57 04 -- http://mail.python.org/mailman/listinfo/python-list
Re: where do you run database scripts/where are DBs 'located'?
On 5/13/06, Dennis Lee Bieber [EMAIL PROTECTED] wrote: On Fri, 12 May 2006 21:00:49 -0400, John Salerno[EMAIL PROTECTED] declaimed the following in comp.lang.python: Latest development: I turned off my firewall and it worked. :) Next step -- figure out what rule you need to define to the firewallto permit it to work...--WulfraedDennis Lee Bieber KD6MOG [EMAIL PROTECTED] [EMAIL PROTECTED]HTTP://wlfraed.home.netcom.com/(Bestiaria Support Staff: [EMAIL PROTECTED])HTTP://www.bestiaria.com/-- http://mail.python.org/mailman/listinfo/python-listThe default port that the MySQL server listens on is 3306. This can be changed during install.-- Artificial Intelligence is no match for Natural Stupidity -- http://mail.python.org/mailman/listinfo/python-list
Re: Package that imports with name of dependent package
Peter Otten wrote: I'd appreciate hearing of what I can do in an __init__ file or what other strategy could make this work. Many thanks. I think fixing the imports is the better long-term approach. But putting from pkgutil import extend_path import mypackage __path__ = extend_path(mypackage.__path__, __name__) into dependentpackage/__init__.py might work. One big caveat: If you are mixing both import mypackage.somemodule and import dependentpackage.somemodule in the same application, mypackage.somemodule and dependentpackage.somemodule are *not* the same module instance. This may have surprising effects when global variables in somemodule.py are updated... Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: Package that imports with name of dependent package
Hi Peter. I'd like to fix the imports, but this would impact the portability of portions of the code that currently work with the existing package from the framework. This solution does the trick and allows me to create the package I want using a good amount of new material. I don't have to worry about adding to the original package each time a release comes out. I'll only have to monitor code changes for an impact on my classes, subclasses, etc. Still a pain, but a smaller one :-) Many thanks. Regards David Peter Otten wrote: from pkgutil import extend_path import mypackage __path__ = extend_path(mypackage.__path__, __name__) into dependentpackage/__init__.py might work. Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: Named regexp variables, an extension proposal.
Paddy [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]
Proposal: Named RE variables
==
The problem I have is that I am writing a 'good-enough' verilog tag
extractor as a long regular expression (with the 'x' flag for
readability), and find myself both
1) Repeating sections of the RE, and
2) Wanting to add '(?Psome_clarifier...) ' around sections
because I know what the section does but don't really want
the group.
If I could write:
(?P/verilog_name/ [A-Za-z_][A-Za-z_0-9\$\.]* | \\\S+ )
...and have the RE parser extract the section of RE after the second
'/' and store it associated with its name that appears between the
first two '/'. The RE should NOT try and match against anything between
the outer '(' ')' pair at this point, just store.
Then the following code appearing later in the RE:
(?P=verilog_name)
...should retrieve the RE snippet named and insert it into the RE
instead of the '(?P=...)' group before interpreting the RE 'as normal'
Instead of writing the following to search for event declarations:
vlog_extract = r'''(?smx)
# Verilog event definition extraction
(?: event \s+ [A-Za-z_][A-Za-z_0-9\$\.]* \s* (?: , \s*
[A-Za-z_][A-Za-z_0-9\$\.]*)* )
'''
I could write the following RE, which I think is clearer:
vlog_extract = r'''(?smx)
# Verilog identifier definition
(?P/IDENT/ [A-Za-z_][A-Za-z_0-9\$\.]* (?!\.) )
# Verilog event definition extraction
(?: event \s+ (?P=IDENT) \s* (?: , \s* (?P=IDENT))* )
'''
By contrast, the event declaration expression in the pyparsing Verilog
parser is:
identLead = alphas+$_
identBody = alphanums+$_
#~ identifier = Combine( Optional(.) +
#~ delimitedList( Word(identLead, identBody), .,
combine=True ) ).setName(baseIdent)
# replace pyparsing composition with Regex - improves performance ~10% for
this construct
identifier = Regex(
r\.?[+identLead+][+identBody+]*(\.[+identLead+][+identBody+]*)* ).
setName(baseIdent)
eventDecl = Group( event + delimitedList( identifier ) + semi )
But why do you need an update to RE to compose snippets? Especially
snippets that you can only use in the same RE? Just do string interp:
I could write the following RE, which I think is clearer:
vlog_extract = r'''(?smx)
# Verilog identifier definition
(?P/IDENT/ [A-Za-z_][A-Za-z_0-9\$\.]* (?!\.) )
# Verilog event definition extraction
(?: event \s+ (?P=IDENT) \s* (?: , \s* (?P=IDENT))* )
'''
IDENT = [A-Za-z_][A-Za-z_0-9\$\.]* (?!\.)
vlog_extract = r'''(?smx)
# Verilog event definition extraction
(?: event \s+ %(IDENT)s \s* (?: , \s* %(IDENT)s)* )
''' % locals()
Yuk, this is a mess - which '%' signs are part of RE and which are for
string interp? Maybe just plain old string concat is better:
IDENT = [A-Za-z_][A-Za-z_0-9\$\.]* (?!\.)
vlog_extract = r'''(?smx)
# Verilog event definition extraction
(?: event \s+ ''' + IDENT + ''' \s* (?: , \s* ''' + IDENT + ''')* )'''
By the way, your IDENT is not totally accurate - it does not permit a
leading ., and it does permit leading digits in identifier elements after
the first .. So .goForIt would not be matched as a valid identifier
when it should, and go.4it would be matched as valid when it shouldn't (at
least as far as I read the Verilog grammar).
(Pyparsing (http://sourceforge.net/projects/pyparsing/) is open source under
the MIT license. The Verilog grammar is not distributed with pyparsing, and
is only available free for noncommercial use.)
-- Paul
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Factory pressed dvd movies, ps2, psp xbox backups for sale !!!
We're offering all the latest factory pressed high quality dvd movies, ps2, psp and xbox silvers with factory printed colour inserts at fantastic prices, whether for personal use or reselling. We're shipping worldwide with various shipping methods. For resellers, please contact us for bulk discounts. For a complete list and prices, please email us at [EMAIL PROTECTED] (Please state the type of list that you want and tell us your location as the prices varies for different locations. If you're reseller, please state the quantity you wish to order per shipment and we'll quote you a wholesale price depending on the quantity ordered.) * If you need references, we can provide them to you. -- http://mail.python.org/mailman/listinfo/python-list
Re: Package that imports with name of dependent package
Hi Peter. Thank you for this warning. I'll document this in the code. I plan on importing only from dependentpackage for portability. Also, much in the framework relies upon it. This approach is primarily for maintenance purposes and would also allow me to package the modified dependentpackage (with just the __init__.py ) along with mypackage if I plan to distribute it. It allows it to be a drop in replacement. I am hoping with packaging utilities, I can easily remove the dependentpackage if it is encountered in site-packages to replace it with my own. Regards, David Peter Otten wrote: Peter Otten wrote: I'd appreciate hearing of what I can do in an __init__ file or what other strategy could make this work. Many thanks. I think fixing the imports is the better long-term approach. But putting from pkgutil import extend_path import mypackage __path__ = extend_path(mypackage.__path__, __name__) into dependentpackage/__init__.py might work. One big caveat: If you are mixing both import mypackage.somemodule and import dependentpackage.somemodule in the same application, mypackage.somemodule and dependentpackage.somemodule are *not* the same module instance. This may have surprising effects when global variables in somemodule.py are updated... Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: Slovenian Python User Group
Sebastjan Trepca wrote: Hi! just wanted to send a notice about a new portal/group for Slovenian Python fans here :) http://soup.zen.si (btw, it's in slovene lang) But why is SOUP (Slovenski Ortodoksni Uporabniki Pythona) used as an acronym? Or is SOUP a word in Slovene also? Sebastjan -- http://mail.python.org/mailman/listinfo/python-list
PyX on Windows
Hi,
I'm trying to use PyX to draw some diagrams with text in. I want to
change the font, so need to change the text mode from TeX to LaTeX.
However I get an error when I do so:
pyx.text.TexResultError: unhandled TeX response (might be an error)
The expression passed to TeX was:
\documentclass{article}%
\PyXInput{3}%
After parsing the return message from TeX, the following was left:
*
*(C:\Program Files\MiKTeX\tex\latex\base\article.cls
Document Class: article 2004/02/16 v1.4f Standard LaTeX document
class
(C:\Program Files\MiKTeX\tex\latex\base\size10.clo))
I'm using MikTek on Windows to run LaTeX; does anyone know if is this
likely to be the problem?
Many thanks,
Tom
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Setting up InformixDb
I have an informix database on a unix machine which I want to access. I downloaded InformixDb-2.2 and managed to get it built and installed and it works fine with python. My problem is I want to access the same database from a PC remotely. Yes, I already have informix setup and configured on the unix machine to accept connections remotely. And, I can connect to it fine from an ODBC interface to Excel and Access. But, to build the informix module requires the INFORMIXDIR environment variable set to it which I don't believe I can set to a remote machine. So, how can I get this module built without having an informix installed on my PC? Thanks. Ken -- http://mail.python.org/mailman/listinfo/python-list
Re: problemi con POST
Heavy [EMAIL PROTECTED] wrote: Sorry, you got reason, I thought I can write in my language, cause this is the first time that I post a question in this group... My problem is that I have to receive parameters from a POST method, i try to read them from the socket 'rfile', but this action is blocking, it never finish to read. Is there some existing method that can help me? Can you help me? thanks... Post your question to it.comp.lang.python -- THAT is an Italian newsgroup for Python. Poni la domanda su it.comp.lang.python -- QUELLO e` un newsgroup italiano per Python. Alex -- http://mail.python.org/mailman/listinfo/python-list
Re: compiling module from string and put into namespace
I dont want the caller to call import but a function. come again? type (__builtins__.__import__) type 'builtin_function_or_method' I didnt mean that __import__ isnt a function, but that I want to make a function called ImoprtFile that actually does something very similar that what __import__. So to rephrsase the questin how does __import__ load a module into the callers namespace. Example: file1 def ImportFile(fileName): parsedCode = Parser(fileName).Parse() module = new.module(name) exec parsedCode in module.__dict__ sys.modules[name] = module import name #!!! This doesn't work. Imports in file1 namespace! file2 import file1 file1.ImportFile(fileName) fileName.function() #This wont work because the import happened locally in file1! Now the import in file1 doesnt take effect in file2. So what do I have to do to make that work. And I dont want to do a custom hook to import. So how does __import__ do? -- http://mail.python.org/mailman/listinfo/python-list
Re: where do you run database scripts/where are DBs 'located'?
Dennis Lee Bieber wrote: On Fri, 12 May 2006 21:00:49 -0400, John Salerno [EMAIL PROTECTED] declaimed the following in comp.lang.python: Latest development: I turned off my firewall and it worked. :) Next step -- figure out what rule you need to define to the firewall to permit it to work... Yeah, that's actually what I'm trying to do now. I'm not sure how to define it, but I assume it has something to do with 3306, since that's the default. I remember when I first installed MySQL on my computer, it would never get past the configuration wizard, also because of a port/firewall issue. So I uninstalled it, and then reinstalled it with the firewall off and it worked fine. And this works fine too with the firewall off, I just need to figure out what the criteria are for the new rule I need. -- http://mail.python.org/mailman/listinfo/python-list
Re: where do you run database scripts/where are DBs 'located'?
BartlebyScrivener wrote: John, Yep, different module. I'll watch the thread. Perhaps once you get connected, we should make a mini-HOWTO for XP users while it's fresh in your mind, because this question seems to come up a lot, and beginners would probably appreciate a short howto that would perhaps detail how to set up either mysqldb, mxodbc, or both on XP and get Python talking to MySQL. I think no matter which you choose, you will benefit from downloading the mysql connector and adding your mysql db to datasources on XP. Then you can access the db just by using the name you gave it in the datasources panel, e.g. driv=bbdatabank rick Well, I'm not too sure I need to do this now. The problem wasn't anything to do with mysqldb after all, it was just that my firewall wasn't allowing the connection. But with the firewall off, everything seems to work fine. -- http://mail.python.org/mailman/listinfo/python-list
Re: Sending mail with attachment...
Merrigan wrote: mesg['To'] = recievelist It's already been pointed out that this is a problem, but I just wanted to mention also that 'recieve' is misspelled, in case that affects anything, or others who might read/use the code. -- http://mail.python.org/mailman/listinfo/python-list
Re: where do you run database scripts/where are DBs 'located'?
But with the firewall off, everything seems to work fine. Whatever works. But I'm having trouble imagining how a firewall would interfere with you accessing your own db on localhost. -- http://mail.python.org/mailman/listinfo/python-list
Re: compiling module from string and put into namespace
Ok, now I think I know what I need to do. I need to create a variable in the calling functions locals. So how do I get access to the calles locals dictionary? Is it possible? -- http://mail.python.org/mailman/listinfo/python-list
Re: SystemError: ... cellobject.c:22: bad argument to internal ?
robert wrote: From the trace of a 2.3.5 software i got: \'SystemError: C:sfpythondist23srcObjectscellobject.c:22: bad argument to internal function\\n\'] ... Will there be another bug-fix release of Python 2.3 ? No, is this still a problem in 2.4? 2.4.4 is planned to be released this summer. Can you post the entire code (that doesn't reference anything outside the stdlib) that causes this problem? n -- http://mail.python.org/mailman/listinfo/python-list
Re: compiling module from string and put into namespace
glomde wrote: I didnt mean that __import__ isnt a function, but that I want to make a function called ImoprtFile that actually does something very similar that what __import__. So to rephrsase the questin how does __import__ load a module into the callers namespace. Ok got it now. I'm sure it's doable but it sounds tricky. Wouldn't it be easier to just have your function return a list of modules to the caller and have the caller import them? -- Edward Elliott UC Berkeley School of Law (Boalt Hall) complangpython at eddeye dot net -- http://mail.python.org/mailman/listinfo/python-list
Re: distributing a app frozen by cx_freeze
Flavio wrote: Well I managed to get rid of the undefined symbol message by copying all qt libs to the freeze directory, the problem is that now the package is huge (83MB)! So my question is: is there a way to find out exactly which lib is missing ? You know, if you're doing this on Linux, it's not all that unreasonable to require QT to be installed on the target system. Any reasonable distribution has it nicely packaged. But, if you must, ldd qt.so will list library dependencies of qt.so. Carl Banks -- http://mail.python.org/mailman/listinfo/python-list
Re: where do you run database scripts/where are DBs 'located'?
BartlebyScrivener wrote: But with the firewall off, everything seems to work fine. Whatever works. But I'm having trouble imagining how a firewall would interfere with you accessing your own db on localhost. I don't know either. Something to do with the ports it's trying to use I guess. -- http://mail.python.org/mailman/listinfo/python-list
[ANN] PanDAV on SourceForge.net
Around three weeks ago there was a thread about Python WebDAV servers, and I mentioned my PanDAV work (old homepage: http://ivoras.sharanet.org/projects/pandav.html). There was some interest in continuing the development and merging patches made by its users, so I requested a SourceForge project for it. Due to some internal delay in SourceForget it took a while until the project was created, but now it's there! The project's home is http://sourceforge.net/projects/pandav/. If any of the thread's original posters (or anyone else) are interested, please create a SourceForge.net account and contact me. The current version in CVS contains code and patches (for better compatibility with Windows XP) which is not present in the original package. -- http://mail.python.org/mailman/listinfo/python-list
Re: Slow network reading?
Ivan Voras wrote: Andrew MacIntyre wrote: Comparative CPU memory utilisation statistics, not to mention platform and version of Python, would be useful hints... During benchmarking, all versions cause all CPU to be used, but Python version has ~1.5x more CPU time allocated to it than PHP. Python is 2.4.1 A pretty fair indication of the Python interpreter doing a lot more work... Note that the file-like object returned by makefile() has significant portions of heavy lifting code in Python rather than C which can be a drag on ultimate performance... If on a Unix platform, it may be worth experimenting with os.fdopen() on the socket's fileno() to see whether the core Python file object (implemented in C) can be used in place of the lookalike returned from the makefile method. That's only because I need the .readline() function. In C, I'm using fgets() (with the expectation that iostream will buffer data). The readline method of the file object lookalike returned by makefile implements all of the line splitting logic in Python code, which is very likely where the extra process CPU time is going. Note that this code is in Python for portability reasons, as Windows socket handles cannot be used as file handles the way socket handles on Unix systems can be. If you are running on Windows, a fair bit of work will be required to improve performance as the line splitting logic needs to be moved to native code - I wonder whether psyco could do anything with this?. Even without that, you are specifying a buffer size smaller than the default (8k - see Lib/socket.py). 16k might be even better. The benchmark is such that all of data is 200 bytes. I estimate that in production almost all protocol data will be 4KB. A matter of taste perhaps, but that seems to me like another reason not to bother with a non-default buffer size. Although they're only micro-optimisations, I'd be interested in the relative performance of the query method re-written as: The change (for the better) is minor (3-5%). Given your comments above about how much data is actually involved, I'm a bit surprised that the tweaked version actually produced a measurable gain. - Andrew I MacIntyre These thoughts are mine alone... E-mail: [EMAIL PROTECTED] (pref) | Snail: PO Box 370 [EMAIL PROTECTED] (alt) |Belconnen ACT 2616 Web:http://www.andymac.org/ |Australia -- http://mail.python.org/mailman/listinfo/python-list
Re: compiling module from string and put into namespace
glomde wrote: Ok, now I think I know what I need to do. I need to create a variable in the calling functions locals. So how do I get access to the calles locals dictionary? Is it possible? If your import is used in the current namespace, just use the global keyword. Best is if your function just returns the module though, and then you have bound your name to it exactly as if you had used import. If you *really* want to poke it into the globals of whereever your function is called from, you can use : sys._getframe(1).globals['name'] = name (or something like that, you will need to look up the semantics.) This is a hack really though, just return the module object and bind the right name to it where you call it from. Fuzzyman http://www.voidspace.org.uk/python/index.shtml -- http://mail.python.org/mailman/listinfo/python-list
Re: unzip zip files
On May 12, 2006, at 5:45 PM, DataSmash wrote:
I need to unzip all zip file(s) in the current directory
into their own subdirectories. The zip file name(s) always
start with the string usa and end with .zip.
The code below will make the subdirectory, move the zip
file into the subdirectory, but unzips the contents into the
root (current) directory. I want the contents of the zip file
unloaded into the newly created subdirectory where the zip file is.
Any ideas?
Thanks.
R.D.
import subprocess
# Get all the zip files in the current directory.
for zip in os.listdir(''):
if zip.endswith(.zip):
# Remove the first 3 and the last 4 characters
# e.g. usa12345.zip becomes 12345
zipBase = zip[3:-4]
# Make directory for unzipping
os.mkdir(zipBase)
# Move the zip file to the subdirectory
shutil.move(zip, zipBase)
# Make system call unzip
subprocess.Popen([unzip, zipBase + \\ + zip]).wait()
Ouch... Is there any reason that you're using subprocess+'unzip', as
opposed to using the 'zipfile' module from the standard library?
Jay P.
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Re: Slow network reading?
Andrew MacIntyre wrote: That's only because I need the .readline() function. In C, I'm using fgets() (with the expectation that iostream will buffer data). The readline method of the file object lookalike returned by makefile implements all of the line splitting logic in Python code, which is very likely where the extra process CPU time is going. Note that this code is Heh, I didn't know that - you're probably right about this being a possible bottleneck. in Python for portability reasons, as Windows socket handles cannot be used as file handles the way socket handles on Unix systems can be. I think they actually can in NT and above... but no, I'm doing it on Unix. Given your comments above about how much data is actually involved, I'm a bit surprised that the tweaked version actually produced a measurable gain. I didn't do statistical analysis of the results so the difference actually could be negligable IRL. Anyway, thanks for the advice - I'll leave it as it is, as the Python client is not used currently. -- Things Mr Welch Cannot Do During An RPG: 274. I cannot commune with the Gods during peak hours. -- http://mail.python.org/mailman/listinfo/python-list
Re: Setting up InformixDb
On Sat, 13 May 2006 14:09:19 -0400, The Shaffer s wrote I have an informix database on a unix machine which I want to access. I downloaded InformixDb-2.2 and managed to get it built and installed and it works fine with python. My problem is I want to access the same database from a PC remotely. Yes, I already have informix setup and configured on the unix machine to accept connections remotely. And, I can connect to it fine from an ODBC interface to Excel and Access. But, to build the informix module requires the INFORMIXDIR environment variable set to it which I don't believe I can set to a remote machine. So, how can I get this module built without having an informix installed on my PC? On the PC, you'll have to install either the Informix Client SDK (http://www.ibm.com/software/data/informix/tools/csdk/) or Informix Connect (http://www.ibm.com/software/data/informix/tools/connect/). Both are free downloads. If you plan on building InformixDB from source, you'll need CSDK. If you want to simply use a pre-built binary, such as the one I provide at Sourceforge, either CSDK or Informix Connect will do. In either case, INFORMIXDIR on the PC should point to where you installed the Informix client software, and INFORMIXSERVER points to the server instance you're connecting to. Hope this helps, Carsten. -- http://mail.python.org/mailman/listinfo/python-list
Iterating generator from C
Hi,
I am working on project that has embedded python interpreter to run
user-specified python procedures. Those procedures might return any
iterable object with set of result data -- basically everything for which
iter() returns valid object (list, tuple, dict, iterator etc)
It works ok, except generator under Python 2.4 with debugging enabled (see
http://sourceforge.net/tracker/index.php?func=detailaid=1483133group_id=5470atid=105470).
Is there any way to rewrite following program to handle returned generator
without hitting this bug?
Error handling is omitted for clarity.
#include Python.h
const char *py_source =
def fn():\n
yield 1\n;
int main ()
{
Py_Initialize();
PyObject *globals = PyDict_New();
// insert function code into interpreter
PyObject *code = PyRun_String(py_source, Py_file_input, globals, NULL);
Py_DECREF(code);
// do call
code = Py_CompileString(fn(), string, Py_eval_input);
PyObject *gen = PyEval_EvalCode((PyCodeObject *)code, globals, NULL);
// iterate result
PyObject *item;
while ((item = PyIter_Next(gen))) {
printf( %ld\n, PyInt_AsLong(item));
Py_DECREF(item);
}
Py_DECREF(gen);
Py_DECREF(code);
Py_DECREF(globals);
Py_Finalize();
return 0;
}
Br,
--
Sven Suursoho
--
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LocaWapp 09 - localhost web applications
http://daviderognoni.blogspot.com?locawapp - MAIN NEWS === * add thread * add Request object * new locawapp_main function * fixed files.py * ... http://daviderognoni.blogspot.com?locawapp -- http://mail.python.org/mailman/listinfo/python-list
Re: distributing a app frozen by cx_freeze
I know, but the whole point of cx_freeze is to generate standalone executables, so asking for an installation of an specific version of Qt is just a little better than asking the end user to install from source... -- http://mail.python.org/mailman/listinfo/python-list
retain values between fun calls
Hi
the second argument in the functions below suppose to retain its value
between function calls, the first does, the second does not and I
would like to know why it doesn't? and how to make it so it does?
thanks
# it does
def f(a, L=[]):
L.append(a)
return L
print f('a')
print f('b')
# it does not
def f(a, b=1):
b = a + b
return b
print f(1)
print f(2)
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cx_freeze and matplotlib
I am trying to freeze an application which imports matplotlib. It all works fine on the machine where it was frozen. The executable runs without a glitch. But when I move the directory containing the frozen executable and other libs to a new machine, I get the following error: Traceback (most recent call last): File /home/fccoelho/Downloads/cx_Freeze-3.0.2/initscripts/Console.py, line 26, in ? File epigrass.py, line 5, in ? File Epigrass/manager.py, line 7, in ? File Epigrass/simobj.py, line 4, in ? File /usr/lib/python2.4/site-packages/matplotlib/__init__.py, line 457, in ? try: return float(s) File /usr/lib/python2.4/site-packages/matplotlib/__init__.py, line 245, in wrapper if level not in self.levels: File /usr/lib/python2.4/site-packages/matplotlib/__init__.py, line 319, in _get_data_path Return the string representing the configuration dir. If s is the RuntimeError: Could not find the matplotlib data files Matplotlib can't find its data files. Apparently this problem comes up in py2exe as well and it is handled like this: from distutils.core import setup import glob import py2exe data = glob.glob(r'C:\Python23\share\matplotlib\*') data.append(r'C:\Python23\share\matplotlib\matplotlibrc') setup( console= [simple_plot.py], data_files = [(matplotlibdata, data)], ) This is the only thing I need to solve before I can distribute my frozen package, so please help me here. There must be a way since the frozen works in the original machine but not on the new Which also has the same version of matplotib installed. -- http://mail.python.org/mailman/listinfo/python-list
Cellular automata and image manipulation
Hello. I have recently been experimenting with cellular automata and I would like to know how I could convert a 2d list of 0's and 1's into white and black squares on an image. I have tried to install matplotlib and also NumTut but both to no avail. There seem to be bugs in their installation and I have not been able to figure out how to resolve them. I would be happy for someone to suggest a library and maybe give a simple example of how to do what I want to do. -- http://mail.python.org/mailman/listinfo/python-list
Re: Cellular automata and image manipulation
[EMAIL PROTECTED] wrote: Hello. I have recently been experimenting with cellular automata and I would like to know how I could convert a 2d list of 0's and 1's into white and black squares on an image. I have tried to install matplotlib and also NumTut but both to no avail. There seem to be bugs in their installation and I have not been able to figure out how to resolve them. I would be happy for someone to suggest a library and maybe give a simple example of how to do what I want to do. Why don't you explain your problems with installing numpy (the Numeric Tutorial is out of date; don't bother with NumTut) or matplotlib on the appropriate mailing lists? http://lists.sourceforge.net/lists/listinfo/numpy-discussion http://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Robert Kern I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth. -- Umberto Eco -- http://mail.python.org/mailman/listinfo/python-list
Re: distributing a app frozen by cx_freeze
Flavio wrote: ImportError: /home/flavio/freeze/qt.so: undefined symbol: _ZNK9QSGIStyle9classNameEv So my question is: is there a way to find out exactly which lib is missing ? yes - find the one with that symbol. wash, rinse, repeat. ;) -- Edward Elliott UC Berkeley School of Law (Boalt Hall) complangpython at eddeye dot net -- http://mail.python.org/mailman/listinfo/python-list
Re: Cellular automata and image manipulation
[EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Hello. I have recently been experimenting with cellular automata and I would like to know how I could convert a 2d list of 0's and 1's into white and black squares on an image. I have tried to install matplotlib and also NumTut but both to no avail. There seem to be bugs in their installation and I have not been able to figure out how to resolve them. I would be happy for someone to suggest a library and maybe give a simple example of how to do what I want to do. In my 1d cellular automaton, I used the python image library and import Image nim = Image.new(1, (height * 2, height)) nim.putdata(bimg) nim.resize((400,200)).save(output.png) where bimg is a 2d list of 0's and 1's. You could probably remove the resize. -- http://mail.python.org/mailman/listinfo/python-list
distutils and binding a script to a file extension on windows
Hi. I built a little installer on windows XP using distutils for my package. In there i add a few files to the python script directory. I would like one of these scripts to be the default program to be used by files with a given extention (e.g. i have an image viewer and would like it to be used when ever i click on a .gif file). I can do this manually (through Tools-Folder Options-File Types), but it would be nicer if the installer could configure this. It seems this may be possible through the postinstallation script of distutils, but i have no clue how to do this. does any have experience with this? i assume i need to edit the registry entries, but i dont know how or which ones. thx for any help alex. -- http://mail.python.org/mailman/listinfo/python-list
Re: having trouble importing a module from local directory
newbie reply, but how do i go about doing that? thanks! -- http://mail.python.org/mailman/listinfo/python-list
Question regarding checksuming of a file
Good evening, I need to generate checksums of a file, store the value in a variable, and pass it along for later comparison. The MD5 module would seem to do the trick but I'm sketchy on implementation. The nearest I can see would be import md5 m=md5.new() contents = open(self.file_name,rb).read() check=md5.update(contents) However this does not appear to be actually returning the checksum. Does anyone have insight into where I am going wrong? Any help you can provide would be greatly appreciated. Thanks -- http://mail.python.org/mailman/listinfo/python-list
Re: Question regarding checksuming of a file
Andrew Robert wrote: m=md5.new() contents = open(self.file_name,rb).read() check=md5.update(contents) However this does not appear to be actually returning the checksum. the docs are your friend, use them. hint: first you eat, then you... http://docs.python.org/lib/module-md5.html -- Edward Elliott UC Berkeley School of Law (Boalt Hall) complangpython at eddeye dot net -- http://mail.python.org/mailman/listinfo/python-list
Re: Question regarding checksuming of a file
Actually, I think I got it but would like to confirm this looks right. import md5 checksum = md5.new() mfn = open(self.file_name, 'r') for line in mfn.readlines(): checksum.update(line) mfn.close() cs = checksum.hexdigest() print cs The value cs should contain the MD5 checksum or did I miss something? Any help you can provide would be greatly appreciated. Thanks -- http://mail.python.org/mailman/listinfo/python-list
Re: Question regarding checksuming of a file
In article [EMAIL PROTECTED], Andrew Robert [EMAIL PROTECTED] wrote: Good evening, I need to generate checksums of a file, store the value in a variable, and pass it along for later comparison. The MD5 module would seem to do the trick but I'm sketchy on implementation. The nearest I can see would be import md5 m=md5.new() contents = open(self.file_name,rb).read() check=md5.update(contents) However this does not appear to be actually returning the checksum. Does anyone have insight into where I am going wrong? After calling update(), you need to call digest(). Update() only updates the internal state of the md5 state machine; digest() returns the hash. Also, for the code above, it's m.update(), not md5.update(). Update() is a method of an md5 instance object, not the md5 module itself. Lastly, the md5 algorithm is known to be weak. If you're doing md5 to maintain compatability with some pre-existing implementation, that's one thing. But, if you're starting something new from scratch, I would suggest using SHA-1 instead (see the sha module). SHA-1 is much stronger cryptographically than md5. The Python API is virtually identical, so it's no added work to switch to the stronger algorithm. -- http://mail.python.org/mailman/listinfo/python-list
Re: Question regarding checksuming of a file
Roy Smith wrote: However this does not appear to be actually returning the checksum. Does anyone have insight into where I am going wrong? After calling update(), you need to call digest(). Update() only updates the internal state of the md5 state machine; digest() returns the hash. Also, for the code above, it's m.update(), not md5.update(). Update() is a method of an md5 instance object, not the md5 module itself. Lastly, the md5 algorithm is known to be weak. If you're doing md5 to maintain compatability with some pre-existing implementation, that's one thing. But, if you're starting something new from scratch, I would suggest using SHA-1 instead (see the sha module). SHA-1 is much stronger cryptographically than md5. The Python API is virtually identical, so it's no added work to switch to the stronger algorithm. Hi Roy, This is strictly for checking if a file was corrupted during transit over an MQSeries channel. The check is not intended to be used for crypto purposes. -- http://mail.python.org/mailman/listinfo/python-list
Aggregate funuctions broken in MySQLdb?
I'm trying to use some of the agg functions in MySQLdb (avg, min, max), but they're just not working as I would expect. They all return the value 1 when executed as part of Python scripts, but work as expected when used in mysql 4.1. Does anyone have any experience using Python with MySQLdb? Quite frankly, the more I use it, the more MySQLdb seems to be not quite ready for prime time. -- My Break-Dancing days are over, but there's always the Funky Chicken --The Full Monty -- http://mail.python.org/mailman/listinfo/python-list
Re: How to install pyTrix?
Hi, PyTrix can be obtained from http://www.american.edu/econ/pytrix/pytrix.htm cheers! Claudio Grondi wrote: DeepBlue wrote: Hi all, can any1 please tell me how to install pyTrix? thx! The first step should be to get it, but how can it be got? Claudio -- http://mail.python.org/mailman/listinfo/python-list
Re: distributing a app frozen by cx_freeze
Flavio wrote: Well I managed to get rid of the undefined symbol message by copying all qt libs to the freeze directory, the problem is that now the package is huge (83MB)! So my question is: is there a way to find out exactly which lib is missing ? I haven't done that myself, but I've had an idea of discovering dependances for dynamic languages: run your test suite and register which files are loaded (byte code, dlls, datafiles), then remove from the list all files your know they were used only for testing, that's it, now you know all the files that you need to run your application. On linux you can find you which .so files are loaded by looking at file /proc/self/maps at the end of running your test suite. To find out which python bytecode files were loaded you can use -v option of python, it will print all files that were loaded to stderr, to separate its output from other stderr stuff, you can redirect sys.stderr to some other file. After you've done all that work, I'm not sure if you need cx_freeze. You just need to write little startup script that will set LD_LIBRARY_PATH, PYTHONPATH and start your main script. -- http://mail.python.org/mailman/listinfo/python-list
Re: cx_freeze and matplotlib
Flavio wrote: I am trying to freeze an application which imports matplotlib. It all works fine on the machine where it was frozen. The executable runs without a glitch. But when I move the directory containing the frozen executable and other libs to a new machine, I get the following error: Traceback (most recent call last): File /home/fccoelho/Downloads/cx_Freeze-3.0.2/initscripts/Console.py, line 26, in ? File epigrass.py, line 5, in ? File Epigrass/manager.py, line 7, in ? File Epigrass/simobj.py, line 4, in ? File /usr/lib/python2.4/site-packages/matplotlib/__init__.py, line 457, in ? try: return float(s) File /usr/lib/python2.4/site-packages/matplotlib/__init__.py, line 245, in wrapper if level not in self.levels: File /usr/lib/python2.4/site-packages/matplotlib/__init__.py, line 319, in _get_data_path Return the string representing the configuration dir. If s is the RuntimeError: Could not find the matplotlib data files Matplotlib can't find its data files. I'm not familiar with cx_freeze, but have you told cx_freeze that you don't want to bundle matplotlib or cx_freeze has decided that matplotlib is not going to be bundled? That fact that matplotlib is loaded from site-package is pretty strange, standalone application are not supposed to depend on non-system packages. -- http://mail.python.org/mailman/listinfo/python-list
Re: where do you run database scripts/where are DBs 'located'?
Dennis Lee Bieber wrote: On Sat, 13 May 2006 14:49:06 -0400, John Salerno [EMAIL PROTECTED] declaimed the following in comp.lang.python: Yeah, that's actually what I'm trying to do now. I'm not sure how to define it, but I assume it has something to do with 3306, since that's the default. What firewall application? Zone Alarm, that I use, pops up a warning that xyz is trying to act as a server -- I just had to configure it to allow server for local and block internet. Norton Internet Security. Usually it will pop up a warning and I can accept or decline it, but it doesn't do it in this case. It just won't connect to the database unless it's disabled. -- http://mail.python.org/mailman/listinfo/python-list
any plans to make pprint() a builtin?
Just wondering if this will ever happen, maybe in 3.0 when print becomes a function too? It would be a nice option to have it available without importing it every time, but maybe making it a builtin violates some kind of pythonic ideal? -- http://mail.python.org/mailman/listinfo/python-list
copying files into one
Hi I am looping through a directory and appending all the files in one huge file, the codes below should give the same end results but are not, I don't understand why the first code is not doing it. thanks combined = open(outputFile, 'wb') for name in flist: if os.path.isdir(file): continue infile = open(os.path.join(file), 'rb') # CODE 1 this does not work tx = infile.read(1000) if tx == : break combined.write(tx) infile.close() # CODE 2 but this works fine for line in infile: combined.write(line) infile.close() combined.close() -- http://mail.python.org/mailman/listinfo/python-list
Re: retain values between fun calls
Gary Wessle wrote:
Hi
the second argument in the functions below suppose to retain its value
between function calls, the first does, the second does not and I
would like to know why it doesn't? and how to make it so it does?
thanks
# it does
def f(a, L=[]):
L.append(a)
return L
print f('a')
print f('b')
# it does not
def f(a, b=1):
b = a + b
return b
print f(1)
print f(2)
It's a FAQ:
http://www.python.org/doc/faq/general/#why-are-default-values-shared-between-objects.
Whenever you want to control one or more objects beyond the lifetime of
a single function call, your first thought should be to use a class to
couple behaviour with state:
class SomeFancyClassName(object):
def __init__(self, b=1):
self.b = b
def f(self, a):
self.b += a
return self.b
x = SomeFancyClassName()
print x.f(1)
print x.f(2)
HTH,
George
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count items in generator
Still new. I am trying to make a simple word count script. I found this in the great Python Cookbook, which allows me to process every word in a file. But how do I use it to count the items generated? def words_of_file(thefilepath, line_to_words=str.split): the_file = open(thefilepath) for line in the_file: for word in line_to_words(line): yield word the_file.close() for word in words_of_file(thefilepath): dosomethingwith(word) The best I could come up with: def words_of_file(thefilepath, line_to_words=str.split): the_file = open(thefilepath) for line in the_file: for word in line_to_words(line): yield word the_file.close() len(list(words_of_file(thefilepath))) But that seems clunky. -- http://mail.python.org/mailman/listinfo/python-list
Re: copying files into one
Gary Wessle wrote: I am looping through a directory and appending all the files in one huge file, the codes below should give the same end results but are not, I don't understand why the first code is not doing it. combined = open(outputFile, 'wb') for name in flist: if os.path.isdir(file): continue infile = open(os.path.join(file), 'rb') this shouldn't work. 'file' is a type object, not a filename. did you rebind 'file' without showing us? or should those 'file's be 'name's instead? in either case, calling os.path.join with one argument is pointless. # CODE 1 this does not work tx = infile.read(1000) if tx == : break combined.write(tx) infile.close() hint: where will break take you? therein lies your answer. -- Edward Elliott UC Berkeley School of Law (Boalt Hall) complangpython at eddeye dot net -- http://mail.python.org/mailman/listinfo/python-list
Re: copying files into one
Gary Wessle wrote: I am looping through a directory and appending all the files in one huge file, the codes below should give the same end results but are not, I don't understand why the first code is not doing it. another bit of friendly advice (for others as well): learn to use pdb before posting your code for the group to debug. this type of error is easily catchable with a little effort. you'll learn more by investigating your problems yourself before feeding them to the great distributed debugger known as comp.lang.python. -- Edward Elliott UC Berkeley School of Law (Boalt Hall) complangpython at eddeye dot net -- http://mail.python.org/mailman/listinfo/python-list
do/while structure needed
1 random.shuffle(letters) 2 trans_letters = ''.join(letters)[:len(original_set)] 3 trans_table = string.maketrans(original_set, trans_letters) So what I'd like to do is have lines 1 and 2 run once, then I want to do some comparison between original_set and trans_letters before running line 3. If the comparison passes, line 3 runs; otherwise, lines 1 and 2 run again. A do/while would be good for this, but perhaps I'm looking at it in the wrong way? Or is there some kind of do/while type of idiom that I could use? Thanks. -- http://mail.python.org/mailman/listinfo/python-list
Re: count items in generator
BartlebyScrivener [EMAIL PROTECTED] wrote: Still new. I am trying to make a simple word count script. I found this in the great Python Cookbook, which allows me to process every word in a file. But how do I use it to count the items generated? def words_of_file(thefilepath, line_to_words=str.split): the_file = open(thefilepath) for line in the_file: for word in line_to_words(line): yield word the_file.close() for word in words_of_file(thefilepath): dosomethingwith(word) The best I could come up with: def words_of_file(thefilepath, line_to_words=str.split): the_file = open(thefilepath) for line in the_file: for word in line_to_words(line): yield word the_file.close() len(list(words_of_file(thefilepath))) But that seems clunky. My preference would be (with the original definition for words_of_the_file) to code numwords = sum(1 for w in words_of_the_file(thefilepath)) Alex -- http://mail.python.org/mailman/listinfo/python-list
Re: count items in generator
BartlebyScrivener wrote: Still new. I am trying to make a simple word count script. I found this in the great Python Cookbook, which allows me to process every word in a file. But how do I use it to count the items generated? def words_of_file(thefilepath, line_to_words=str.split): the_file = open(thefilepath) for line in the_file: for word in line_to_words(line): yield word the_file.close() for word in words_of_file(thefilepath): dosomethingwith(word) The best I could come up with: def words_of_file(thefilepath, line_to_words=str.split): the_file = open(thefilepath) for line in the_file: for word in line_to_words(line): yield word the_file.close() len(list(words_of_file(thefilepath))) But that seems clunky. As clunky as it seems, I don't think you can beat it in terms of brevity; if you care about memory efficiency though, here's what I use: def length(iterable): try: return len(iterable) except: i = 0 for x in iterable: i += 1 return i You can even shadow the builtin len() if you prefer: import __builtin__ def len(iterable): try: return __builtin__.len(iterable) except: i = 0 for x in iterable: i += 1 return i HTH, George -- http://mail.python.org/mailman/listinfo/python-list
Re: count items in generator
Thanks! And thanks for the Cookbook. rd There is no abstract art. You must always start with something. Afterward you can remove all traces of reality.--Pablo Picasso -- http://mail.python.org/mailman/listinfo/python-list
Re: do/while structure needed
John Salerno wrote: 1 random.shuffle(letters) 2 trans_letters = ''.join(letters)[:len(original_set)] 3 trans_table = string.maketrans(original_set, trans_letters) So what I'd like to do is have lines 1 and 2 run once, then I want to do some comparison between original_set and trans_letters before running line 3. If the comparison passes, line 3 runs; otherwise, lines 1 and 2 run again. A do/while would be good for this, but perhaps I'm looking at it in the wrong way? Or is there some kind of do/while type of idiom that I could use? Thanks. I guess you want something like: while True: random.shuffle(letters) trans_letters = ''.join(letters)[:len(original_set)] if some_compatison(original_set,trans_letters): trans_table = string.maketrans(original_set, trans_letters) break HTH, George -- http://mail.python.org/mailman/listinfo/python-list
Re: count items in generator
George Sakkis [EMAIL PROTECTED] writes: As clunky as it seems, I don't think you can beat it in terms of brevity; if you care about memory efficiency though, here's what I use: def length(iterable): try: return len(iterable) except: i = 0 for x in iterable: i += 1 return i Alex's example amounted to something like that, for the generator case. Notice that the argument to sum() was a generator comprehension. The sum function then iterated through it. -- http://mail.python.org/mailman/listinfo/python-list
[ python-Feature Requests-1487389 ] datetime.time and datetime.timedelta
Feature Requests item #1487389, was opened at 2006-05-12 13:13 Message generated for change (Comment added) made by fresh You can respond by visiting: https://sourceforge.net/tracker/?func=detailatid=355470aid=1487389group_id=5470 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Python Library Group: None Status: Open Resolution: None Priority: 5 Submitted By: Chris Withers (fresh) Assigned to: Nobody/Anonymous (nobody) Summary: datetime.time and datetime.timedelta Initial Comment: print datetime.time(hour=0)+datetime.timedelta(hours=1) ...gives... TypeError: unsupported operand type(s) for +: 'datetime.time' and 'datetime.timedelta' Which is a bit frustrating :-/ Does it really need to be this way? Chris -- Comment By: Chris Withers (fresh) Date: 2006-05-13 15:49 Message: Logged In: YES user_id=24723 Well, I think the OverflowError is perfectly correct, and lets the software author handle that situation in any way they want. That said, you could add a keyword option to the datetime.time constructor to allow it either to wrap round, or raise OverflowError, with the overflow being the default. If I resulted up patches for these, how would I get them into a python release? -- Comment By: Tim Peters (tim_one) Date: 2006-05-12 16:15 Message: Logged In: YES user_id=31435 Since the lack of arithmetic on `time` objects is both intended and documented, this isn't a bug. I moved this to the Feature Requests tracker. The problem with arithmetic on time objects is that it's not obvious what to do in case of overflow or underflow: wrap around or raise OverflowError? Either way violates _some_ reasonable expectation. Embed your time in a `datetime` object and then you can decide what you want to do. For example, if you want to wrap around, print (datetime.combine(date.today(), time(hour=0)) - timedelta(hours=1)).time() 23:00:00 -- You can respond by visiting: https://sourceforge.net/tracker/?func=detailatid=355470aid=1487389group_id=5470 ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[ python-Bugs-1487966 ] SystemError with conditional expression in assignment
Bugs item #1487966, was opened at 2006-05-13 18:25 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detailatid=105470aid=1487966group_id=5470 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Parser/Compiler Group: Python 2.5 Status: Open Resolution: None Priority: 5 Submitted By: iga Seilnacht (zseil) Assigned to: Nobody/Anonymous (nobody) Summary: SystemError with conditional expression in assignment Initial Comment: When a conditional expression appears on the left side of an assignment, SystemError is raised instead of SyntaxError. Example: Python 2.5a2 (trunk:45989M, May 13 2006, 15:40:42) [MSC v.1310 32 bit (Intel)] on win32 a if True else b = 3 SystemError: unexpected expression in assignment 5 (line 1) -- You can respond by visiting: https://sourceforge.net/tracker/?func=detailatid=105470aid=1487966group_id=5470 ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[ python-Bugs-944394 ] No examples or usage docs for urllib2
Bugs item #944394, was opened at 2004-04-29 13:02 Message generated for change (Comment added) made by loewis You can respond by visiting: https://sourceforge.net/tracker/?func=detailatid=105470aid=944394group_id=5470 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Python Library Group: None Status: Closed Resolution: Works For Me Priority: 5 Submitted By: Chris Withers (fresh) Assigned to: Nobody/Anonymous (nobody) Summary: No examples or usage docs for urllib2 Initial Comment: Hi there, I'm sure I reported this before, but it's a couple of major releases later, and there's still no usage docs for urllib2. The examples given are too trivial to be helpful, but I'm guessing people are using the module so there must be some examples out there somewhere ;-) With a bit o fhelp from Moshez, I found the docstring in the module source. At the very least, it'd be handy if that appeared somewhere at: http://docs.python.org/lib/module-urllib2.html But really, mroe extensive and helpful documentation on this cool new module would be very handy. Chris -- Comment By: Martin v. Löwis (loewis) Date: 2006-05-13 18:33 Message: Logged In: YES user_id=21627 fresh, you haven't responded to jjlee's questions from 2006-04-17 16:26, so it is unclear what precisely it is that you want. In absence of a specific problem description, I'm closing this as works for me. -- Comment By: Chris Withers (fresh) Date: 2006-05-13 17:51 Message: Logged In: YES user_id=24723 wtf? -- Comment By: SourceForge Robot (sf-robot) Date: 2006-05-12 04:21 Message: Logged In: YES user_id=1312539 This Tracker item was closed automatically by the system. It was previously set to a Pending status, and the original submitter did not respond within 14 days (the time period specified by the administrator of this Tracker). -- Comment By: Georg Brandl (gbrandl) Date: 2006-04-27 15:06 Message: Logged In: YES user_id=849994 Chris, I concur with jjlee that suggesting examples is the best way to get something done. Perhaps, if you're using urllib2, you could flesh out some examples from your code? -- Comment By: John J Lee (jjlee) Date: 2006-04-17 16:26 Message: Logged In: YES user_id=261020 Do you have any specific suggestions for what is unhelpful and/or missing? Otherwise, nothing is likely to change. Note that a little was added at the bottom of this page in 2.4, explaining how OpenerDirector uses the handlers to open URLs: http://docs.python.org/lib/opener-director-objects.html Looking at the top-level page, I guess an introduction / overview would help? Did you have other stuff in mind too? -- Comment By: Chris Withers (fresh) Date: 2006-04-17 16:19 Message: Logged In: YES user_id=24723 I still feel there could be more. I guess the best course, for me, would be to leave this open but at a really low priority. However, I probably wouldn't scream too much if the issue was closed. -- Comment By: John J Lee (jjlee) Date: 2006-04-15 20:49 Message: Logged In: YES user_id=261020 They are here: http://docs.python.org/lib/urllib2-examples.html -- Comment By: Chris Withers (fresh) Date: 2006-04-15 20:07 Message: Logged In: YES user_id=24723 Where are these examples you're referring to? I don't see any at: http://docs.python.org/lib/module-urllib2.html I've already commented that the existing ones in the docstring would be a start but still don't really much help in taking full advantage of this module. -- Comment By: John J Lee (jjlee) Date: 2006-04-15 19:34 Message: Logged In: YES user_id=261020 Examples for urllib2 were added some time ago, so I suggest this bug is closed. -- Comment By: Chris Withers (fresh) Date: 2004-06-01 10:17 Message: Logged In: YES user_id=24723 I'm certainly willing, but I am totally incapable :-S The reason I opened this issue is because it would seem that urllib2 is better the urllib, but seems to be severely underdocumented, and hence I don't understand how to use it and so can't provide examples. As I said in the original submission, including the module's docstring in the Python module documentation would be a start, but doesn't cover what appears to be the full potential of a
[ python-Bugs-1487481 ] Could BIND_FIRST be removed on HP-UX?
Bugs item #1487481, was opened at 2006-05-12 17:32 Message generated for change (Comment added) made by loewis You can respond by visiting: https://sourceforge.net/tracker/?func=detailatid=105470aid=1487481group_id=5470 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Python Interpreter Core Group: Python 2.4 Status: Open Resolution: None Priority: 5 Submitted By: Göran Uddeborg (goeran) Assigned to: Guido van Rossum (gvanrossum) Summary: Could BIND_FIRST be removed on HP-UX? Initial Comment: I'm trying to build Python 2.4.3 on HP-UX 11. I need tkinter, so I have first built Tcl and Tk 8.4.13. During the build, the python interpreter crashes. When running the setup.py script, just after making the _tkinter.sl module, it crashes with a memory fault. I've tried to investigate this, and it seems that malloc and friends gets confused by the dynamic loading. I've filed a support request with HP about this. One observation I made is that this malloc bug seems to be connected with the use of BIND_FIRST in dynload_hpux.c. If I just remove this flag (in two places) it appears as if Python works normally. I'm hesitant if this is a good idea. BIND_FIRST is there as an explicit, non-default, flag. Somebody must have choosen to do so for some reason. What was that reason? And is it still valid? If not, maybe the flag could be removed, and this problem in HP-UX be avoided? -- Comment By: Martin v. Löwis (loewis) Date: 2006-05-13 18:38 Message: Logged In: YES user_id=21627 BIND_FIRST was added with this commit: r7068 | guido | 1996-12-06 00:15:35 +0100 (Fr, 06 Dez 1996) | 2 lines Geänderte Pfade: M /python/trunk/Python/importdl.c Some extra flags that an HPUX user wants me to add. Guido, do you have any records on which user that was and why he wanted these flags to be added? -- You can respond by visiting: https://sourceforge.net/tracker/?func=detailatid=105470aid=1487481group_id=5470 ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[ python-Bugs-944394 ] No examples or usage docs for urllib2
Bugs item #944394, was opened at 2004-04-29 12:02 Message generated for change (Comment added) made by jjlee You can respond by visiting: https://sourceforge.net/tracker/?func=detailatid=105470aid=944394group_id=5470 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Python Library Group: None Status: Closed Resolution: Works For Me Priority: 5 Submitted By: Chris Withers (fresh) Assigned to: Nobody/Anonymous (nobody) Summary: No examples or usage docs for urllib2 Initial Comment: Hi there, I'm sure I reported this before, but it's a couple of major releases later, and there's still no usage docs for urllib2. The examples given are too trivial to be helpful, but I'm guessing people are using the module so there must be some examples out there somewhere ;-) With a bit o fhelp from Moshez, I found the docstring in the module source. At the very least, it'd be handy if that appeared somewhere at: http://docs.python.org/lib/module-urllib2.html But really, mroe extensive and helpful documentation on this cool new module would be very handy. Chris -- Comment By: John J Lee (jjlee) Date: 2006-05-13 19:09 Message: Logged In: YES user_id=261020 Is this helpful, Chris? http://svn.python.org/view/python/trunk/Doc/howto/urllib2.rst?view=markup -- Comment By: Martin v. Löwis (loewis) Date: 2006-05-13 17:33 Message: Logged In: YES user_id=21627 fresh, you haven't responded to jjlee's questions from 2006-04-17 16:26, so it is unclear what precisely it is that you want. In absence of a specific problem description, I'm closing this as works for me. -- Comment By: Chris Withers (fresh) Date: 2006-05-13 16:51 Message: Logged In: YES user_id=24723 wtf? -- Comment By: SourceForge Robot (sf-robot) Date: 2006-05-12 03:21 Message: Logged In: YES user_id=1312539 This Tracker item was closed automatically by the system. It was previously set to a Pending status, and the original submitter did not respond within 14 days (the time period specified by the administrator of this Tracker). -- Comment By: Georg Brandl (gbrandl) Date: 2006-04-27 14:06 Message: Logged In: YES user_id=849994 Chris, I concur with jjlee that suggesting examples is the best way to get something done. Perhaps, if you're using urllib2, you could flesh out some examples from your code? -- Comment By: John J Lee (jjlee) Date: 2006-04-17 15:26 Message: Logged In: YES user_id=261020 Do you have any specific suggestions for what is unhelpful and/or missing? Otherwise, nothing is likely to change. Note that a little was added at the bottom of this page in 2.4, explaining how OpenerDirector uses the handlers to open URLs: http://docs.python.org/lib/opener-director-objects.html Looking at the top-level page, I guess an introduction / overview would help? Did you have other stuff in mind too? -- Comment By: Chris Withers (fresh) Date: 2006-04-17 15:19 Message: Logged In: YES user_id=24723 I still feel there could be more. I guess the best course, for me, would be to leave this open but at a really low priority. However, I probably wouldn't scream too much if the issue was closed. -- Comment By: John J Lee (jjlee) Date: 2006-04-15 19:49 Message: Logged In: YES user_id=261020 They are here: http://docs.python.org/lib/urllib2-examples.html -- Comment By: Chris Withers (fresh) Date: 2006-04-15 19:07 Message: Logged In: YES user_id=24723 Where are these examples you're referring to? I don't see any at: http://docs.python.org/lib/module-urllib2.html I've already commented that the existing ones in the docstring would be a start but still don't really much help in taking full advantage of this module. -- Comment By: John J Lee (jjlee) Date: 2006-04-15 18:34 Message: Logged In: YES user_id=261020 Examples for urllib2 were added some time ago, so I suggest this bug is closed. -- Comment By: Chris Withers (fresh) Date: 2004-06-01 09:17 Message: Logged In: YES user_id=24723 I'm certainly willing, but I am totally incapable :-S The reason I opened this issue is because it would seem that urllib2 is better the urllib, but seems to be severely
[ python-Bugs-1487966 ] SystemError with conditional expression in assignment
Bugs item #1487966, was opened at 2006-05-13 18:25 Message generated for change (Comment added) made by zseil You can respond by visiting: https://sourceforge.net/tracker/?func=detailatid=105470aid=1487966group_id=5470 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Parser/Compiler Group: Python 2.5 Status: Open Resolution: None Priority: 5 Submitted By: iga Seilnacht (zseil) Assigned to: Nobody/Anonymous (nobody) Summary: SystemError with conditional expression in assignment Initial Comment: When a conditional expression appears on the left side of an assignment, SystemError is raised instead of SyntaxError. Example: Python 2.5a2 (trunk:45989M, May 13 2006, 15:40:42) [MSC v.1310 32 bit (Intel)] on win32 a if True else b = 3 SystemError: unexpected expression in assignment 5 (line 1) -- Comment By: iga Seilnacht (zseil) Date: 2006-05-13 22:50 Message: Logged In: YES user_id=1326842 Attaching a patch. Most of the changes in test_syntax are due to error renumbering. All tests passed with this patch applied. -- You can respond by visiting: https://sourceforge.net/tracker/?func=detailatid=105470aid=1487966group_id=5470 ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
