ANN: pyFltk-1.1
This is to announce the first official release of pyFltk-1.1, the Python bindings for the cross platform GUI toolkit fltk-1.1 This release candidate has been tested with fltk-1.1.7 and requires Python2.4. pyFltk is a lighweight, easy-to-use GUI toolkit for Python. It can be used where simplicity, speed, small footprint, and ease-of-use are important. Changes: * Now it is possible to extend all widgets in Python * Fl_Preferences has been added. * Various bug fixes * Faster dispatch (thanks to SWIG) * Improved stability * Added port of FLTK sudoku program A source distribution, a Windows installer, and a Linux binary (including fltk) can be downloaded from http://pyfltk.sourceforge.net. Regards Andreas Held http://pyfltk.sourceforge.net -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
Re: Python vs. Lisp -- please explain
Quoth Steven D'Aprano [EMAIL PROTECTED]: ... | Do you honestly believe that the CPU doesn't have to interpret the machine | code, or are you just deliberately playing silly buggers with language? I don't care whether the CPU has to interpret machine code. Are you suggesting that we might in normal conversation wish to use the term interpreter to mean CPU, like what kind of interpreter does your computer have?, that kind of thing? | Your paragraph above that starts with No of course not, | even omits a point that everyone understands, you can in | fact expect a .py file will work independent of machine | architecture - like any interpreted language. | | Amazing. In your previous post you were telling everybody how the | *disadvantage* of interpreted programs is that they won't run unless the | interpreter is present, and in this post you are telling us that | interpreted languages will just work. What happened to the requirement for | an interpreter? Look, this is my last post on this matter, because you have evidently reached a point where every statement has to be spelled out in excruciating detail to avoid absurd interpretations. will work independent of machine architecture does not declare that it is absolutely guaranteed to work - after all, it may have some other flaw that will prevent it from working anywhere. It just says that if it doesn't work, it isn't because it tried to execute on the wrong machine architecture - the file is machine architecture independent. You know that, you know I know that. What is the fucking problem? | In order to force interpreted language and compiled language into two | distinct categories, rather than just two overlapping extremes of a single | unified category, you have to ignore reality. You ignore interpreted | languages that are compiled, you ignore the reality of how machine code is | used in the CPU, you ignore the existence of emulators, and you ignore | virtual machines. Anyone with an interest in computer programming is likely to know what microcode means, that there are emulators, virtual machines, etc. You might find the UCSD Pascal system interesting, to harken back to the early days of my experience with computers, a fascinating twist on the interpreted/compiled story. Interesting as perspective, but it wouldn't change the way we apply these words to Python. Donn Cave, [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
ANN: yet another python graphviz binding (yapgvb) 1.1.1
Introducing Yapgvb, a Python wrapper around the ATT's graph layout library Graphviz. Features: - A nice clean Pythonic interface - Boost.Python wrapper around the C libraries; no more fiddling with system calls to dot. - Read and write .dot files using Graphviz's own library routines. - Translation to and from Boost.Graph; do your computation using Boost, and draw it with Graphviz. URL: http://yapgvb.sourceforge.net -- http://mail.python.org/mailman/listinfo/python-list
Re: redirecting to a content page
Shreyas wrote:
I am a new user writing some scripts to store data entered via a
browser into a database. I have several content pages, and one
processing page. A content page often has a form like this:
form method=POST action=processing.py
input type=text name=username
...
And the processing page goes like this:
form = cgi.FieldStorage()
## do some work, put data into the db
The thing is, processing.py doesn't have any content that I want to
display to the user.
And this is a GoodThing(tm). A successful post should always be followed
by a redirect.
I would ideally like processing.py to seamlessly
send the user back to the content page that it came from, perhaps with
some parameter tweaks.
import cgi
print Location: %s\n\n % url_of_the_page_you_want_to_redirect_to
(snip)
Please let me know if there's a way to do this, or if my general
approach (having such a processing page) is off.
Nope, having a separate script doing the form processing, then
redirecting is the right thing to do.
- I did try searching for this in the archive but am not even entirely
sure what it is called...
It's a redirection. If you are to work with CGI (or any other web
programming solution FWIW), you'd better know the HTTP protocol.
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
--
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new wooden door step - fixing and finishing
Hi all I'm considering having a go at replacing the wooden door step to our back door. The original is loose and rotting. I'm sure some of this will be clearer when I remove the (metal) door frame - how is such a step fixed? Vertical frame fixings? Also, any suggestions for treating/finishing such an item, subject to heavy use, to prevent future rot? I was wondering about treating it wilth liberal amounts of Teak Oil or similar... Thanks Jon N -- http://mail.python.org/mailman/listinfo/python-list
Re: cPAMIE 2.0 released!!
you forgot the link :) http://pamie.sourceforge.net/ -- http://mail.python.org/mailman/listinfo/python-list
Re: number ranges (was Re: Matlab page on scipy wiki)
Op 2006-02-20, Steven D'Aprano schreef [EMAIL PROTECTED]: John Zenger wrote: I strongly agree that Python should promote range or xrange to syntax. I favor [0..10] rather than [0:10] because 0..10 is inherently easier to understand. Inherently? You mean people are born with an instinctive, unlearnt understanding of ..? Or that our brains are constructed in such a way that .. is easier to understand? For what it is worth, even after years of Python programming, I still sometimes write this: for i in len(myList): # Oops. I too prefer range() or xrange() over magic syntax, but I'm not especially a lover of the range() idiom. How about this? With the introduction of a single keyword, we could do this: for i in 2 to 5: print i, which would print 2 3 4 5 (I'm open to arguments that it should be more Pythonic and less mathematical, and halt at 4.) My suggestion would be to use what we already have and extend that. Python has slices. We could extend slices in two steps. a) Let slices be iterable, so we could have something like: for i in slice(2,5): print i, which would print 2 3 4, Now I agree this wouldn't be a big advantage over the range and xrange function, so the next point b) Allow slice notation in arbitrary places. So we could write the above as: for i in (2:5): print i, A second keyword downto would allow easy backwards loops, and a third step will absolutely kill any chance of Guido agreeing to this whatsoever. Well with iterable slices we wouldn't need any new keyword nor any real new syntax. Just lift the limitation that slice notation is only allowed when indexing. -- Antoon Pardon -- http://mail.python.org/mailman/listinfo/python-list
gmail written in python?
any idea? -- http://mail.python.org/mailman/listinfo/python-list
Re: number ranges
Op 2006-02-21, Tim Hochberg schreef [EMAIL PROTECTED]: [Lots of proposals snipped] 90% of my gripes with range disappeared with the addition of enumerate. However, if there's going to be another round of range literal proposals I might as well throw out what seems (to me anyway) like the only halfway obvious choice in the context of Python. 1. a:b:c is equivalent to slice(a,b,c) with the usual rules that missing values are mapped to None: Parentheses would be required where this construct would otherwise be ambiguous. I think this would be the way to go if want a chance of having it in python 2.x. However I would think that a Bottom and Top value (respectively being smaller and larger than all other objects) would be better suited as default values for python 3000 2. slice(a,b,c) grows an __iter__ method that returns a generator that produces an appropriate sequence of integers. This is easy to define for positive steps, but tricky for negative steps (more on that in a second). Thus: for i in (1::2): print i, = 1 3 5 ... and for i in (:10:3): print i, = 0 3 6 9 The tricky part is deciding what to with negative steps when the start is undefined. It's tempting to use 0 as the start, but I think -1 is actually better if slightly odd. The reason is that I think the following invariant should hold. In python 2.x I would either throw an exception or continuely return None if the start value isn't given. For python 3000 I would continously return Bottom or Top if the start value wasn't given, depending on step being positive or negative. -- Antoon Pardon -- http://mail.python.org/mailman/listinfo/python-list
interpreting the fractional portion of time.clock() vs time.time(0 measurements
let's say i'm taking timing measurements in Windows XPt1 = time.clock() ... t2 = time.clock()t3 = t2 - t1 = say, 0.018 what is the unit of measurement for t3?is it correct to say thatt3 = 18 milliseconds? microsends?what if the timing function used for t1 and t2 was time.time()? is it still correct to say that t3 = 18 milliseconds? i kinda know that in Windows, time.clock() has higher resolution than time.time(), and all i need is millisecond resolution. which of these functions would be easier to translate into millisecond units of measurement? Yahoo! Autos. Looking for a sweet ride? Get pricing, reviews, & more on new and used cars.-- http://mail.python.org/mailman/listinfo/python-list
Re: gmail written in python?
[EMAIL PROTECTED] wrote: any idea? http://panela.blog-city.com/python_at_google_greg_stein__sdforum.htm /F -- http://mail.python.org/mailman/listinfo/python-list
Re: Python vs. Lisp -- please explain
Hallöchen! Peter Mayne [EMAIL PROTECTED] writes: Torsten Bronger wrote: My definiton would be that an interpreted language has in its typical implementation an interpreting layer necessary for typical hardware. Of couse, now we could discuss what is typical, however, in practice one would know it, I think. In case of Python: CPython and all important modern processors. In a previous century, I used something called UCSD Pascal, which at the time was a typical implementation of Pascal. Not a typical implementation but its. [...] And, as someone in this thread has pointed out, it is likely that your important modern (x86) processor is not natively executing your x86 code, and indeed meets your definition of having in its typical implementation an interpreting layer necessary for typical hardware. Only if you deliberately misunderstand me. Another example: is Java the bytecode, which is compiled from Java the language, interpreted or not? Even when the HotSpot JIT cuts in? It is partly interpreted and partly compiled. That's why it's faster than Python. [...] Personally, in practice I don't care, so don't ask me. Ponder on getting angels to dance on the head of a pin before you worry about whether the dance can be interpreted or not. I agree that the term interpreted is bad Python advocacy because its implications are often misunderstood. However, I think that it's fair to make a distiction between compiled and interpreted languages because it may affect one's decision for one or the other. Although I'm surely not ingenious, I can make this distinction. The reason why Python is slower than C is because there is an interpreting layer that C doesn't have. And the reason for this is that Python's nature is incompatible with today's CPUs (which was a deliberate and advantageous design decision). I'm sure that a willing CS person could define this more clearly. Anyway, if we drop scripting and drop interpreted, what do you want to tell people asking why Python is so slow? Because it is dynamic? ;-) Tschö, Torsten. -- Torsten Bronger, aquisgrana, europa vetusICQ 264-296-646 -- http://mail.python.org/mailman/listinfo/python-list
Re: Pyserial never read
Thanks to all for the help, here you find the code, pls note if i use handshaking = 1 the application don't start. in the delphi configuratio of com port if i use or not handshaking the application work. Best Regards at all Luca import serial import win32file port = 2 baudrate = 38400 bytesize =serial.EIGHTBITS parity =serial.PARITY_ODD stopbits =serial.STOPBITS_TWO timeout = 1 ser = serial.Serial(2, baudrate=38400, bytesize=8, parity=serial.PARITY_ODD, stopbits=2, timeout=3) ct = '' ch = '' a = self.textCtrl1.GetValue() ind = 0 ind1 = 2 lunghezza = len(a) while ind lunghezza : b = a[ind:ind1] b = int(b,16) b = ~b c = ''.join([str((b Digit) 1) for Digit in range(7, -1, -1)]) c1 = c[0:4] c2 = c[4:] c1 = c1[3:] + c1[2:3] + c1[1:2] + c1[0:1] c2 = c2[3:] + c2[2:3] + c2[1:2] + c2[0:1] c1 = hex(int(c1,2)) c2 = hex(int(c2,2)) c1 = c1[2:] c2 = c2[2:] c = c2+c1 ct = ct + c ind = ind + 2 ind1 = ind1 + 2 c = int(c,16) c = chr(c) ch = ch + c ser.write(ch) elf.textCtrl2.SetValue(ct) ser.readline() Pls.Note i hove also try with read(number of byte ) with inWaiting(), flush etc But no result. Thanks Luca -- http://mail.python.org/mailman/listinfo/python-list
Re: warning for google api users
Isn't this because the index that the api uses is (a lot) older than the index used by www.google.com? total results are always estimated, so they are not reliable (seen the variance) Gabriel B. schreef: the google webservices (aka google API) is not even close for any kind of real use yet if you search for the same term 10 times, you get 3 mixed totals. 2 mixed result order. and one or two 502 bad gateway i did an extensive match agains the API and the regular search service. the most average set of results: results 1-10; total: 373000 results 11-20; total: 151000 results 21-30; total: 151000 results 31-40; total: 373000 results 41-50; total: 373000 results 51-60; total: 373000 results 61-70; total: 151000 ( 502 bad gateway. retry) results 71-80; total: 373000 results 81-90; total: 151000 ( 502 bad gateway. retry) results 91-100; total: 373000 on the regular google search, total: 2,050,000 (for every page, of course) besides that, the first and third result on the regular google search, does not apear in the 100 results from the API in this query, but this is not average, more like 1 chance in 10 :-/ So, no matter how much google insists that this parrot is sleeping, it's simply dead. now, what i presume that is happening, is that they have a dozen of machine pools, and each one has a broken snapshot of the production index (probably they have some process to import the index and or it explode in some point or they simply kill it after some time). and they obviously don't run that process very often. Now... anyone has some implementation of pygoogle.py that scraps the regular html service instead of using SOAP? :) Gabriel B. -- http://mail.python.org/mailman/listinfo/python-list
cookielib
Hi, I need to get to a particular page in a website. The site uses cookeis and naturally I had to use cookielib since urllib2 does not support cookies. But even after adding the cookies to the headers, I keep getting a error message from the web-site saying that - 'My Browser has disabled cookies and I cannot access the page'. Here is the code I wrote - cookie_obj = cookielib.CookieJar() # First page socket = urllib2.Request(http://www.zap2it.com/index;) cookie_obj.add_cookie_header(socket) data = urllib2.urlopen(socket).read() print data # Second page socket = urllib2.Request(http://tvlistings2.zap2it.com/index.asp?partner_id=nationalmash=mash1zipcode=01810submit1=Continue;) cookie_obj.add_cookie_header(socket) data = urllib2.urlopen(socket).read() print data # Third Page socket = urllib2.Request(http://tvlistings2.zap2it.com/system.asp?partner_id=nationalzipcode=01810;) cookie_obj.add_cookie_header(socket) data = urllib2.urlopen(socket).read() print data Is there anything wrong in the above done code. I printed out the all the HTML headers in each stage to see if the cookie is getting added or not. I found out that the cookies are not getting added. But when I do socket.info().headers I get a list of all the headers wherein I can see 'Set-Cookie' tag and the cookie value. Anyone got any suggestions ? -- http://mail.python.org/mailman/listinfo/python-list
Re: question about scope
John Salerno wrote:
But as far as ifs and loops, is there such a thing as scope in them?
No.
Local scopes are introduced with def or class, nothing
else (or did I forget something?). There is nothing in Python
that corresponds directly to the { } in C and C++. If you want
data to exist in some other scope, put them in a dictionary
(there you have your { } ;^) and use that explicitly.
Each Python module/file is a global scope in Python.
Something to consider if you come from C, is that variables
and assignments in Python are conceptually different from C.
Your objects/values are never created in a local scope. They
are always created on the heap, as if you would use malloc in
C or new in C++. All variables are pointers/references, and
the objects/values are automatically garbage collected. From
a C perspective, the only kind of variables you have are void
pointers, but that's ok, because you can only point these
pointers to managed objects that are handled by the runtime
systems. The runtime system handles both memory allocation
and deallocation and type checks for you. In some particular
cases (e.g. numeric types) it will also perform casting when
you need it.
--
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Re: May i customize basic operator (such as 1==3)?
kanchy kang wrote: many people write test cases with python scripts. in these test scripts, there are many validation statements, for example, in unittest, failUnless(a == b),(a/b may be stringType or intType...) during running test scripts, if there is one exception raised from failUnless, i still do not know a =?, b= ?... i have to add one statment print a or print b again... as i know, there are many validation statements if using python as one test tool... i think my suggestion or requirement may benefit users greatly... you could use the py.test testing framework (http://codespeak.net/py/current/doc/test.html), which tries to print useful information if a test fails. So if your test contains assert a == b and this is False, it will print the values of a and b. For example the test def test_fail(): a = 1 b = 2 assert a == b would result in the following failure: def test_fail(): a = 1 b = 2 E assert a == b assert 1 == 2 This has the drawback that your expressions need to be side-effect free (because they will be re-evaluated) but it is quite useful. Cheers, Carl Friedrich Bolz -- http://mail.python.org/mailman/listinfo/python-list
Re: cookielib
sri2097 [EMAIL PROTECTED] writes: Hi, I need to get to a particular page in a website. The site uses cookeis and naturally I had to use cookielib since urllib2 does not support cookies. It's poorly documented but urllib2 does support cookies now. http://docs.python.org/lib/http-cookie-processor.html -- http://mail.python.org/mailman/listinfo/python-list
Re: May i customize basic operator (such as 1==3)?
Carl Friedrich Bolz wrote: kanchy kang wrote: many people write test cases with python scripts. in these test scripts, there are many validation statements, for example, in unittest, failUnless(a == b),(a/b may be stringType or intType...) during running test scripts, if there is one exception raised from failUnless, i still do not know a =?, b= ?... i have to add one statment print a or print b again... as i know, there are many validation statements if using python as one test tool... i think my suggestion or requirement may benefit users greatly... you could use the py.test testing framework (http://codespeak.net/py/current/doc/test.html), which tries to print useful information if a test fails. The standard unittest module can do this also: replace calls to failUnless(a == b) with failUnlessEqual(a, b). Thomas -- http://mail.python.org/mailman/listinfo/python-list
Re: No
Gaz wrote: Aye, but the file is in MY drive, not the server. Perhaps thats the issue? I bet it's so... how should i deal with it? Perhaps should be a script that uploads the files to the server and then emails it... assuming that the web server can read files on your local disk is perhaps a bit too optimistic. how did you upload your program to the server in the first place ? any reason you cannot use the same approach to upload the image ? /F -- http://mail.python.org/mailman/listinfo/python-list
Re: Determing whether two ranges overlap
Fredrik Lundh wrote:
def overlap(a, b):
return a[1] b[0] and a[0] b[1]
Assuming that x[1] can't be smaller than x[0], this
is the right way to compare two ranges. Well, I guess
you need to figure out the borderline cases. Is it
a[1] b[0] or a[1] = b[0] which is relevant?
Anyway, if we have N ranges and N is big, we'll get
lots of comparisions: N*(N-1)/2.
For large values of N, it might be better to somehow
cache/aggregate the intervals if this makes it possible
to make this into an N*M comparision where M is smaller
than (N-1)/2
E.g, with discrete values for the intervals such as with
(10, 15), one might consider something like (untested):
hits = sets.Set()
for interval in intervals:
for i in range(interval[0], interval[1]+1):
if i in hits:
raise ValueError('%s overlaps previous interval.'
% interval)
hits.add(i)
E.g. if we have 1000 intervals where the average size of
an interval is 10, you get 1 i in hits and hits.add(i)
instead of 499500 'a[1] b[0] and a[0] b[1]'.
As always, it's good to measure...assuming you have fairly
realistic data to test with.
--
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Re: May i customize basic operator (such as 1==3)?
Thomas Heller wrote: The standard unittest module can do this also: replace calls to failUnless(a == b) with failUnlessEqual(a, b). or assertEquals(a, b) -- http://mail.python.org/mailman/listinfo/python-list
Re: Writing my own typing monitor program for RSI sufferers...
[EMAIL PROTECTED] wrote: I want to write a program that will let me know after thirty minutes of typing that I need to take a five minute typing break. But when I stop typing it's smart enough to pause the 30 minute timer automatically. This is under the X-Window System (Linux). The tricky part is obviously knowing when the mouse and keyboard are being usedespecially when my application doesn't have the focus. Obviously I can't do this with just the base python install. Is there an add on library that I can use to monitor the keyboard and mouse? Which is it? Maybe one of the graphical libraries, like wx, or qt, or gtk? Which functions do I need? You can do a bit of X hackery. Look for example at http://www.softlab.ece.ntua.gr/~sivann/src/misc/xkey.c which is a C program that prints keypresses (in any application). Should be fairly easy to turn into a Python extension module to monitor X activity. Cheers, Carl Friedrich Bolz -- http://mail.python.org/mailman/listinfo/python-list
Re: Python vs. Lisp -- please explain
On Wed, 22 Feb 2006 10:15:21 +0100, Torsten Bronger wrote: And, as someone in this thread has pointed out, it is likely that your important modern (x86) processor is not natively executing your x86 code, and indeed meets your definition of having in its typical implementation an interpreting layer necessary for typical hardware. Only if you deliberately misunderstand me. If the words you choose to use have implications which you failed to realise before saying them, don't blame the reader for spotting those implications. Another example: is Java the bytecode, which is compiled from Java the language, interpreted or not? Even when the HotSpot JIT cuts in? It is partly interpreted and partly compiled. That's why it's faster than Python. But Python is partly interpreted and partly compiled too, so that can't be the answer. I think we all know what the answer is. The Python interpreter isn't as fast as the Java interpreter, or most machine code interpreters built into hardware. On the other hand, I'm pretty sure that interpreted Python runs faster on my current PC than compiled code runs on the 20 year old Macintosh in my cupboard. So compiled isn't a magic wand that makes code run faster. [...] Personally, in practice I don't care, so don't ask me. Ponder on getting angels to dance on the head of a pin before you worry about whether the dance can be interpreted or not. I agree that the term interpreted is bad Python advocacy because its implications are often misunderstood. However, I think that it's fair to make a distiction between compiled and interpreted languages because it may affect one's decision for one or the other. Although I'm surely not ingenious, I can make this distinction. Would you rather use a blindingly fast interpreted language, or a slow-as-continental drift compiled one? This isn't a rhetorical question. In the mid-80s, Apple and Texas Instruments collaborated on a Macintosh II computer with a Lisp coprocessor. The problem was, according to benchmarks at the time, Lisp compiled and run natively on the coprocessor was actually slower than Lisp interpreted on a standard Macintosh II. I'm sure that's hardly the only example of a speedy interpreted language beating a glacial compiled one. The reason why Python is slower than C is because there is an interpreting layer that C doesn't have. The primary reason Python is slower than C is because C compilers have been optimized to create fast code, while Python has been created to optimize programmer productivity instead. That means that a simple instruction like x + y does a lot more work in Python than it does in C. There are other languages that, like Python, are dynamic, interpreted, interactive and the rest, and they execute faster than Python. (By the same token, there are also some that execute slower than Python.) Let's be honest here: it isn't that Python can't be as fast as C, it is that the Python Dev team have had other priorities. But over time, as PyPy, Psycho, and other technologies bear fruit, Python will speed up, even though it will remain interpreted. And the reason for this is that Python's nature is incompatible with today's CPUs (which was a deliberate and advantageous design decision). I'm sure that a willing CS person could define this more clearly. Anyway, if we drop scripting and drop interpreted, what do you want to tell people asking why Python is so slow? Because it is dynamic? ;-) Who says Python is so slow? I've just got Python to count from 0 up to 100,000, and it only took 7 milliseconds. That's at least 12 milliseconds faster than I can count on my fingers. But seriously... why not tell them the truth? Python is slower than some other languages because optimization for execution speed has not been the primary focus of Python's development. If you tell them that Python is slow because it is interpreted, they will believe that Python will always be slow. If you tell them that Python is slow because speed has not been the priority, they will believe that some day it will become the priority, and then Python will get faster. And they will be right. That is the aim of PyPy after all. -- Steven. -- http://mail.python.org/mailman/listinfo/python-list
Re: No
On Wed, 22 Feb 2006 11:42:19 +0100, Fredrik Lundh wrote: Gaz wrote: Aye, but the file is in MY drive, not the server. Perhaps thats the issue? I bet it's so... how should i deal with it? Perhaps should be a script that uploads the files to the server and then emails it... assuming that the web server can read files on your local disk is perhaps a bit too optimistic. Come on, Gaz is running Windows. Chances are *everyone* can read files on his local disk. *wink* -- Steven. -- http://mail.python.org/mailman/listinfo/python-list
Path (graph) shower utility
Hi !
I need to create a program that read eml file headers, analyze the
receive tags and create a path database. I finished with this program
section.
But I want to show a graphical summary about the paths.
This is (what I want to show) like a graph - show ways, stations, etc,
and I want to show the strength of lines (how many of mails use this way).
Can anyone known about a freeware tool, software, or python module that
can show graphs with best alignments ?
Please help me. Thanx for it:
dd
Ps:
The OS is Windows XP:
I tryed with pydot, but this code created many 0 length files.
import pydot
print pydot.find_graphviz()
edges=[(1,2), (1,3), (1,4), (3,4)]
g=pydot.graph_from_edges(edges)
g.write_svg('graph_from_edges_dot.svg', prog='dot')
g.write_svg('graph_from_edges_neato.svg', prog='neato')
g.write_jpeg('graph_from_edges_dot.jpg', prog='dot')
g.write_jpeg('graph_from_edges_neato.jpg', prog='neato')
{'fdp': 'c:\\Program Files\\ATT\\Graphviz\\bin\\fdp.exe', 'twopi':
'c:\\Program Files\\ATT\\Graphviz\\bin\\twopi.exe', 'neato':
'c:\\Program Files\\ATT\\Graphviz\\bin\\neato.exe', 'dot': 'c:\\Program
Files\\ATT\\Graphviz\\bin\\dot.exe', 'circo': 'c:\\Program
Files\\ATT\\Graphviz\\bin\\circo.exe'}
Thanx for help: dd
--
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Re: With pyMinGW
[EMAIL PROTECTED] wrote: To use Pyrex, SWIG and the like on a Win2K I have followed this way: http://jove.prohosting.com/iwave/ipython/pyMinGW.html I already had MinGW 3.4.2, so I have decompressed the Python 2.4.2 sources, I have merged in the pyMinGW patch, and I have run the global compilation with: make -f python24.mak all It has compiled most things, but not zlibmodule.c It has stopped the compilation with: c:\..\bin\dllwrap.exe: no export definition file provided. Creating one, but that may not be what you want make[1]: Leaving directory `/.../PyminGW/Python-2.4.2/MinGW' make -f zlib.mak make[1]: Entering directory `/.../PyminGW/Python-2.4.2/MinGW' gcc.exe -c ../Modules/zlibmodule.c -o ../Modules/zlibmodule.o -I../Include -I../Pc -I../../../d ist/zlib-1.2.3 -Wall -s -DNDEBUG -D_USRDLL -O2 ../Modules/zlibmodule.c:8:18: zlib.h: No such file or directory ../Modules/zlibmodule.c:66: error: syntax error before z_stream ... etc etc. Anyway, probably 98% was compiled and this Python works, I have tried the standard tests and most of them pass. Then I have downloaded the pyMinGW Extensions V. 0.0.6.6, so zip and other things now work. The link to the Tcl-Tkinter extension doesn't work (the free site hosting the file doesn't accept this file format anymore), so I cannot use Tkinter. I have decompressed SWIG and put it in a temporary Path. I have then tried a basic SWIG example, (called example) coming from this obsolete but probably still interesting page: http://sebsauvage.net/python/mingw.html But I have had problems durign the module creation: C:\...\PyminGW\Python-2.4.2\MinGWpython setup.py build -cmingw32 running build running build_ext building 'example' extension swigging example.i to example_wrap.c C:\...\PyminGW\swigwin-1.3.28\swig.exe -python -o example_wrap.c example.i creating build creating build\temp.win32-2.4 creating build\temp.win32-2.4\Release C:\..\bin\gcc.exe -mno-cygwin -mdll -O -Wall -Ic:\python24\include -Ic:\pytho n24\PC -c example_wrap.c -o build\temp.win32-2.4\Release\example_wrap.o example_wrap.c: In function `My_variable_set': example_wrap.c:2550: error: `My_variable' undeclared (first use in this function) ... ecc. So I have had 3 problems, maybe some of you can suggest me how to solve some of them. (Can the standard Python site accept to distribuite an installer with MinGW-compiled Python + minGW + SWIG for people using Windows that want such system prebuilt? Maybe me or another person can assemble it). Thank you, bearophile It seems you may be using an old version of pyMinGW, because in the one I have the directory issue of zlib was fixed and the relevant part dealing with include directories in zlib.mak should read now as follows: LIBS = -L. -lpython24 -L../../../dist/zlib-1.2.3 -lz --image-base,0x1e1B INCS = -I../Include -I../Pc -I../../../dist/zlib-1.2.3 CXXINCS = -I../Include -I../Pc -I../../../dist/zlib-1.2.3 The idea is to make INCS point at the location of your zlib sources. As to the Tkinter-Tcl point, then please remember that this was a binary build extension distribution that had nothing to do with the core Python that pyMinGW is supposed to address. And if you download the extension sources then you can certainly build the libraries yourself, and then the python extensions, especially since you have make files ready to use for the later in the pyMinGW sources. The binary distribution was meant to make things a bit easier for people, but since the site stopped the hosting of zip files and since many people do not download that particular file anyway when it was hosted elsewhere, letting the file expire (inactive files are removed after one week from last download), then I hope you'd agree it would be much work for me to keep track of expired and unexpired files and so keep on uploading the files. As to your SWIG problem, then I suggest you look into the pyMinGW's extensions' directory. There you will find two examples of building C and CPP extensions using SWIG and MinGW. Regards, Khalid pyMinGW: http://jove.prohosting.com/iwave/ipython/pyMinGW.html -- http://mail.python.org/mailman/listinfo/python-list
Re: Video Capture modules in linux
ok..i'll check with that...but wait libfg binaries arent available in any software repos..and Diez, I would like to mention that there is a VideoCapture lib exclusively for python..(only that its for win32).. So - that _is_ a C-domain. So can i kinda embed that code into C using the libraries that are available..plz guyz any links would be appreciated Sudharshan S -- http://mail.python.org/mailman/listinfo/python-list
Re: Python vs. Lisp -- please explain
Steven D'Aprano wrote: But over time, as PyPy, Psycho, and other technologies bear fruit, Python will speed up, even though it will remain interpreted. I talked to Richard Emslie recently and he told me that the PyPy team works on a mechanism to create CPython-extension modules written in RPython i.e. a statically translateable subset of Python. So even without dynamic code specialization there will be an optimization path based on the PyPy toolchain that is amazing. Kay -- http://mail.python.org/mailman/listinfo/python-list
Re: embedding python in HTML
John Salerno wrote:
Thanks, that makes much more sense to me now. But does this mean I can
still write HTML normally? What would an example be of having HTML
within a Python script? I have a hard time picturing this, because I
imagine that most of my pages will be almost all HTML, with just a bit
of Python here and there, perhaps to insert headers and footers. Is all
the HTML just wrapped in a big print statement, or something like that?
Imagine for instance, that you have an HTML file where you
want to print a current timestamp when the page is displayed.
A simple way to do this would be to just give your HTML file
another extension (e.g. .tmpl, short for template). Keep the
file as it is, just put the text
%(timestamp)s
in the place(s) where you want your timestamp to appear
in the HTML file.
In your CGI script you can then do something like this:
#!/usr/bin/python -u
import time
print Content-type: text/html\n
text = open('myfile.tmpl).read()
print text % ('timestamp':time.asctime())
The inital Content-type line is important, and it must be
followed by a blank line before the actual content.
Look at the cgitb module too.
Instead of the common Python % interpolation, you could use
string.Template (with a current Python) or one of the many
templating systems around. Since your needs are likely to
grow, you might also want to have a look at one of the many
tool kits for Python and the web. Right now, it seems that
django and turbogears are the most popular. Cherrypy and
web.py are somewhat smaller and simpler systems. Unless you
use one of these tool kits, your homegrown code might turn
into yet another web tool kit eventually, and we have enough
of them already... (Too many I'd say...)
You should also note that traditional CGI scripts are rather
slow with Python, since Python's startup time is significant.
A system where the Python interpreter is already running, as
mod_python embedded in Apache is faster. But by all means, try
it as CGI. It might well be enough for your needs. It's been
ok for me.
--
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Re: Python vs. Lisp -- please explain
Kay Schluehr [EMAIL PROTECTED] writes: I talked to Richard Emslie recently and he told me that the PyPy team works on a mechanism to create CPython-extension modules written in RPython i.e. a statically translateable subset of Python. So even without dynamic code specialization there will be an optimization path based on the PyPy toolchain that is amazing. Sounds great but is that a whole lot different from pyrex? -- http://mail.python.org/mailman/listinfo/python-list
Re: odt - pdf
pyUNO ia a bridge between python and Openoffice.org. Nothing directly to do with export in pdf format. If you prefer you can print a pdf file from a.odt or .doc or .* source with external freeware/shareware or business utilities as pdf creator, adobe acrobat etc. sometimes with more control on results. LB -- http://mail.python.org/mailman/listinfo/python-list
Re: Little tool - but very big size... :-(
BJ in Texas [EMAIL PROTECTED] wrote: [EMAIL PROTECTED] wrote: || 11MB is seldom a concern for today's machine. A good windows/microsoft attitude.. :-) I wish 8-( : PID USER PR NI VIRT RES SHR S %CPU %MEMTIME+ COMMAND 3715 root 15 0 288m 128m 154m S 1.0 6.3 14902:42 XFree86 735 user15 0 156m 84m 40m S 0.3 4.2 3:55.48 firefox-bin 3533 root 16 0 85652 74m 1572 S 0.0 3.7 0:00.22 pcscd 3904 user15 0 67768 49m 17m S 0.3 2.4 4:48.16 gnome-terminal 449 user16 0 58484 41m 39m S 0.0 2.1 16:18.60 kmail 4010 user16 0 49056 34m 22m S 0.0 1.7 0:01.63 kdeinit 31724 user16 0 94708 32m 34m S 0.0 1.6 0:49.03 epiphany 3892 user15 0 41696 22m 19m S 0.0 1.1 0:20.60 nautilus 28992 user15 0 57984 19m 22m S 0.0 1.0 5:53.66 kdeinit 3902 user16 0 26948 18m 11m S 0.0 0.9 1:50.81 xemacs 4237 user15 0 29784 15m 22m S 0.0 0.8 0:01.24 python 444 user16 0 24384 15m 20m S 0.0 0.7 0:08.99 gaim 4026 user15 0 29924 14m 28m S 0.0 0.7 0:12.59 kdeinit 4012 user16 0 27352 14m 25m S 0.0 0.7 0:33.24 kdeinit 5388 user15 0 26008 13m 24m S 0.0 0.7 0:02.06 kdeinit 350 user15 0 20456 12m 17m S 0.0 0.6 0:05.05 gnome-panel -- \S -- [EMAIL PROTECTED] -- http://www.chaos.org.uk/~sion/ ___ | Frankly I have no feelings towards penguins one way or the other \X/ |-- Arthur C. Clarke her nu becomeþ se bera eadward ofdun hlæddre heafdes bæce bump bump bump -- http://mail.python.org/mailman/listinfo/python-list
[OT] Re: number ranges
Steven D'Aprano [EMAIL PROTECTED] wrote: Colin J. Williams [EMAIL PROTECTED] wrote: 1. Why not treat '2 to 5' or '(2 to 5)' as a semi-open interval? I intellectually understand that semi-open intervals are the only way to go. But reading the words, the part of my brain that speaks English cries out for a closed interval. Bad brain. My native British-English speaking brain has never been able to decide whether to indicates a closed or semi-open interval. Whenever I can get away with it, I've adopted the Americanism through (but always retaining that spelling) when describing a closed interval. -- \S -- [EMAIL PROTECTED] -- http://www.chaos.org.uk/~sion/ ___ | Frankly I have no feelings towards penguins one way or the other \X/ |-- Arthur C. Clarke her nu becomeþ se bera eadward ofdun hlæddre heafdes bæce bump bump bump -- http://mail.python.org/mailman/listinfo/python-list
What's happened to Jython?
Jython does not seem to have been updated for more than a year. Any idea whether Jython enhancements are likely to be released in the near future? -- http://mail.python.org/mailman/listinfo/python-list
Re: Python vs. Lisp -- please explain
Paul Rubin wrote: Kay Schluehr [EMAIL PROTECTED] writes: I talked to Richard Emslie recently and he told me that the PyPy team works on a mechanism to create CPython-extension modules written in RPython i.e. a statically translateable subset of Python. So even without dynamic code specialization there will be an optimization path based on the PyPy toolchain that is amazing. Sounds great but is that a whole lot different from pyrex? RPython is Python code not a different language. In a sense RPython consists of a set of rules usual Python has to conform to make complete type-inference feasible. Here is an overview of those rules. http://codespeak.net/pypy/dist/pypy/doc/coding-guide.html#restricted-python Kay -- http://mail.python.org/mailman/listinfo/python-list
Python CGI not working in Firefox but does in IE
I have this Python CGI script running: [CODE] print 'Content-type: text/plain\n' location = 'http://server1.com' page = ''' html head meta http-equiv=Refresh content=0; URL='''+location+''' /head body/body /html''' print page [/CODE] It works fine and redirects perfectly when using Internet Explorer but only shows this in a Firefox window: [OUTPUT] html head meta http-equiv=Refresh content=0; URL=http://server1.com; /head /html [/OUTPUT] Is there anything I can do to fix this? Also, is there a redirect command somewhere within Python CGI that can get this done instead as I would actually prefer to have the CGI code execute this rather than depend on the HTML to do it. Thanks, Harlin Seritt -- http://mail.python.org/mailman/listinfo/python-list
Re: Komodo - Will it Lock Me In?
Matt Trivisonno wrote: Hi Everybody, If I were to use Komodo to write in Python, would it add a lot of goo to my code such that I would not be able to switch to another IDE without having to claw my way out of a tarpit first? Any other thoughts on Komodo? I am considering it because I am hoping to find a solution to the install-packages-until-you-go-blind aspect of Python. Setting up a serious, cross-platform, gui development environment is quite a struggle for a newbie. I work myself currently with the Kommodo IDE (but have not done an thorough evaluation of the market before choosing it). The lock-in question would be solved, if Active State would go open-source with Kommodo. Even a partial open-source would solve this: If the project-management subsystems would go open-source, other IDE's could adopt them, ensuring a cohesive standard across the dynamic communities. - I have made a compact review of Active State, which will possibly give you some relevant information: http://lazaridis.com/samples/com/ActiveState/index.html Note that some things have changed since the review, which could simplify the process of going open source even more: Active State, a Division of Sophos has become ActiveState Software Inc. http://activestate.com/Corporate/Communications/Releases/Press1140209595.html . -- http://lazaridis.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Python vs. Lisp -- please explain
Hallöchen! Steven D'Aprano [EMAIL PROTECTED] writes: On Wed, 22 Feb 2006 10:15:21 +0100, Torsten Bronger wrote: And, as someone in this thread has pointed out, it is likely that your important modern (x86) processor is not natively executing your x86 code, and indeed meets your definition of having in its typical implementation an interpreting layer necessary for typical hardware. Only if you deliberately misunderstand me. If the words you choose to use have implications which you failed to realise before saying them, don't blame the reader for spotting those implications. To me it sounds like Some hardware is harder than other. Another example: is Java the bytecode, which is compiled from Java the language, interpreted or not? Even when the HotSpot JIT cuts in? It is partly interpreted and partly compiled. That's why it's faster than Python. But Python is partly interpreted and partly compiled too It's byte-compiled for a VM, that's not the same, and you know it. Sorry but I think we've exchanged all arguments that are important. Any further comment from me would be redundant, so I leave it. [...] [...] However, I think that it's fair to make a distiction between compiled and interpreted languages because it may affect one's decision for one or the other. [...] Would you rather use a blindingly fast interpreted language, or a slow-as-continental drift compiled one? This isn't a rhetorical question. [example] I'm sure that's hardly the only example of a speedy interpreted language beating a glacial compiled one. I agree that the distinction between interpreted and compiled languages is not as clear as between positiv and negative numbers, however, neither anybody has claimed that so far, nor it is necessary. It must be *practical*, i.e. a useful rule of thumb for decision making. If you really know all implications (pros and cons) of interpreted languages, it's are very useful rule in my opinion. [...] But seriously... why not tell them the truth? Python is slower than some other languages because optimization for execution speed has not been the primary focus of Python's development. If you tell them that Python is slow because it is interpreted, they will believe that Python will always be slow. I don't think that Python's developers don't focus primarily on speed sounds better than Python is interpreted. Both suggests that you must circumvent problems with Python's execution speed (we all know that this works and how) because you can't count on language improvements. Even worse, evading interpreted may sound like an euphemism and as if you want to hide unloved implementation features, depending on your audience. Tschö, Torsten. -- Torsten Bronger, aquisgrana, europa vetusICQ 264-296-646 -- http://mail.python.org/mailman/listinfo/python-list
Re: Python vs. Lisp -- please explain
Hallöchen! Steven D'Aprano [EMAIL PROTECTED] writes: On Wed, 22 Feb 2006 10:15:21 +0100, Torsten Bronger wrote: And, as someone in this thread has pointed out, it is likely that your important modern (x86) processor is not natively executing your x86 code, and indeed meets your definition of having in its typical implementation an interpreting layer necessary for typical hardware. Only if you deliberately misunderstand me. If the words you choose to use have implications which you failed to realise before saying them, don't blame the reader for spotting those implications. To me it sounds like Some hardware is harder than other. Another example: is Java the bytecode, which is compiled from Java the language, interpreted or not? Even when the HotSpot JIT cuts in? It is partly interpreted and partly compiled. That's why it's faster than Python. But Python is partly interpreted and partly compiled too It's byte-compiled for a VM, that's not the same, and you know it. Sorry but I think we've exchanged all arguments that are important. Any further comment from me would be redundant, so I leave it. [...] [...] However, I think that it's fair to make a distiction between compiled and interpreted languages because it may affect one's decision for one or the other. [...] Would you rather use a blindingly fast interpreted language, or a slow-as-continental drift compiled one? This isn't a rhetorical question. [example] I'm sure that's hardly the only example of a speedy interpreted language beating a glacial compiled one. I agree that the distinction between interpreted and compiled languages is not as clear as between positiv and negative numbers, however, neither anybody has claimed that so far, nor it is necessary. It must be *practical*, i.e. a useful rule of thumb for decision making. If you really know all implications (pros and cons) of interpreted languages, it's are very useful rule in my opinion. [...] But seriously... why not tell them the truth? Python is slower than some other languages because optimization for execution speed has not been the primary focus of Python's development. If you tell them that Python is slow because it is interpreted, they will believe that Python will always be slow. I don't think that Python's developers don't focus primarily on speed sounds better than Python is interpreted. Both suggests that you must circumvent problems with Python's execution speed (we all know that this works and how) because you can't count on language improvements. Even worse, evading interpreted may sound like an euphemism and as if you want to hide unloved implementation features, depending on your audience. Tschö, Torsten. -- Torsten Bronger, aquisgrana, europa vetusICQ 264-296-646 -- http://mail.python.org/mailman/listinfo/python-list
Re: Python CGI not working in Firefox but does in IE
Harlin Seritt [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] [CODE] print 'Content-type: text/plain\n' That's your problem. You've said text/plain when you meant text/html. -- http://mail.python.org/mailman/listinfo/python-list
Re: why does close() fail miserably on popen with exit code -1 ?!
Atanas Banov wrote: Jeffrey Schwab wrote: _PyPclose returns the exit status of the popened process (the popenee?), or -1 on error. Of course, if the status is supposed to be -1, there's some confusion. yes, that's what i thought the root of the problem is. In the snippet of code below (from Modules/posixmodule.c), result has been initialized to the output of fclose, which in your case is 0. The comment is particularly handy. /* Indicate failure - this will cause the file object * to raise an I/O error and translate the last * error code from errno. We do have a problem with * last errors that overlap the normal errno table, * but that's a consistent problem with the file object. */ the piece you quoted is from the unix #ifdef part, i think. there is another version of the pypclose for windows below that. in any event i think such behaviour is a bug - just because in unix exit codes are limited to 0..255 (and returned multiplied by 256) doesnt mean other OSes should suffer because of design flow in _PyPclose, right? throwing an IOError no error doesnt help. is there a bug database for python where i can check if this was discussed? Yes, there's a bug database linked from python.org; search the main page for Bugs. Here's the most (seemingly) relevant bug report I can find: http://sourceforge.net/tracker/index.php?func=detailaid=602245group_id=5470atid=105470 -- http://mail.python.org/mailman/listinfo/python-list
Re: Python CGI not working in Firefox but does in IE
Harlin Seritt wrote: I have this Python CGI script running: [CODE] print 'Content-type: text/plain\n' location = 'http://server1.com' page = ''' html head meta http-equiv=Refresh content=0; URL='''+location+''' /head body/body /html''' print page [/CODE] It works fine and redirects perfectly when using Internet Explorer but only shows this in a Firefox window: [OUTPUT] html head meta http-equiv=Refresh content=0; URL=http://server1.com; /head /html [/OUTPUT] Is there anything I can do to fix this? Also, is there a redirect command somewhere within Python CGI that can get this done instead as I would actually prefer to have the CGI code execute this rather than depend on the HTML to do it. Thanks, Harlin Seritt this snippet works (from code I wrote to implement a shoutbox): print '''html head meta http-equiv=refresh content=0;URL='''+HOME+''' / /head body pPlease wait.../p /body /html''' I assume your version doesn't work because of the uppercase 'R'. Iain -- http://mail.python.org/mailman/listinfo/python-list
Re: Python CGI not working in Firefox but does in IE
Ack... I'm an idiot... Thanks Richard -- You're the Man! -- http://mail.python.org/mailman/listinfo/python-list
Re: Which is faster? (if not b in m) or (if m.count(b) 0)
Thank you, Peter! Please understand, I was attempting to get more info on the WHY x is faster than y... from those with more experience. Timer cannot give me that info. -- http://mail.python.org/mailman/listinfo/python-list
Re: interpreting the fractional portion of time.clock() vs time.time(0 measurements
john peter wrote: let's say i'm taking timing measurements in Windows XP t1 = time.clock() ... t2 = time.clock() t3 = t2 - t1 = say, 0.018 what is the unit of measurement for t3? is it correct to say that t3 = 18 milliseconds? microsends? what if the timing function used for t1 and t2 was time.time()? is it still correct to say that t3 = 18 milliseconds? i kinda know that in Windows, time.clock() has higher resolution than time.time(), and all i need is millisecond resolution. which of these functions would be easier to translate into millisecond units of measurement? This looks like a repost of a previous question, to which I already posted an answer. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python vs. Lisp -- please explain
Kay Schluehr wrote: Paul Rubin wrote: Kay Schluehr [EMAIL PROTECTED] writes: I talked to Richard Emslie recently and he told me that the PyPy team works on a mechanism to create CPython-extension modules written in RPython i.e. a statically translateable subset of Python. Sounds great but is that a whole lot different from pyrex? I've wondered that as well. RPython is Python code not a different language. In a sense RPython consists of a set of rules usual Python has to conform to make complete type-inference feasible. Here is an overview of those rules. http://codespeak.net/pypy/dist/pypy/doc/coding-guide.html#restricted-python But does that make it proper Python? Having, for example, only one type associated with a name (they use the term variable, though) at any given time makes it more like various statically typed or functional languages, although I can fully understand why you'd want this restriction. Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: That's really high-level: bits of beautiful python
Max wrote: I have a friend who has been programming in C for many years, and he is a great fan of the language. However, he (and I) are about to start a python course, and he has been asking me a lot of questions. He often responds to my answers with Urgh! Object-orientation! and suchlike. After many years of C programming, he's still wary of object orientation? But today we were discussing the problem of running externally-provided code (e.g. add-on modules). Neither of us knew how to do it in C, though I suggested using DLLs. It depends on how the module was provided, and on the platform and tool chain being used to build the code. It's typically not too hard on a given platform, once you get used to it, but there's certainly no single correct answer. However, I quickly installed python on his laptop and coded this: exec import %s as ext_mod % raw_input(Module: ) ext_mod.do() exec'ing raw_input'd code gives me the willies. And created to sample modules with do() functions to demonstrate. He was impressed (That's really high-level were his words). It is cool, isn't it? :) I was just thinking perhaps we should create some kind of collection of bits of impressive code like this. Do you mean something like the ASPN Cookbooks? http://aspn.activestate.com/ASPN/Cookbook/ If you keep track of some examples of cool stuff, I'll format them and get some web space to post them. Try to give credit for each example. He also liked 99 Bottles in one line: print '\n'.join([%d bottles of beer on the wall. % i for i in range(100,0,-1)]) A little shorter: for i in range(99, 0, -1): print(%d bottles of beer on the wall. % i) -- http://mail.python.org/mailman/listinfo/python-list
Re: Pyserial never read
On 2006-02-22, Nick Craig-Wood [EMAIL PROTECTED] wrote: Anything's possible, but given that in his original post he says it works when he uses Delphi, it seems unlikely making a change to the hardware is necessary. Sorry missed that bit! Pyserial works very well in my experience (under linux). I've used it extensively under both Linux and Win32, and it works very well under both. Serial ports are generally a pain though ;-) That's the truth. -- Grant Edwards grante Yow! Somewhere in Tenafly, at New Jersey, a chiropractor visi.comis viewing Leave it to Beaver! -- http://mail.python.org/mailman/listinfo/python-list
Re: Python vs. Lisp -- please explain
Paul Rubin wrote: Kay Schluehr [EMAIL PROTECTED] writes: I talked to Richard Emslie recently and he told me that the PyPy team works on a mechanism to create CPython-extension modules written in RPython i.e. a statically translateable subset of Python. So even without dynamic code specialization there will be an optimization path based on the PyPy toolchain that is amazing. Well. ... the PyPy team works on ... is definitively much too strong. It is more like ... the PyPy team is thinking about It is very unclear whether it will work on a technical level and whether the EU will allow us to allocate resources accordingly. Sounds great but is that a whole lot different from pyrex? Indeed, there are similarities to pyrex. Of course in pyrex you have to give the types yourself, but since the type inference engine of PyPy can sometimes be hard to understand this is maybe not the worst trade-off. A nice advantage of the PyPy approach would be that you can test your RPython code by running it on top of CPython until it works and only then translating it into C. Plus it would be possible to use the same extension module for PyPy, CPython and potentially even Stackless or Jython (if somebody writes a Java backend). But as I said, this is all pretty unclear at the moment (and getting really quite off-topic for this thread). Cheers, Carl Friedrich -- http://mail.python.org/mailman/listinfo/python-list
Question about struct.unpack
Hi,
To experiment with unpacking, i've written a little C code which
stores one record in a file. Then, i try to reread this file to unpack
the record.
Here's the struct of a record:
typedef struct {
char nom[30];
double taille;
int age;
char plop;
} enreg_t;
The whole size, as given by sizeof() is 48, due to byte alignment.
I was first thinking that 32sdic would make the job, but calcsize()
reports only 45 for this format. So, without knowing what, i've tried
32sdicxxx to reach the 48 expected... Now it works...
The same file, re-read with a Ruby script needs a
str.unpack(Z32dIc).
So, i don't know why i need to pad the format string in Python. Any
clue?
BTW: how to get rid of all this stuff after the \0 in the first field
in Python? (Ruby has Z and A, but it seems that the Python 's'
specifier is like 'A' and there is no 'Z' equivalent)
--
Eric Jacoboni, ne il y a 1444057108 secondes
--
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Re: Python CGI not working in Firefox but does in IE
Harlin Seritt wrote: Also, is there a redirect command somewhere within Python CGI that can get this done instead as I would actually prefer to have the CGI code execute this rather than depend on the HTML to do it. http://groups.google.com/group/comp.lang.python/msg/6e929fab0d414b2c shows how do do a redirect with HTTP headers. Kent -- http://mail.python.org/mailman/listinfo/python-list
Re: With pyMinGW
Thank you for your answers, Khalid. It seems you may be using an old version of pyMinGW, I have downloaded it yesterday from your site. the relevant part dealing with include directories in zlib.mak should read now as follows: I have checked, and that relevant part is the same in my zlib.mak. but since the site stopped the hosting of zip files and since many people do not download that particular file anyway when it was hosted elsewhere, letting the file expire (inactive files are removed after one week from last download), then I hope you'd agree it would be much work for me to keep track of expired and unexpired files and so keep on uploading the files. You can probably remove the dead link from your page. (Maybe I can build a complete package (with Tkinter, minGW and Swig too), and put it in some official Python site.) As to your SWIG problem, then I suggest you look into the pyMinGW's extensions' directory. There you will find two examples of building C and CPP extensions using SWIG and MinGW. I don't want to use/waste too much of your time, I have succed with the C++ example, but the C example has given me some problems: C:\...\PyminGW\Python-2.4.2\MinGW\Extensions\pyExt_C_exmaplepython24 setupMingW.py build --compile r=mingw32 running build running build_ext building '_example' extension swigging example.i to example_wrap.c C:\...\PyminGW\swigwin-1.3.28\swig.exe -python -o example_wrap.c example.i C:\..\bin\gcc.exe -mno-cygwin -mdll -O2 -Wall -s -IC:\...\PyminGW\Python-2.4 .2\include -IC:\...\PyminGW\Python-2.4.2\PC -c example_wrap.c -o build\temp.win32-2.4\Release\examp le_wrap.o example_wrap.c: In function `PySwigClientData_New': example_wrap.c:1205: warning: dereferencing type-punned pointer will break strict-aliasing rules example_wrap.c: In function `PySwigObject_own': example_wrap.c:1456: warning: dereferencing type-punned pointer will break strict-aliasing rules example_wrap.c:1456: warning: dereferencing type-punned pointer will break strict-aliasing rules example_wrap.c: In function `My_variable_set': example_wrap.c:2515: error: `My_variable' undeclared (first use in this function) Bye, bearophile -- http://mail.python.org/mailman/listinfo/python-list
Re: cookielib
sri2097: urllib2 does not support cookies. It does in 2.4. This code enables cookie support in all consequent calls through urrlib2: import cookielib, urllib2 opener = urllib2.build_opener(urllib2.HTTPCookieProcessor()) urllib2.install_opener(opener) -- René Pijlman -- http://mail.python.org/mailman/listinfo/python-list
Re: Python vs. Lisp -- please explain
Carl Friedrich Bolz: Indeed, there are similarities to pyrex. Of course in pyrex you have to give the types yourself, but since the type inference engine of PyPy can sometimes be hard to understand this is maybe not the worst trade-off. A nice advantage of the PyPy approach would be that you can test your RPython code by running it on top of CPython until it works and only then translating it into C. [...] But as I said, this is all pretty unclear at the moment Maybe PyPy can be used to allow a better linking between interpreted Python code and code compiled by ShedSkin. SS contains a good type inferencer that maybe can be useful to compile RPython too, aren't PyPy people interested in SS and its capabilities? Bye, bearophile -- http://mail.python.org/mailman/listinfo/python-list
Re: That's really high-level: bits of beautiful python
Jeffrey Schwab wrote: Max wrote: I was just thinking perhaps we should create some kind of collection of bits of impressive code like this. Do you mean something like the ASPN Cookbooks? http://aspn.activestate.com/ASPN/Cookbook/ repositories, indexes and search engines for py code (pardon the small number ;-} http://www.vex.net/parnassus/ http://directory.google.com/Top/Computers/Programming/Languages/Python/Modules/ http://cheeseshop.python.org/ http://dmoz.org/Computers/Programming/Languages/Python/Modules/ http://aspn.activestate.com/ASPN/Cookbook/Python http://python.codezoo.com/ http://sourceforge.net/softwaremap/trove_list.php?form_cat=178xdiscrim=178 http://www.bigbold.com/snippets/ http://www.voidspace.org.uk/cgi-bin/pysearch/search.py http://koders.com/ http://krugle.com/ http://www.codefetch.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: No
@ Steven: LOL =P @ Frederik: aye, i uploaded the script by FTP, but the idea of this little program is to allow a technician on field to upload photos from their laptops when they get into a hotel, along with some text, anywere in the world. We need the reports to be daily. Email is not an option, because due my experience, they always lack of info, with a form, i can put some conditions for sending the report. So, they can not upload the photos by FTP because its too geek for them. And i need to have a standarized form to handle the reports, because otherwise its a organizational mess. The program should handle the upload thingie in the backstage. I'll look for a script like this in these forums... -- http://mail.python.org/mailman/listinfo/python-list
bunding options
I work at home on Linux desktops, but would like to bundle a Python/wxPython application for Windows desktops, Linux desktops, etc. I am currently using py2exe to distribute a zipfile that is then usable by anyone on win32. On Linux, a source tarball is available, and the users can sync up with the various versions of tools that I used (python, wxpython, sqlite, pysqlite, etc) to run the code, but considering that Python moves so fast and drops backwards compatibility so fast, what is available on the Linux desktops is not recent enough. I would like to be able to compile a Linux version for distribution as well, perhaps a Mac OSX version too. If I used Java I could distribute an executable jar file and require the JRE = someversion to be installed, and my work would be done. What options do I have with Python? Can I take an existing app and generate C code with freeze.py, and build it? I'm having a hard time arguing against Java with my coworkers due some of these distribution issues. py2exe saved me on Windows, although it does require a win32 build host, and I work on Linux. Suggestions appreciated. Thanks, Mike -- http://mail.python.org/mailman/listinfo/python-list
Re: What's happened to Jython?
According to http://sourceforge.net/project/showfiles.php?group_id=12867 The last release of 2.2a was on July 17, 2005 - about 7 months. -- http://mail.python.org/mailman/listinfo/python-list
Re: Basic coin flipper program - logical error help
wes weston wrote: DannyB wrote: I'm just learning Python. I've created a simple coin flipper program - ... Dan, Looping is easier with: for x in range(100): if random.randint(0,1) == 0: heads += 1 else: tails += 1 Or, continuing with that theme: for x in range(N): heads += random.randint(0, 1) As in: import random N = 100 heads = 0 for x in range(N): heads += random.randint(0, 1) print %d heads and %d tails. % (heads, N - heads) -- http://mail.python.org/mailman/listinfo/python-list
can't use NetcdfFile
Hi, I'm trying to open a Netcdf file using NetcdfFile but I always get an import error DLL failed even though I've tried using all these: import Numeric from Scientific.IO.NetCDF import NetCDFFile from Scientific.IO import NetCDF from Scientific import * from Scientific.IO.NetCDF import * I've got Scientific,Numeric and numpy installed I'd appreciate anyone's help Thanks Vishal. -- http://mail.python.org/mailman/listinfo/python-list
Re: a little more help with python server-side scripting
Steve Holden wrote: Note that purists might suggest this isn't the best way to use Python on the web. If it gets you where you want to be, feel free to ignore them :-) Thanks for the info. Basically I don't plan to do big stuff with Python on the internet (at least not right now while I'm still learning the language). I already know how to use a PHP include, so I could just keep doing that, but I figure since I'm learning Python, I might as well start using it wherever I can, assuming that it is okay to use it this way. -- http://mail.python.org/mailman/listinfo/python-list
Re: What are COM-enabled applications?
In article [EMAIL PROTECTED], Tempo [EMAIL PROTECTED] wrote: As the subject of this post suggests, I have one question; what are COM-enabled applications? I believe Microsoft Word is one of these apps, but what else? Is a web browser, Paint, Solitare, games, etc? I'm not sure if it varies from operating system to operating system, but I am talking about COM applications in Windows. Thanks for any and all of your help and time. As Mr. Teja has already written in response, COM is a big, and in some ways dated, subject. To answer your specific questions: yes, most Web browsers I know for Windows *are* COM-enabled, Solitaire typically isn't, and I'm not near a Win* machine now to confirm that Paint is. Python has good COM abilities. While, to my surprise, I just realized that I'm unaware of anyone having put together a COM explorer with Python, it would be a straightforward project. In the meantime, URL: http://aspn.activestate.com/ASPN/docs/ActivePython/2.3/PyWin32/html/com/win32com/HTML/QuickStartClientCom.html#UsingComConstants might interest you. -- http://mail.python.org/mailman/listinfo/python-list
Re: Basic coin flipper program - logical error help
DannyB said unto the world upon 21/02/06 06:14 PM: I'm just learning Python. I've created a simple coin flipper program - here is the code: [source] #Coin flipper import random heads = 0 tails = 0 counter = 0 coin = random.randrange(2) while (counter 100): if (coin == 0): heads += 1 counter += 1 else: tails += 1 counter += 1 coin = random.randrange(2) snip The program runs - however - it will give me 100 heads OR 100 tails. Can someone spot the logic error? snip Your original question is long since answered. But I've a style point. As Dennis Lee Bieber pointed out, you don't need all three accumulators. If you keep to the overall style of your code, you can avoid repeating yourself as: while (counter 100): counter += 1 # No point in putting this in each branch coin = random.randrange(2) if (coin == 0): heads += 1 else: tails += 1 For roughly the same style, I'd go with: heads = 0 count = 100 for i in range(count): if random.randrange(2): heads += 1 tails = count - heads HTH, Brian vdB -- http://mail.python.org/mailman/listinfo/python-list
Re: No
Gaz wrote: Aye, but the file is in MY drive, not the server. Perhaps thats the issue? I bet it's so... how should i deal with it? Perhaps should be a script that uploads the files to the server and then emails it... i believed this was handled using the root in my PC, but now i see this is not correct. Now i need a script for uploading the files from MY pc and then use the sendmail thingie. Any tips about that script? google 'python cgi file upload' for many examples. Kent -- http://mail.python.org/mailman/listinfo/python-list
Re: Python vs. Lisp -- please explain
I replied to this message yesterday, but it did not appear, so let's try again. I agree with your points, but I would not say that Lisp is intrinsically more dynamic than Python as a language; it is just more interactive and has more features (and more complexities too). BTW, regarding your first point on interactive sessions, are you aware of Michael Hudson's recipe automatically upgrade class instances on reload() http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/160164 ? Michele Simionato -- http://mail.python.org/mailman/listinfo/python-list
Re: Python vs. Lisp -- please explain
Steven D'Aprano wrote: Who says Python is so slow? I've just got Python to count from 0 up to 100,000, and it only took 7 milliseconds. That's at least 12 milliseconds faster than I can count on my fingers. +1 QOTW -- http://mail.python.org/mailman/listinfo/python-list
PyUNO with different Python
Hi! maybe somebody can give me an hint to my problem setting up PyUNO on my Mac to work with my Python not the Python delivered with OpenOffice. As said in installation instructions I've set OPENOFFICE_PATH=/usr/lib/openoffice/program export PYTHONPATH=$OPENOFFICE_PATH export LD_LIBRARY_PATH=$OPENOFFICE_PATH according to my environment. importing uno gives me this error: import uno Traceback (most recent call last): File stdin, line 1, in ? File /Applications/OpenOffice.org 2.0.app/Contents/openoffice.org2.0/program/uno.py, line 37, in ? import pyuno ImportError: No module named pyuno which means python finds uno but not pyuno (pyuno.dylib). Any hints? Regards, Katja -- http://mail.python.org/mailman/listinfo/python-list
Re: No
Gaz [EMAIL PROTECTED] wrote: So, they can not upload the photos by FTP because its too geek for them. And i need to have a standarized form to handle the reports, because otherwise its a organizational mess. Am I missing something here, or is all you need a INPUT TYPE=FILE ... on your form? Then you don't worry about filenames, you just get their data supplied to your cgi script. -- \S -- [EMAIL PROTECTED] -- http://www.chaos.org.uk/~sion/ ___ | Frankly I have no feelings towards penguins one way or the other \X/ |-- Arthur C. Clarke her nu becomeþ se bera eadward ofdun hlæddre heafdes bæce bump bump bump -- http://mail.python.org/mailman/listinfo/python-list
Re: define loop statement?
David Isaac wrote: PS Here's the motivation. Python closely resembles pseudocode. With a very little LaTeX hacking, it is often possible to write algorithms is Python that typeset as reasonable pseudocode. A simple repetitive loop is a bit of a sticking point. With slightly more LaTeX hacking or possibly Python hacking on your script before passing it to LaTeX, you might just be able to change occurences of for x in range(a, b): to for x in [a, b): or whatever, and get away with plain vanilla Python in your code... -- http://mail.python.org/mailman/listinfo/python-list
Re: Basic coin flipper program - logical error help
Paul McGuire [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] sort, then groupby. import itertools import random h,t = [len(list(g)) for k,g in itertools.groupby(sorted([random.randrange(2) for i in xrange(100)]))] print h,t By the way, sort + groupby generalizes beyond just coin-flipping. Here is a modified version that simulates die rolls. -- Paul import itertools import random NUM_ROLLS = 1000 dieRolls = [random.randrange(6)+random.randrange(6)+2 for i in xrange(NUM_ROLLS)] # create dummy list entries for impossible rolls of 0 and 1 rolls = [None,None] rolls += [len(list(g)) for k,g in itertools.groupby(sorted(dieRolls))] # print out nice histogram for i,r in enumerate(rolls): if i 1: print %2d - %s % (i,**int(round(r/10.0))) prints: 2 - *** 3 - * 4 - * 5 - ** 6 - *** 7 - ** 8 - ** 9 - * 10 - *** 11 - *** 12 - *** -- http://mail.python.org/mailman/listinfo/python-list
Re: a little more help with python server-side scripting
John Salerno wrote: I contacted my domain host about how Python is implemented on their server, and got this response: Uh, okay, I asked a related question to them and now I got this: Hello John, There are some corrections based on last reply. The python installation on our windows hosting is not configured as mod_python. Howevet, it is directly map with a website extensions mapping in IIS. Save your python script as .py file on the wwwroot and you may call the scripts using http://www.yourdomain.com/yourfile.py If you have any enquiries, please do not hesitate to contact. Best regards, Mackenzie S. Support Executive --- Does that really change anything? What I had asked was if I could just embed Python code within my HTML files, like you do with PHP, but they didn't address that yet. -- http://mail.python.org/mailman/listinfo/python-list
Re: a little more help with python server-side scripting
John Salerno enlightened us with: What I had asked was if I could just embed Python code within my HTML files, like you do with PHP, but they didn't address that yet. Check out PSP. Sybren -- The problem with the world is stupidity. Not saying there should be a capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself? Frank Zappa -- http://mail.python.org/mailman/listinfo/python-list
except clause not catching IndexError
I'm sorry if this is a FAQ or on an easily-accesible RTFM style page, but i couldnt find it. I have some code like this: for line in f: toks = line.split() try: if int(toks[2],16) == qaddrs[i]+0x1000 and toks[0] == 200: #producer write prod = int(toks[3], 16) elif int(toks[2],16) == qaddrs[i]+0x1002 and toks[0] == 200: #consumer write cons = int(toks[3], 16) else: continue except IndexError: #happens if theres a partial line at the end of file print indexerror break However, when I run it, it seems that I'm not catching the IndexError: Traceback (most recent call last): File /home/dschuff/bin/speeds.py, line 202, in ? if int(toks[2],16) == qaddrs[i]+0x1000 and toks[0] == 200: #producer write IndexError: list index out of range If i change the except IndexError to except Exception, it will catch it (but i believe it's still an IndexError). this is python 2.3 on Debian sarge. any ideas? thanks, -derek -- http://mail.python.org/mailman/listinfo/python-list
Re: can't use NetcdfFile
[EMAIL PROTECTED] wrote: Hi, I'm trying to open a Netcdf file using NetcdfFile but I always get an import error DLL failed even though I've tried using all these: import Numeric from Scientific.IO.NetCDF import NetCDFFile from Scientific.IO import NetCDF from Scientific import * from Scientific.IO.NetCDF import * Copy Pasting the exact error message helps tremendously. I've got Scientific,Numeric and numpy installed Are you sure you have them installed successfully? How did you install them? (Precompiled or from source, and if so, with which compiler?) IIRC, Scientific doesn't come with the NetCDF, you have to install the NetCDF library separately. (See http://www.unidata.ucar.edu/software/netcdf/ for download.) After installing the NetCDF library, you might need to reinstall Scientific to get it to recognize the NetCDF install. You might also want to check out http://dirac.cnrs-orleans.fr/mmtk_wiki/WindowsInstallation - strictly speaking, it's installation instructions for MMTK, but you can ignore the final steps of installing MMTK, if you want. If you need further help, you can always try a more specific resource, like the MMTK mailing list - http://starship.python.net/mailman/listinfo/mmtk (MMTK is written by the same person (Konrad Hinsen) as Scientific, and depends on Scientific.) -- http://mail.python.org/mailman/listinfo/python-list
Tkinter canvas size determination
I need to determine the size of a canvas while the process is running. Does anyone know of a technique that will let me do that? Thanks, Dean -- http://mail.python.org/mailman/listinfo/python-list
Re: getting the line just before or after a pattern searched
[EMAIL PROTECTED] wrote:
hi
i have a file something like this
abcdefgh
ijklmnopq
12345678
rstuvwxyz
.
.
.
12345678
.
whenever i search the file and reach 12345678, how do i get the line
just above and below ( or more than 1 line above/below) the pattern
12345678 and save to variables? thanks
For gigantic files (i.e. can't put all in RAM at once)
just make sure you always remember the previously read line.
Something like this:
old = None
f = open('mybigfile.txt')
for line in f:
if line == '12345678\n':
print old,
print line,
print f.next(),
old=line
--
http://mail.python.org/mailman/listinfo/python-list
Re: Pyserial never read
Well, I think it is better to start with some simple code first. Try to read serial port and print it out. something like this could work: import serial s = serial.Serial(port=2,baudrate=38400, timeout=20) while 1: print s.readline() Petr Jakes -- http://mail.python.org/mailman/listinfo/python-list
cx_Oracle and UTF8
Hello, I am looking for a method to convince cx_Oracle and oracle to encode it's replies in UTF8. For the moment I have to... cn=cx_Oracle.connect(user,password, database) cs=cn.Cursor() cs.execute(select column1, column2, column3 from table) for row in cs.fetchall(): t=[] for i in range(0,len(row)): if hasattr(row[i],encode): t.append(row[i].encode(utf8)) else: t.append(row[i]) print t Guess I am to much accustomed to postgresql which just allows set client_encoding='utf8'... Harald -- http://mail.python.org/mailman/listinfo/python-list
Re: except clause not catching IndexError
Derek Schuff [EMAIL PROTECTED] writes: I have some code like this: [...] except IndexError: #happens if theres a partial line at the end of file print indexerror break However, when I run it, it seems that I'm not catching the IndexError: Traceback (most recent call last): File /home/dschuff/bin/speeds.py, line 202, in ? if int(toks[2],16) == qaddrs[i]+0x1000 and toks[0] == 200: #producer write IndexError: list index out of range Did you by any chance do something like: except ValueError, IndexError: at some point earlier in this function? That, when catching ValueError assigns the resulting exception to IndexError (and so the following except IndexError: wouldn't work as IndexError is no longer what you think it is). The correct syntax for catching multiple exceptions is: except (ValueError, IndexError), targetVariable: You could verify this by doing a print repr(IndexError) before your line 202, to see that it really is the IndexError builtin. -- === [EMAIL PROTECTED]London, E14 URL:http://www.andreasen.org/ * === -- http://mail.python.org/mailman/listinfo/python-list
Re: Question about struct.unpack
Eric Jacoboni wrote:
Hi,
To experiment with unpacking, i've written a little C code which
stores one record in a file. Then, i try to reread this file to unpack
the record.
Here's the struct of a record:
typedef struct {
char nom[30];
double taille;
int age;
char plop;
} enreg_t;
The whole size, as given by sizeof() is 48, due to byte alignment.
...i've tried 32sdicxxx to reach the 48 expected... Now it works...
The same file, re-read with a Ruby script needs a
str.unpack(Z32dIc).
So, i don't know why i need to pad the format string in Python. Any
clue?
BTW: how to get rid of all this stuff after the \0 in the first field
in Python? (Ruby has Z and A, but it seems that the Python 's'
specifier is like 'A' and there is no 'Z' equivalent)
OK, the correct translation of your format is: '30sdic' (size 45) or
'30sdic3x' if you are passing the entire 48-char block. The reason
it is not size 48 is that '30sdicc' (size 46) in C takes no more room.
the alignment to the end shows up in a C sizeof.
data = struct.pack('30sdic', 'John Q. Public', 57123.25, 43, 'M')
nomz, taille, age, plop = struct.unpack('30sdic', data)
nom = nomz.rstrip('\0')
--Scott David Daniels
[EMAIL PROTECTED]
--
http://mail.python.org/mailman/listinfo/python-list
Re: except clause not catching IndexError
Derek Schuff wrote: I have some code like this: for line in f: toks = line.split() try: if int(toks[2],16) == qaddrs[i]+0x1000 and toks[0] == 200: #producer write prod = int(toks[3], 16) elif int(toks[2],16) == qaddrs[i]+0x1002 and toks[0] == 200: #consumer write cons = int(toks[3], 16) else: continue except IndexError: #happens if theres a partial line at the end of file print indexerror break However, when I run it, it seems that I'm not catching the IndexError: Traceback (most recent call last): File /home/dschuff/bin/speeds.py, line 202, in ? if int(toks[2],16) == qaddrs[i]+0x1000 and toks[0] == 200: #producer write IndexError: list index out of range If i change the except IndexError to except Exception, it will catch it (but i believe it's still an IndexError). this is python 2.3 on Debian sarge. any ideas? Sounds like IndexError has been redefined somewhere, e.g.: IndexError = 'something entirely different' foo = [] try: foo[42] except IndexError: # will not catch the real IndexError; we're shadowing it pass Try adding print IndexError right before your trouble spot, and see if it outputs exceptions.IndexError. --Ben -- http://mail.python.org/mailman/listinfo/python-list
Re: No
(the Input type = FILE is in the field) please check this out import ftplib import os ... def upload(ftp, file): ext = os.path.splitext(file)[1] if ext in (.txt, .htm, .html): ftp.storlines(STOR + file, open(file)) else: ftp.storbinary(STOR + file, open(file, rb), 1024) ftp = ftplib.FTP(ftp..f2o.org) ftp.login(X, X) upload(ftp, c:\check.jpg) I'm still getting the file not found error: http://img153.imageshack.us/img153/2720/error3ps.jpg I believe the path is kinda wrong or something. But this time, the script is supposed to fetch the file from my pc. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python vs. Lisp -- please explain
Michele Simionato [EMAIL PROTECTED] writes: I replied to this message yesterday, but it did not appear, so let's try again. I agree with your points, but I would not say that Lisp is intrinsically more dynamic than Python as a language; Neither would I -- I don't think either is obviously more dynamic than the other. But since it has been implied that python's comparatively poor performance is simply due to it being more dynamic than other languages, I wanted to point out that one could with just as much justification claim CL to be more dynamic than python (it is in some regards, but not in others -- how to weight them to achieve some overall score is not obvious. I really doubt that python will ever come remotely close to the level of dynamism that now defunct lispmachine technology achieved, though). it is just more interactive and has more features (and more complexities too). Indeed -- CL is much more complex than python and has many, many more warts. As for common lisp being just more interactive -- all things being equal I fail to see how more interactive cannot imply more dynamic -- IMO it doesn't get much more dynamic than changing and inspecting things interactively. Also not all the ways in which CL is more dynamic represent features that increase complexity. For example in CL you could just write def foo(x, l=[], N=len(l)): [...] and have it work as expected because defaults are evaluated on call (this is one of the very rare occassions of an obvious design wart in python, IMO). In other cases, of course, more dynamism seems to involve added complexity. For example CL has sane (dynamically scoped) global variables (and local ones, if you declare them special). I think python is somewhat broken in this regard, but I must admit I have no idea how to implement dynamically scoped variables simply and pythonically, so I wouldn't call it an obvious design flaw. BTW, regarding your first point on interactive sessions, are you aware of Michael Hudson's recipe automatically upgrade class instances on reload() http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/160164 ? Thanks, it's nice to be aware of other solutions, I'll have a closer look at some point. I've of course also written my own code for that purpose -- apart from ipython.el and a couple of private utilities I even got sufficiently pissed off by bugs introduced by python's poor support for serious interactive work that I started writing some sort of versioned module system that kept track of what was being imported from where to where, but I ran out of time and ultimately for this and unrelated reasons switched to matlab in this particular case. Matlab sucks in countless ways, but it gives a superior interactive environment. If you do experimental work where state is expensive to recompute from scratch but where you need to tune various parameters to obtain the desired results, problems introduced by changes not properly propagating are very, very irritating -- especially if you want to keep a record of what changes effected what, so that your experiments are repeatable. 'as -- http://mail.python.org/mailman/listinfo/python-list
Re: Pyserial never read
luca72 wrote: Thanks to all for the help, here you find the code, pls note if i use handshaking = 1 the application don't start. in the delphi configuratio of com port if i use or not handshaking the application work. Best Regards at all Luca import serial import win32file port = 2 Is port = 2 correct? I thought that com ports under windows are designated as a string com1,com2,..etc. baudrate = 38400 bytesize =serial.EIGHTBITS parity =serial.PARITY_ODD stopbits =serial.STOPBITS_TWO timeout = 1 ser = serial.Serial(2, baudrate=38400, bytesize=8, parity=serial.PARITY_ODD, stopbits=2, timeout=3) ct = '' ch = '' a = self.textCtrl1.GetValue() ind = 0 ind1 = 2 lunghezza = len(a) while ind lunghezza : b = a[ind:ind1] b = int(b,16) b = ~b c = ''.join([str((b Digit) 1) for Digit in range(7, -1, -1)]) c1 = c[0:4] c2 = c[4:] c1 = c1[3:] + c1[2:3] + c1[1:2] + c1[0:1] c2 = c2[3:] + c2[2:3] + c2[1:2] + c2[0:1] c1 = hex(int(c1,2)) c2 = hex(int(c2,2)) c1 = c1[2:] c2 = c2[2:] c = c2+c1 ct = ct + c ind = ind + 2 ind1 = ind1 + 2 c = int(c,16) c = chr(c) ch = ch + c ser.write(ch) elf.textCtrl2.SetValue(ct) ser.readline() You might want to try using ser.read() instead of ser.readline() as you may not be getting linefeed carrage return characters . I usually setup a buffer to scan for the characters I expect. Pls.Note i hove also try with read(number of byte ) with inWaiting(), flush etc But no result. Thanks Luca Hope this helps Sam Schulenburg -- http://mail.python.org/mailman/listinfo/python-list
Re: except clause not catching IndexError
Derek Schuff wrote: I have some code like this: code nobody else can run However, when I run it, it seems that I'm not catching the IndexError: Traceback (most recent call last): File /home/dschuff/bin/speeds.py, line 202, in ? if int(toks[2],16) == qaddrs[i]+0x1000 and toks[0] == 200: #producer write IndexError: list index out of range This was good, the actual error; I suspect you overwrote IndexError. The general principal is to boil down your code to the smallest code that exhibits the problem. This is not just to aid us, since usually at some point you delete a block of lines and the problem goes magically away. If i change the except IndexError to except Exception, it will catch it (but i believe it's still an IndexError). This is python 2.3 on Debian sarge. More points for identifying Python version and OS. any ideas? As above, but to test my theory: ... except Exception, e: print 'caught %r: %r (IndexError is %r)' % ( e, e.__class__, IndexError) --Scott David Daniels [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: except clause not catching IndexError
Erwin S. Andreasen wrote: Did you by any chance do something like: except ValueError, IndexError: at some point earlier in this function? That, when catching ValueError assigns the resulting exception to IndexError (and so the following except IndexError: wouldn't work as IndexError is no longer what you think it is). The correct syntax for catching multiple exceptions is: except (ValueError, IndexError), targetVariable: You could verify this by doing a print repr(IndexError) before your line 202, to see that it really is the IndexError builtin. hey, nice catch. In fact I did exactly that. in my search for a solution for this problem i discovered the catch-a-tuple-of-exceptions error, and in fact fixed it, but didn't realize that it was related to the one I posted. (the idea that exceptions can be redefined caught me off guard). thanks (to both of you who responded), -derek -- http://mail.python.org/mailman/listinfo/python-list
Re: Pyserial never read
On 2006-02-22, sam [EMAIL PROTECTED] wrote: luca72 wrote: Thanks to all for the help, here you find the code, pls note if i use handshaking = 1 the application don't start. in the delphi configuratio of com port if i use or not handshaking the application work. Best Regards at all Luca import serial import win32file port = 2 Is port = 2 correct? Read the fine documentation at http://pyserial.sourceforge.net/: Parameters for the Serial class ser = serial.Serial( port=None, #number of device, numbering starts at #zero. if everything fails, the user #can specify a device string, note #that this isn't portable anymore #if no port is specified an unconfigured #an closed serial port object is created baudrate=9600, #baudrate bytesize=EIGHTBITS, #number of databits parity=PARITY_NONE, #enable parity checking stopbits=STOPBITS_ONE, #number of stopbits timeout=None, #set a timeout value, None for waiting forever xonxoff=0, #enable software flow control rtscts=0, #enable RTS/CTS flow control ) I thought that com ports under windows are designated as a string com1,com2,..etc. You can use those as well, but they're non-portable. serial.Serial(port=0) will open the first serial port on either windows or linux. -- Grant Edwards grante Yow! Ha ha Ha ha Ha ha at Ha Ha Ha Ha -- When will I visi.comEVER stop HAVING FUN?!! -- http://mail.python.org/mailman/listinfo/python-list
How to force creation of a .pyc?
I would like to distribute a python program, but only in .pyc form (so that people cannot simply look at my code). Is there a way to do this? I've read up a little on the logic by which python creates .pyc's, and it sounds like python requires the main executed program to be in .py format. Any ideas? Thanks --Steve ([EMAIL PROTECTED]) -- http://mail.python.org/mailman/listinfo/python-list
Re: Pyserial never read
Thanks for the info Grant. It'll teach me not to read the documentation :) Sam -- http://mail.python.org/mailman/listinfo/python-list
Re: No
Gaz wrote: (the Input type = FILE is in the field) please check this out import ftplib import os ... def upload(ftp, file): ext = os.path.splitext(file)[1] if ext in (.txt, .htm, .html): ftp.storlines(STOR + file, open(file)) else: ftp.storbinary(STOR + file, open(file, rb), 1024) ftp = ftplib.FTP(ftp..f2o.org) ftp.login(X, X) upload(ftp, c:\check.jpg) I'm still getting the file not found error: http://img153.imageshack.us/img153/2720/error3ps.jpg I believe the path is kinda wrong or something. But this time, the script is supposed to fetch the file from my pc. Gaz Google file upload cgi. Gerard -- http://mail.python.org/mailman/listinfo/python-list
Re: Tkinter canvas size determination
In article [EMAIL PROTECTED], Dean Allen Provins [EMAIL PROTECTED] wrote: I need to determine the size of a canvas while the process is running. Does anyone know of a technique that will let me do that? . . . Does import Tkinter c = Tkinter.Canvas() c.create_oval(13, 51, 80, 130) 1 c.pack() print c.cget(width) 284 help? There are actually several different notions of the size of a canvas. The example abovve should be a good starting point, though. There's also a mailing list specifically for Tkinter URL: http://tkinter.unpythonic.net/wiki/mailing_20lists ; that might interest you. -- http://mail.python.org/mailman/listinfo/python-list
graph display(please help)
I heard from my friend who used to program in JAVA, it is really easy to do graph display in JAVA. I wonder whether there are similiar packages in Python I can use. Since I know a little bit Python syntax already, I can easily learn more in Python. I want to display connected graph(directed or undirected, most often trees) with coloring on them. Thanks for any suggestions!!! -- http://mail.python.org/mailman/listinfo/python-list
Re: Exiting os.spawnv's subroutine
Strange but removing the try/except part of the second script (leaving only the processing) removed the 2 minute lag at the end of each subroutine. -- http://mail.python.org/mailman/listinfo/python-list
Re: PyUNO with different Python
� wrote: Hi! maybe somebody can give me an hint to my problem setting up PyUNO on my Mac to work with my Python not the Python delivered with OpenOffice. As said in installation instructions I've set OPENOFFICE_PATH=/usr/lib/openoffice/program export PYTHONPATH=$OPENOFFICE_PATH export LD_LIBRARY_PATH=$OPENOFFICE_PATH according to my environment. importing uno gives me this error: import uno Traceback (most recent call last): File stdin, line 1, in ? File /Applications/OpenOffice.org 2.0.app/Contents/openoffice.org2.0/program/uno.py, line 37, in ? import pyuno ImportError: No module named pyuno which means python finds uno but not pyuno (pyuno.dylib). Do you want to use system python inside OOo (inside a macro, or...), or system python outside OOo? For the first, follow this: http://udk.openoffice.org/python/python-bridge.html#replacing for the second: http://udk.openoffice.org/python/python-bridge.html#modes Any hints? Regards, Katja Michele -- http://mail.python.org/mailman/listinfo/python-list
Re: graph display(please help)
questions? wrote: I heard from my friend who used to program in JAVA, it is really easy to do graph display in JAVA. I wonder whether there are similiar packages in Python I can use. Since I know a little bit Python syntax already, I can easily learn more in Python. I want to display connected graph(directed or undirected, most often trees) with coloring on them. The just released yapgvb would seem to fit: http://sourceforge.net/projects/yapgvb Thanks for any suggestions!!! -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: Python vs. Lisp -- please explain
Carl Friedrich Bolz wrote: Paul Rubin wrote: Well. ... the PyPy team works on ... is definitively much too strong. It is more like ... the PyPy team is thinking about It is very unclear whether it will work on a technical level and whether the EU will allow us to allocate resources accordingly. In this thread http://groups.google.com/group/comp.lang.python/msg/5132f0d48c9e7be9 Christian Tismer said that he would work on this, even if this is not pursued by the Pypy team, because he has personal reasons for doing it. So I'm confident that sooner or later, it will be possible to create extension modules written in Rpython. -- http://mail.python.org/mailman/listinfo/python-list
Re: How to force creation of a .pyc?
mrstephengross wrote: I would like to distribute a python program, but only in .pyc form (so that people cannot simply look at my code). Is there a way to do this? I've read up a little on the logic by which python creates .pyc's, and it sounds like python requires the main executed program to be in .py format. Any ideas? If your main program is in main.py, you could perhaps launch it with python -c import main, or make another file which just does import main. Then you could keep just the .pycs/.pyos. But it's possible for a determined user to recover a lot of information about the source code. For example, if I write def foo(a): for i in range(a): print i then dis.dis(foo) 2 0 SETUP_LOOP 25 (to 28) 3 LOAD_GLOBAL 0 (range) 6 LOAD_FAST0 (a) 9 CALL_FUNCTION1 12 GET_ITER 13 FOR_ITER11 (to 27) 16 STORE_FAST 1 (i) 3 19 LOAD_FAST1 (i) 22 PRINT_ITEM 23 PRINT_NEWLINE 24 JUMP_ABSOLUTE 13 27 POP_BLOCK 28 LOAD_CONST 0 (None) 31 RETURN_VALUE where 0..12 makes an iterator for range(a), 16..19 updates i and 22..23 prints it out. It would be possible to turn it into equivalent source code. Decompyle (from http://ftp.debian.org/debian/pool/main/d/decompyle/decompyle_2.3.2.orig.tar.gz) can even do that. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python vs. Lisp -- please explain
Steven D'Aprano wrote: On Tue, 21 Feb 2006 09:46:27 -0800, Donn Cave wrote: In article [EMAIL PROTECTED], Steven D'Aprano [EMAIL PROTECTED] wrote: ... Hey Donn, here is a compiled program for the PowerPC, or an ARM processor, or one of IBM's Big Iron mainframes. Or even a Commodore 64. What do you think the chances are that you can execute it on your x86-compatible PC? It's compiled, it should just work!!! Right? No of course not. If your CPU can't interpret the machine code correctly, the fact that the code is compiled makes NO difference at all. [snip for brevity] Sure, all this is true, except for the term interpreter. You would surely not use the word that way, unless you just didn't want to communicate. Do you honestly believe that the CPU doesn't have to interpret the machine code, or are you just deliberately playing silly buggers with language? In modern CPUs, there is an intermediate layer of micro-code between the machine code your C compiler generates and the actual instructions executed in hardware. But even if we limit ourselves to obsolete hardware without micro-code, I ask you think about what an interpreter does, and what the CPU does, in the most general way possible. Both take a stream of instructions. Both have to take each instruction, and execute it. In both cases the link between the instruction and the effect is indirect: for example, the machine code 0101 on the Zilog Z80 processor causes the CPU to decrement the B processor register. In assembly language this would be written as DEC B. There is absolutely nothing fundamental about the byte value 5 that inherently means decrement B processor register. In other words, machine language is a language, just like it says, and like all languages, it must be interpreted. Your paragraph above that starts with No of course not, even omits a point that everyone understands, you can in fact expect a .py file will work independent of machine architecture - like any interpreted language. Amazing. In your previous post you were telling everybody how the *disadvantage* of interpreted programs is that they won't run unless the interpreter is present, and in this post you are telling us that interpreted languages will just work. What happened to the requirement for an interpreter? Let's see you run that Python program on a Zilog Z80 without a Python interpreter. Can't be done. No interpreter, whether in hardware or software, and the program won't run, whether in source code or byte code or machine code. If I allow that the machines have an interpreter, perhaps you'll return the favour and install an interpreter for machine language (often called an emulator). Now your compiled C or Lisp code also will run independent of machine architecture. In order to force interpreted language and compiled language into two distinct categories, rather than just two overlapping extremes of a single unified category, you have to ignore reality. You ignore interpreted languages that are compiled, you ignore the reality of how machine code is used in the CPU, you ignore the existence of emulators, and you ignore virtual machines. We all know what native code compilation buys you and what it doesn't. Did you fail to learn *anything* from my parable of interpreted Lisp on a Macintosh II running faster than compiled Lisp running on a Mac II fitted with a Lisp processor? -- Steven A different perspective: Although we refer to Lua as an interpreted language, Lua always precompiles source code to an intermediate form before running it. (This is not a big deal: Most interpreted languages do the same.) The presence of a compilation phase may sound out of place in an interpreted language like Lua. However, the distinguishing feature of interpreted languages is not that they are not compiled, but that any eventual compiler is part of the language runtime and that, therefore, it is possible (and easy) to execute code generated on the fly. We may say that the presence of a function like dofile is what allows Lua to be called an interpreted language. p57 Programming in Lua -- http://mail.python.org/mailman/listinfo/python-list
Re: How to force creation of a .pyc?
mrstephengross wrote: I would like to distribute a python program, but only in .pyc form (so that people cannot simply look at my code). Is there a way to do this? I've read up a little on the logic by which python creates .pyc's, and it sounds like python requires the main executed program to be in .py format. Any ideas? Make a dummy script to import your main module. The resulting pyc can be fed directly to the Python interpreter. -- # main.py : My main source code. I cleverly will distribute only the # byte code, such that no one knows my secrets. D'oh! You caught me # monologging again... if __name__ == __main__: print Ha! Now you can't see me. -- # dummy.py : Imports the main module to create main.pyc. import main -- [some client's prompt]% python main.py Ha! Now you can't see me. -- http://mail.python.org/mailman/listinfo/python-list
