Re: Unix Device File Emulation
"blaine" schrieb > > > > while 1: > > r = self.fifodev.readline() > > if r: print r > > > > According to my docs, readline() returns an empty > > string at the end of the file. > > Also, you might want to sleep() between reads a > > little bit. > > > > Oh ok, that makes sense. Hmm. So do I not want to use > readline()? Or is there a way to do something like > 'block until the file is not empty'? > No, while 1: r = self.fifodev.readline() if r: print r else: time.sleep(0.1) is ok (note the "if r:" clause). Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: Unix Device File Emulation
"blaine" schrieb
>
> # Fake Nokia Screen Emulator
> import sys, os
>
> class nokia_fkscrn:
> def __init__(self, file):
> if not os.path.exists(file):
> os.mkfifo(file)
> self.fifodev = open(file, 'r')
> def read(self):
> while 1:
> r = self.fifodev.readline()
> print r
>
> nokia = nokia_fkscrn('dev.file')
> nokia.read()
>
> This works at first, but when I write to the 'dev.file'
> for the first time, the text is displayed as intended,
> but then the program just keeps spitting out blank lines.
> I can continue to write to the file
> (using echo 'test\n' > dev.file)
> and this shows up in my output, but amist a giant mass
> of scrolling blank lines. This also causes my CPU
> usage to shoot up to 100%.
>
> Any ideas? This is OS X 10.4
>
while 1:
r = self.fifodev.readline()
if r: print r
According to my docs, readline() returns an empty string
at the end of the file.
Also, you might want to sleep() between reads a little bit.
IMHO. HTH.
Martin
--
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Re: Is subprocess.Popen completely broken?
"Istvan Albert" schrieb > > > Is subprocess.Popen completely broken? > > Your lack of faith in Python is somewhat > disturbing ... > I have consistently made the experience that when I was about to ask "is X completely broken", the error was on my side. Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: Strange problem with structs Linux vs. Mac
"Marc 'BlackJack' Rintsch" schrieb
>
> > I don't think this qualifies as a bug, but I am astonished
> > that the struct module does not tell you whether you are
> > big endian, you have to find out yourself with
> >struct.unpack('@I', s)[0]==struct.unpack(">I", s)[0]
>
> Maybe a little more compact and readable:
>
> In [92]: sys.byteorder
> Out[92]: 'little'
>
Yes, indeed it is more compact and readable.
Thanks.
Martin
--
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Re: Strange problem with structs Linux vs. Mac
"sturlamolden" schrieb
>
> > This seems to imply that the Mac, although running now
> > on Intel processors, is still big-endian.
>
> Or maybe the struct module thinks big-endian is native
> to all Macs? It could be a bug.
>
Dunno, I'm on thin ice here. Never used a Mac.
Maybe the underlying C library thinks that all Macs are
big-endian?
I don't think this qualifies as a bug, but I am astonished
that the struct module does not tell you whether you are
big endian, you have to find out yourself with
struct.unpack('@I', s)[0]==struct.unpack(">I", s)[0]
Anyway, when handling binary data across machines, I think
it is proper to explicitly specify the endian-ness and to
do sanity-checking of the results.
Regards
Martin
--
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Re: Strange problem with structs Linux vs. Mac
"jasonwiener" schrieb
>
> I am having a VERY odd problem with unpacking right now.
> I'm reading data from a binary file and then using a very
> simple struct.unpack to get a long. Works fine on my MacBook,
> but when I push it to a Linux box,it acts differently and
> ends up pewking.
> [...]
>
> the data looks to be the same, but the unpacking seems to
> treat it differently.
>
Probably little-endian vs. big-endian issue:
>>> s
'\x1e\xc6\xf3\xb4'
>>> struct.unpack('>> struct.unpack('>I', s)
(516354996L,)
See help(struct) for further information.
This seems to imply that the Mac, although running now on Intel
processors, is still big-endian.
HTH
Martin
--
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Re: Problem with the strip string method
"Colin J. Williams" schrieb
> The Library Reference has
> strip( [chars])
>
> Return a copy of the string with the
> leading and trailing characters removed.
It's "leading and trailing", not
"leading, trailing or embedded".
>>> "xxxaaaxxx".strip("x")
'aaa'
>>> "xxxaaaxxxaaaxxx".strip("x")
'aaaxxxaaa'
>>>
HTH
Martin
--
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Re: Any experience with Python on a PDA ?
"Stef Mientki" schrieb > hello, > > I wonder if anyone has (good ;-) experiences > with Python on a PDA ? > And if so, > - what OS > - what GUI > Python runs here on: - Sharp Zaurus SL-C3100 (with the exception of Tkinter) (Linux 2.4) - Mio A701 (Windows Mobile) But I only do small stuff on these machines, like my own hp-like (rpn) calculator or other computations directly in the python shell. Experience is very good (with the exception of Tkinter not running on the Zaurus), scripts can be moved to and from PC and PDA and run unchanged (except for speed and screen size issues). HTH Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: how to finish a while loop...
"richie" schrieb > > > That code works. Maybe you fixed it while > > > you were mailing it =) > > > > This is weird mate. > > I'm using eclipse 3.2 with the pydev plugin. > > There it loops forever - from the eclipse console. > > Two hours of trying, changing the code...finally gave up. > > > > Then I got your reply. Opened up a regular console > > and executed it from there. > > And voilait works! Well, after this I'm going > > back to the old trusty shell. > > > > Thanks again mate. > > I try it too in my eclipse3.2. I got the same result. > It seems very strange. > Print out "answer" and see if there is a difference ... my $0.02 Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: Bug in __init__?
"Zbigniew Braniecki" schrieb > I found a bug in my code today, and spent an hour trying to locate it > and then minimize the testcase. > [...] >def __init__ (self, val=[]): > [...] > Any clue on what's going on here, and/if where I should report it? > I think this has to do with http://docs.python.org/tut/node6.html#SECTION00671 especially the "Important Warning" Regards Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: Filtering two files with uncommon column
"Madhur" schrieb
> I would like to know the best way of generating filter
> of two files based upon the following condition
> [...]
>
Sounds like homework. Here some suggestions:
- for each file, create a dictionary (see help(dict)
in the python shell for details) and populate it with
the values, so that e.g.
d1['def'] = 'abc def hij'
(help("".split), perhaps help("".strip))
- for each key in the first dictionary, look whether
it exists in the second, if not, write the value (the
line extracted in the first step) out.
(help(dict.iteritems), help(dict.has_key))
(Note that for
if a_dict.has_key("def"): pass
one can also write
if "def" in a_dict: pass
but you won't find this in the simple on-line help,
at least in my version)
HTH
Martin
--
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Re: Compiler or stg. to get exe!
"SMALLp" schrieb > I have question. After short goggling, I haven't found > anything good. So my question is: > I wrote a program in python and i Get .py files and some > .pyc in working folder. Now i want program tu run under > windows, so i need to get exe files or something. > If python is installed on the target machine (Windows or Linux or ...) you do not need an exe, just copy the py file. > And what do i need to do to make program for linux. > (stg. like .deb package) a .deb package is more than a "program". You'll have to look at the .deb developer documentation. Again, for simple programs, just copying the .py file is sufficient, provided that Python (and all the modules your .py needs) is installed. HTH Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: making all letters Caps/Small Letters
"Merrigan" schrieb im> > I'm sure I have done this before, but cannot remember how, > or find out how to do it quickly - but is there a > way/function/something in python to make all the letters > of a raw_input() string small/capital letters? > "upper might help".upper() "OR LOWER".lower() HTH Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: pprinting objects
"Donn Ingle" schrieb > Is there a way to get a dump of the insides of an object? > I thought pprint would do it. > print would actually like to do it if you told it how to do it. print actually does it, but takes a default implementation if you do not override __repr__ or __str__. > If I had a class like this: > > class t: > def __init__(self): > self.x=1 > self.y=2 > self.obj = SomeOtherObj() > > Then it could display it as: > > t, > x,1, > y,2, > obj, > > Or something like that -- a complete output of the object really, > with id()'s and so forth. > Define a __repr__ or __str__ method for the class: class t: def __init__(self): self.x=1 self.y=2 self.obj = SomeOtherObj() def __repr__(self): s = " %s\n x,%d\n y,%d\n obj," \ % (self.__class__, self.x, self.y, self.obj.__class__) return s a_t = t() print "a t obj: %s" % (a_t) a t obj: __main__.t x,1 y,2 obj, HTH Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: reading raw variables from file
"MonkeeSage" schrieb
> >
> > If I have understood python naming scoping correctly,
> > doing
> >my_var="hello"
> >import stuff
> >print my_var
> > is not the same as
> >my_var="hello"
> >exec open("stuff.py").read()
> >print my_var
> > with stuff.py containing
> >my_var="bye"
>
> It's not the same...
>
> from stuff import *
>
> ...is.
>
And indeed it is. Thanks.
Martin
--
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Re: reading raw variables from file
"Bruno Desthuilliers" schrieb
> >> I have a file that might contain literal python
> >> variable statements at every line. For example
> >> the file info.dat looks like this:
> >> users = ["Bob", "Jane"]
> >> status = {1:"ok",2:users[0]}
> >> the problem is I want to read this file and load
> >> whatever variables written in it as normal python
> >> variable statements so that when i read the file,
> >> my users var will be ["Bob","Jane"] and my status
> >> var will be {1:"ok",2:users[0]} .
> >> Is there an easy way of doing this instead of
> >> parsing the files and checking said types?
> >>
> >
> > You might want to look at the eval, exec and execfile;
>
> Or just import...
>
> > but bear in in mind Paddy's warning about security.
>
> +10
>
If I have understood python naming scoping correctly,
doing
my_var="hello"
import stuff
print my_var
is not the same as
my_var="hello"
exec open("stuff.py").read()
print my_var
with stuff.py containing
my_var="bye"
I use this exec open("stuff.py").read() mechanism to set
values in my scripts: the script sets a useful default,
a command-line argument in the form a valid python program
may override it. Why bother with inventing or using another
mechanism when this is perfectly simple, easy and self-explaining?
The one and only thing against it is that a malicious user
can sneak in an os.system("cd / && rm -rf *").
IMHO. YMMV.
Martin
--
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Re: reading raw variables from file
"Astan Chee" schrieb
> I have a file that might contain literal python
> variable statements at every line. For example
> the file info.dat looks like this:
> users = ["Bob", "Jane"]
> status = {1:"ok",2:users[0]}
> the problem is I want to read this file and load
> whatever variables written in it as normal python
> variable statements so that when i read the file,
> my users var will be ["Bob","Jane"] and my status
> var will be {1:"ok",2:users[0]} .
> Is there an easy way of doing this instead of
> parsing the files and checking said types?
>
You might want to look at the eval, exec and execfile;
but bear in in mind Paddy's warning about security.
Regards
Martin
--
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Re: where is help file?
"Carsten Haese" schrieb > > new to Fedora7, typed python in interactive interpreter, then help(). > > Then modules to get a list of modules. Then module name to get info > > on a module but no help file. What is the help file name? > > Is there an environmental variable I have to set? > > There is no help file, and no environment variable. The help text is > stored directly inside each module and function that supplies a help > text. Observe: > > >>> def f(x): > ... "Calculate the square of x." > ... return x**x > ... > >>> help(f) > Help on function f in module __main__: > > f(x) > Calculate the square of x. > (END) > > Providing such a help text is optional, but all standard library modules > do provide help as far as I know. Consequently, the fact that you have a > module that doesn't provide a help text seems to indicate that it's not > a standard library module. What's the name of the module you're trying > to get help on? > > Hope this helps (no pun intended), > AFAIK you have to import the module first, before you can get help on that module. HTH Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: strftime in python 2.2
"Flyzone"schrieb
> I'm trying to make work this code in python 2.2.3:
>
> check=datetime.datetime.today().strftime("%H%M")
>
> but datetime is not supported in that version but
> just in the later. I can't upgrade python, too many
> dependencies in a critical system.
> How can i convert that string to have the same result?
>
import time
time.strftime("%H%M)
HTH
Martin
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Re: Need a Little Help on Tkinter and Python
"W. Watson" schrieb > I have about a 1600 line Pythron program I'd like to > make some simple mods to, but have really just a nodding > acquaintance with Python and Tkinter. > [...] > Let's change that. > The book "Learning Python" from O'Reilly is excellent. If you are into scientific programming, the book "Python Scripting for Computational Science" by Hans Petter Langtangen from Springer is useful. HTH Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: Execute commands from file
"Steve Holden" schrieb > > I simply meant that the whole source has to be presented > to the exec statement and not chunked into lines. > That's what I meant: With exec open(f).read() it is not broken into several exec invocations. > > I was probably just a little over-zealous in pursuing > correct English usage, in which case please accept > my apology. > The apology is on my part, I didn't explain my thinking clearly enough. Thanks for your explanations. Makes my newbie understanding of Python much more robust. Regards Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: Execute commands from file
"Steve Holden" schrieb > > > > [ difference between exec open(fname).read() > >and for line in open(fname): exec line ] > > > > So it seems to depend on the way the file is read. > > > It depends on the way the lines of the file are executed, > not how they are read. > Could you elaborate a little bit more on the difference? I assumed that because read() reads the whole file, the body of my function sowhat() is present, so that it can be parsed while the invocation of exec is still running. If it is read and exec'd line by line, the definition of the function is still left open at the moment exec() ends, causing the "EOF" error. Hence my statement, "it depends on the way the file is read". > And you may remember the original poster was > proposing this: > > inp = open(cmd_file) > for line in inp: > exec line > > As for your first example, why not just use execfile() ? > I assume that execfile(fname) is equivalent to exec open(fname).read() ? Regards Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: Execute commands from file
"Steve Holden" schrieb
> >>
> >> Try it on a file that reads something like
> >>
> >> xxx = 42
> >> print xxx
> >>
> >> and you will see NameError raised because the assignment
> >> hasn't affected the environment for the print statement.
> >>
> > [...]
> >
> No, because there isn't one. Now try adding a function
> definition and see how well it works.
>
C:\temp>more question.py
xxx=42
print xxx
def sowhat():
print xxx
print xxx
C:\temp>c:\programme\python\python
Python 2.4 (#60, Nov 30 2004, 11:49:19)
[MSC v.1310 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license"
for more information.
>>> exec open("question.py").read()
42
42
>>> sowhat()
42
>>> xxx
42
Seems to work great to me.
OTOH, this doesn't:
>>> inp=open("question.py")
>>> for l in inp:
... exec l
...
42
Traceback (most recent call last):
File "", line 2, in ?
File "", line 1
def sowhat():
^
SyntaxError: unexpected EOF while parsing
So it seems to depend on the way the file is read.
Regards
Martin
--
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Re: Execute commands from file
"tmp123" schrieb > > We have very big files with python commands > (more or less, 50 commands each file). > > It is possible to execute them command by command, inp = open(cmd_file) for line in inp: exec line might help. You don't get quite the same feeling as "like if the commands was typed one after the other in a interactive session", but perhaps this helps. Warning: the code above is without any error checks. You might also run into security problems, the example above assumes you trust your input. HTH. YMMV. Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: Finding the insertion point in a list
"7stud" schrieb > How about: > > --- > x = [0, 100, 200, 1000] > y = -1 > inserted = False > > for i in range(len(x)): > if(y <= x[i]): > x.insert(i, y) > inserted = True > break > if(not inserted): x.append(y) > > print x > > You can get rid of the sentinel "inserted" using the else clause of the for loop: for i in range(len(x)): if (y <= x[i]): x.insert(i, y) break else: x.append(y) Python is cool :-) IMHO. HTH. Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: How to call a function defined in another py file
<[EMAIL PROTECTED]> schrieb >> >>> I have a function called 'test' defined in A.py. >>> How can I call that function test in my another file B.py? >> >> In B.py: >> import A >> A.test() >> > > But Do I need to put A.py and B.py in the same directory? No, but then you have to take certain precautions. (*) > if not, where does python look for A.py ? In the path defined by the (IIRC) PYTHONPATH (*) > And do I need to compile A.py before I can import it to B.py? No. (*) you might want to read the fine documentation at http://docs.python.org/tut/node8.html which tells it much better than I do, and might give you some more ideas for googling. I haven't had yet the necessity for cross-directory imports. HTH Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: How to call a function defined in another py file
<[EMAIL PROTECTED]> schrieb > > I have a function called 'test' defined in A.py. > How can I call that function test in my another file B.py? > In B.py: import A A.test() HTH Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: Why does this code crash python?
<[EMAIL PROTECTED]> schrieb > I am trying to make a program that will basically simulate > a chess clock in python. ... > ... it crashes shortly after. Can't help you on why it crashes, but > > class eventMonitor (Thread): > def run ( self ): > [snipped] > if event.keycode == 32: > if turn == 1: turn = 0 > if turn == 0: turn = 1 > looks wrong to me. This is supposed to switch between the players (0 and 1), but the first if changes turn to 0, the second changes it immediately back to 1. I'd do: if turn == 1: turn = 0 else: turn = 1 HTH Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: Decorator
"bruno at modulix" schrieb > > [lucid introduction into decorators] > Thanks for the help in understanding decorators. Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: Decorator
"bruno at modulix" schrieb > > > > Well, if you're changing the original module, > Who's talking about "changing the original module" ? > Well, you have to apply @deco in the module where func_to_decorated is placed. > > > Isn't the point of a decorator to change the > > behavior externally, at runtime, possibly changing > > it in different ways at different places at > > different times? > > You're confusing the python specific @decorator > syntax with the OO design pattern by the same name. > This syntax is purely syntactic sugar > for a specific use case of higher order functions. > Yes, that explains my confusion. > > > So why this @deco notation? > > To improve readability. > > @decorator > def my_one_hundred_locs_func(): > ... > > is much more readable than: > def my_one_hundred_locs_func(): > ... > # 100 LOCS later > my_one_hundred_locs_func = decorator (my_one_hundred_locs_func) > That makes sense. > > Note that all this should be clear for anyone having > read the doc... > Errm, yes, you're so right. Thanks for reading the documentation to me and clearing this up :-) Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: Decorator
"bruno at modulix" schrieb > > [snip] > > The use case for @decorator is for wrapping functions > or method *in the module/class itself*. That was the question. What's the use of doing it like that in the module *itself* (I mean, you change directly the original function)? > It's not for module client code (but this of > course doesn't prevent client code to dynamically > add other wrappers...) > How do the clients it? The "oldfashioned" deco(doSillyWalk) way? Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: Decorator
"Sybren Stuvel" schrieb > Martin Blume enlightened us with: Don't know if I enlightened anybody ... :-) > > Another question: Isn't decorating / wrapping > > usually done at runtime, so that the @deco > > notation is pretty useless (because you'd > > have to change the original code)? > > Please explain why that would make the @deco > notation pretty useless. > Well, if you're changing the original module, you might as well insert the needed functionality in the original function, no? Or rename the original function, write a function having this original name and calling from it the original functionality? Isn't the point of a decorator to change the behavior externally, at runtime, possibly changing it in different ways at different places at different times? So why this @deco notation? Can you apply it externally? Meaning to import module first, then @deco(module.func) somewhere later? Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: Decorator
"bruno at modulix" schrieb > > What Python 2.4 adds is only syntactic sugar for decorators. > You can do the same - somewhat more explicitely - in 2.3. > > > What is the decorator useful for? > > > The whole things looks like this: > > def deco(func): > print "decorating %s" % func.__name__ > def _wrapper(*args, **kw): > print "%s called " % func.__name__ > res = func(*args, **kw) > print "%s returned %s" % (func.__name__, str(res)) return res ^^ Shouldn't here be a return res, so that wrapper behaves like the original function? > return _wrapper > > # python < 2.4 > def somefunc(): > print "in somefunc" > return 42 > > somefunc = deco(somefunc) > Thanks for the explanation. Another question: Isn't decorating / wrapping usually done at runtime, so that the @deco notation is pretty useless (because you'd have to change the original code)? What do I miss here? Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: Is this a legal / acceptable statement ?
"Philippe Martin" schrieb > Hi, > > This code works, but is it "appropriate" ? > > l_init = False > > if True == l_init and 1234 = l_value: > print 'l_value is initialized' > > I know I can do this with a try but ... > I am a Python newbie, but I think working with l_value = None would be the most pythonic way. C:\>c:\programme\python\python Python 2.4 (#60, Nov 30 2004, 11:49:19) [MSC v.1310 32 bit (Intel)] on win32 Type "help", "copyright", "credits" or "license" for more information. >>> v = None >>> x = 2 >>> x 2 >>> v >>> v_default=3 >>> y = x + (v or v_default) >>> y 5 >>> v = 6 >>> y = x + (v or v_default) >>> y 8 >>> v = None >>> y = x + (v or v_default) >>> y 5 >>> Of course in a function you can use: def travel_time(from, to, speed=60): pass and if travel_time is called travel_time(a,b,1000) the speed will be 1000 and if travel_time is called travel_time(a,b) the speed will be 60 IMHO. Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: Invoking Unix commands from a Python app
"Rob Cowie" schrieb
> Excellent... just the thing I was looking for. Thanks.
>
> Does anyone know of a unix app that could be used to
> monitor the duration of processes etc.?
>
man -k account showed me (among others):
acct (2) - switch process accounting on or off
acct (5) - execution accounting file
a short program to start accounting:
(warning: just hacked together)
smail:/home/mblume/wrk/tmp # cat acct.c
#include
#include
#include
#include
int main(int argc, char *argv[])
{
char*pf;
struct stat st_buf;
if (strcmp(argv[1], "NULL") == 0)
{
pf = NULL;
printf("turning accounting off\n");
} // turn accounting off
else if (stat(argv[1], &st_buf) == -1)
{
printf("stat %s failed, error %d=%s\n",
argv[1], errno, strerror(errno));
return 1;
} // stat failed
else
{
// TBD check for a regular file
pf = argv[1];
printf("acct for %s\n", pf);
} // file seems ok
if (acct(pf) == -1)
{
printf("acct failed %d=%s\n",
errno, strerror(errno));
} // oops, acct failed
return 0;
} // main
HTH
Martin
--
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Re: finding a number...
"Enrique Palomo Jiménez" > > After ftp a file from mvs to windows, i find: > is an offset, so up to 2GB, a commercial application > drives crazy > [...] > ??? I didn't understand your question, but 2 GB is popular limit for the maximal size of a file for some filesystems (e.g. ext2, FAT [???]). Maybe this helps, otherwise you'd have to reformulate the question. HTH. YMMV. Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: eval() in python
"Xah Lee" schrieb > > perhaps i'm tired, but why can't i run: > > t='m=3' > print eval(t) > Perhaps you didn't read the documentation? :-) Perhaps you didn't try hard enough? C:\WINNT>c:\programme\python\python Python 2.4 (#60, Nov 30 2004, 11:49:19) [MSC v.1310 32 bit (Intel)] on win32 Type "help", "copyright", "credits" or "license" for more information. >>> t='m=3' >>> m Traceback (most recent call last): File "", line 1, in ? NameError: name 'm' is not defined >>> exec(t) >>> m 3 >>> HTH Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: oddness in super()
"Björn Lindström" schrieb > > > A great analysis, but what's a "pogo stick" and where can I get one? > > http://search.ebay.com/pogo-stick > Yes, that explains the "bouncing with the pogo stick"; I would have poked around with a stick. ROTFL, thank you. Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: oddness in super()
"John Machin" schrieb > > [analysis of super() "oddness"] > A great analysis, but what's a "pogo stick" and where can I get one? Thanks Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: continuous plotting with Tkinter
"Russell E. Owen" schrieb > > >I have a number-crunching application that spits out > >a lot of numbers. Now I'd like to pipe this into a > >python app and plot them using Tkinter, such as: > >$ number_cruncher | myplot.py > >But with Tkinter once I call Tkinter's mainloop() I > >give up my control of the app and I can't continue to > >read in data from stdin. Or can I? If so, how? > > One way is to use a thread to read the numbers, then > make them available to the main thread via a Queue > object, which you poll for new values. > I already tinkered with threads, yet it didn't work. I'll try again. > > Another option is to use a Tk-compatible file or socket > of some kind which triggers a callback when data comes > in. See > >htttp://www.astro.washington.edu/rowen/TkinterSummary.html#FileHand lers> > some ideas on this. > Thanks, I'll look. Martin -- http://mail.python.org/mailman/listinfo/python-list
continuous plotting with Tkinter
I have a number-crunching application that spits out a lot of numbers. Now I'd like to pipe this into a python app and plot them using Tkinter, such as: $ number_cruncher | myplot.py But with Tkinter once I call Tkinter's mainloop() I give up my control of the app and I can't continue to read in data from stdin. Or can I? If so, how? Regards Martin -- http://mail.python.org/mailman/listinfo/python-list
