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looking for a simple way to load a program from another python program..

P: n/a
I was looking for a simple way to load a simple python program from
another python program.

I tried

os.system(cabel)

The file name is cabel.py a csound instrument editor..

The error I am getting is

Traceback (most recent call last):
File "C:\Python24\Lib\site-packages\boa-constructor\test of
snake\Frame1.py", line 212, in OnCabelItems0Menu
os.system(cabel)
NameError: global name 'cabel' is not defined
Localisation of messages is disabled, using default language.
time resolution is 279.365 ns

This is with cabel in the current directory. I have managed to use
import to run it but it will only do it once. I may be able to use the
exec commands but I don't want to exit the program I am using only to
run other programs and then exit. I would also perfer that cabel is in
it's own directory.

thanks in advance for any help

http://www.stormpages.com/edexter/csound.html

Aug 13 '06 #1
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8 Replies


P: n/a
Er*********@msn.com wrote:
I was looking for a simple way to load a simple python program from
another python program.

I tried

os.system(cabel)

The file name is cabel.py a csound instrument editor..

The error I am getting is

Traceback (most recent call last):
File "C:\Python24\Lib\site-packages\boa-constructor\test of
snake\Frame1.py", line 212, in OnCabelItems0Menu
os.system(cabel)
NameError: global name 'cabel' is not defined
Localisation of messages is disabled, using default language.
time resolution is 279.365 ns

This is with cabel in the current directory. I have managed to use
import to run it but it will only do it once. I may be able to use the
exec commands but I don't want to exit the program I am using only to
run other programs and then exit. I would also perfer that cabel is in
it's own directory.

thanks in advance for any help

http://www.stormpages.com/edexter/csound.html
Read the docs: os.system() takes a string. You're calling it with an
uninitialized variable name. Unless you have something like "cabel =
'cabel'" somewhere before your call os.system() you can expect that
error.

"import cabel" will only work once because python's module import
mechanism caches imported modules to save time when a script imports
them more than once. To force the module to be reloaded use the reload
function: "reload(cabel)"

os.system() docs: http://docs.python.org/lib/os-process.html#l2h-1692
(But see the subprocess module too:
http://docs.python.org/lib/module-subprocess.html)

Peace,
~Simon

Aug 13 '06 #2

P: n/a
Hi Eric

Check that ".py" and ".pyw" are in your PATHEXT environment variable
(are you using Windows?). Then, if the folder that cabel is in is in
your PATH environment variable, and the correct association for .py
files is set up (i.e. they get run by python.exe),

either
os.system('cabel')
or
os.system('cabel.py')

should work.

Alternatively, you could not do any of those things, and run

os.system('python cabel.py')

with 'cabel.py' in the same folder as the parent script, and that
should work too, assuming that the path to your python executable is on
the PATH environment variable.

If you run other commands from python quite frequently, it is probably
a good idea to look into the "os.popen" set of commands, for more
flexibilty.

Caleb

Aug 13 '06 #3

P: n/a

Caleb Hattingh wrote:
Hi Eric

Check that ".py" and ".pyw" are in your PATHEXT environment variable
(are you using Windows?). Then, if the folder that cabel is in is in
your PATH environment variable, and the correct association for .py
files is set up (i.e. they get run by python.exe),

either
os.system('cabel')
or
os.system('cabel.py')

should work.

Alternatively, you could not do any of those things, and run

os.system('python cabel.py')

with 'cabel.py' in the same folder as the parent script, and that
should work too, assuming that the path to your python executable is on
the PATH environment variable.

If you run other commands from python quite frequently, it is probably
a good idea to look into the "os.popen" set of commands, for more
flexibilty.

Caleb
import cabel and reload(cabel) seem to work fine. I am not sure why I
am having trouble with os.system . Tells me it isn't a command.
thanks for the help, I will look into os.popen to see what it does.
would there be ay

Aug 13 '06 #4

P: n/a

Caleb Hattingh wrote:
Hi Eric

Check that ".py" and ".pyw" are in your PATHEXT environment variable
(are you using Windows?). Then, if the folder that cabel is in is in
your PATH environment variable, and the correct association for .py
files is set up (i.e. they get run by python.exe),

either
os.system('cabel')
or
os.system('cabel.py')

should work.

Alternatively, you could not do any of those things, and run

os.system('python cabel.py')

with 'cabel.py' in the same folder as the parent script, and that
should work too, assuming that the path to your python executable is on
the PATH environment variable.

If you run other commands from python quite frequently, it is probably
a good idea to look into the "os.popen" set of commands, for more
flexibilty.

Caleb
import cabel and reload(cabel) seem to work fine. I am not sure why I
am having trouble with os.system, probily something to do with the
path. Is one better than the other when it comes to distributing
software?? Thanks for the help. Hopefully this message I get isn't
anything important.. (I will have to look into os.popen later.

Localisation of messages is disabled, using default language.
time resolution is 279.365 ns

Aug 13 '06 #5

P: n/a
Try this:

import os
os.startfile('cabel.py')

This should work with any program or file, not only python ones.

Hope this helps,
Luis

Aug 13 '06 #6

P: n/a
Er*********@msn.com wrote:
I was looking for a simple way to load a simple python program from
another python program.

I tried

os.system(cabel)

The file name is cabel.py a csound instrument editor..

The error I am getting is

Traceback (most recent call last):
File "C:\Python24\Lib\site-packages\boa-constructor\test of
snake\Frame1.py", line 212, in OnCabelItems0Menu
os.system(cabel)
NameError: global name 'cabel' is not defined
Localisation of messages is disabled, using default language.
time resolution is 279.365 ns

This is with cabel in the current directory. I have managed to use
import to run it but it will only do it once. I may be able to use the
exec commands but I don't want to exit the program I am using only to
run other programs and then exit. I would also perfer that cabel is in
it's own directory.

thanks in advance for any help

http://www.stormpages.com/edexter/csound.html
I am new to Python coding myself, but I've found that the easiest way to
start another script from within a script, is to use the
execfile('filename.py') command.

There may be better ways of loading other Python scripts -- better ways that
I'm not yet aware of -- but execfile() works for me.
--
--
There are several things that I will never be:
* I will never be attracted to females.
* I will never enjoy the company of others.
Exactly how these realities bode for my enemy, is not of my concern.

Aug 14 '06 #7

P: n/a
At Sunday 13/8/2006 16:51, Er*********@msn.com wrote:
I was looking for a simple way to load a simple python program from
another python program.

I tried

os.system(cabel)

The file name is cabel.py a csound instrument editor..

NameError: global name 'cabel' is not defined
Have you tried os.system("cabel.py")

Gabriel Genellina
Softlab SRL

__________________________________________________
Preguntá. Respondé. Descubrí.
Todo lo que querías saber, y lo que ni imaginabas,
está en Yahoo! Respuestas (Beta).
¡Probalo ya!
http://www.yahoo.com.ar/respuestas

Aug 14 '06 #8

P: n/a

Gabriel Genellina wrote:
At Sunday 13/8/2006 16:51, Er*********@msn.com wrote:
I was looking for a simple way to load a simple python program from
another python program.

I tried

os.system(cabel)

The file name is cabel.py a csound instrument editor..

NameError: global name 'cabel' is not defined

Have you tried os.system("cabel.py")
That did not seem to work, os.startfile worked great. I haven't tried
passing commands to csound with it yet but maybe os.sytem will work
better with that than it did python since I got the idea to use that to
pass arguments to them from a csound example. won't have time until
this weekend to try that though, or the exec(file)..

http://www.stormpages.com/edexter/csound.html

Aug 15 '06 #9

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