Calling C programs

[C GIllespie]

Dear All,

I have a simple C program which outputs a string. I want to be able to call
this progam from python and assign the output to a variable. What's the best
way to do this?

I've tried

os.system('/tmp/hello')
and
os.execv('/tmp/hello',[' '])

but I can't seem to store the return value.

Many thanks

Colin

 

[Diez B. Roggisch]

Use module popen2.

 

[Bjoern Paschen]

I have a simple C program which outputs a string. I want to be able to
call this progam from python and assign the output to a variable. What's
the best way to do this?
I've tried
os.system('/tmp/hello')
os.execv('/tmp/hello',[' '])
but I can't seem to store the return value.

One possible way is to use os.popen().
http://www.python.org/doc/current/lib/os-newstreams.html

Bjoern

 

[Miki Tebeka]

Hello Colin,

I have a simple C program which outputs a string. I want to be able to call
this progam from python and assign the output to a variable. What's the best
way to do this?

from os import popen
print popen("/tmp/hello").read()

See http://www.python.org/doc/current/lib/os-process.html

HTH.
Miki

 

[C GIllespie]

from os import popen

print popen("/tmp/hello").read()

What about if I want to pass an argument?

I've tried

input,output=popen2('/tmp/hello')

input.write("Some string")

input.close() # I get an error here.

Thanks

Colin

 

[Peter Maas]

What about if I want to pass an argument?

Via commandline? This way:

print popen("/tmp/hello anArgument").read()

Mit freundlichen Gruessen,

Peter Maas