python noob

[Flynn555]

hello im trying to call and pass arguments to an external program in python.

ex call:
./asdf.py ./asdf.rb

./asdf.rb is stored in sys.argv[1]

the problem is that ./asdf.rb is not recieving any of the arguments.
here is my code.

   
from popen2 import Popen3
import sys
 
str = "1 2 3 4" # string of arguments
call = Popen3('sys.argv[1] %str', True) # argv[1] = ./asdf.rb 
call_out = call.fromchild.readlines()
print call_out

any pointers would be awesome
thanks

[unutbu]

Hi Flynn555. The popen2 module is deprecated.
I believe you are encouraged to use the subprocess modules instead.

Maybe this would work for you?

#!/usr/bin/env python
from subprocess import Popen,PIPE
import sys
 
str = "1 2 3 4" # string of arguments
cmd='%s %s'%(sys.argv[1],str)
print(cmd)
call=Popen(cmd, shell=True, stdout=PIPE) # argv[1] = ./asdf.rb 
call_out=call.communicate()[0]
print call_out 

See http://docs.python.org/library/subpr...ule-subprocess
and http://blog.doughellmann.com/2007/07...ubprocess.html.

[Flynn555]

Hi Flynn555. The popen2 module is deprecated.
I believe you are encouraged to use the subprocess modules instead.

Maybe this would work for you?

#!/usr/bin/env python
from subprocess import Popen,PIPE
import sys
 
str = "1 2 3 4" # string of arguments
cmd='%s %s'%(sys.argv[1],str)
print(cmd)
call=Popen(cmd, shell=True, stdout=PIPE) # argv[1] = ./asdf.rb 
call_out=call.communicate()[0]
print call_out 

See http://docs.python.org/library/subpr...ule-subprocess
and http://blog.doughellmann.com/2007/07...ubprocess.html.

hey, thanks!