Call a python function using os.system

Question

I am calling a function, func_1.py, from my main one (func.py) using

import os
cmd = 'python func_1.py [x y t]'
os.system(cmd)

x, y and t are defined before in func.py.

func_1.py starts with def the_reader(index, x, y, peak_number):. When I run func.py I don't have problem compiling, but func_1.py doesn't do what expected. Am I doing something wrong?

Is there a particular reason you are doing this instead of `import func_1`? — tobias_k, Feb 26 '14 at 13:02
Even though `x`, `y` and `t` are defined as variables, what you pass to `func_1` is just that string. Maybe you should try `'func_1.py %r %r %r' % (x, y, t)`? — tobias_k, Feb 26 '14 at 13:03

score 1 · Accepted Answer · answered Feb 26 '14 at 13:11

You can only pass in strings into the system command. You are passing the command line parameter "[x y t]". You have to extract the variables before the command. I believe that your statement on the command line == python func_1.py [x y t] # No values just "[x y t]"

import os
cmd = "python func_1.py " + str(x) +" "+ str(y) +" "+ str(t)
os.system(cmd)

Call a python function using os.system

1 Answers1