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import subprocess
# print ’popen3:’
def external_cmd(cmd, msg_in=''):
try:
proc = subprocess.Popen(cmd, shell=True, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE,)
stdout_value, stderr_value = proc.communicate(msg_in)
return stdout_value, stderr_value
except ValueError, err:
# log("IOError: %s" % err)
return None, None
if __name__ == '__main__':
stdout_val, stderr_val = external_cmd('ls -l')
print 'Standard Output: %s' % stdout_val
print 'Standard Error: %s' % stderr_val