Python无法使用sh或bash执行终端脚本

Question

This question already has an answer here:

• Can I use an alias to execute a program from a python script 5 answers

i hope you guys can help me with this problem because i'm really stuck... I'm trying to execute a program from python and, for some reason, it doesn't work. The script is located at:

path/to/teqc

I've added this line to the .bashrc file:

alias teqc='path/to/teqc'

and, when i run

teqc -tr d input >output

on a terminal it works fine... but, if i run it on a python program, it shows:

sh: teqc: command not found

the code i've been using on python is:

os.system('teqc -tr d input >output')

I tried using

subprocess.Popen('teqc -tr d input >output', shell=True, executable="/bin/bash")

but the only result was to change the error message to

/bin/bash: teqc: command not found

Any help would be really appreciated :)

PD I forgot to specify, the operating system is Fedora 21

Answer 1

我建议创建一个指向程序的符号链接。

ln -s /path/to/teqc /usr/bin/teqc

Answer 2

I think the problem is that the environment variable PATH is not the same when you run the command in the code using subprocess.

1. One solution would be to have a soft link in as suggested in the previous answer

2. Other thing you can do is to have your code set the environment before you execute your command using subprocess the os module comes has a os.environ dictionary which can be used to append the path using something like this

    import os import subprocess os.environ['PATH'] += ":/path/to/teqc" subprocess.Popen(['teqc -tr d input'],stdout=subprocess.PIPE,stderr=subprocess.PIPE,shell=True)