shell脚本怎么调用python的return值

Question

我在python下写了一个比较字符串的python函数如下：

import time

if name == "__main__":
fo = open("steps.txt", "r+")
steps = fo.read()
print "读取的step是 : ", steps
fo.close()

T0 = 0
X = 600
ticks = time.time()
T = (long(ticks) - T0) / X
step = str(T).upper()
while len(step) < 16:
    step = "0" + step

def compare():
    if steps == step:
        return 1
    else:
        return 0

compare()

然后我想在shell脚本里调用这个compare.py获取函数return的值
代码如下：
#!/bin/bash
var1=python compare.py
echo $var1
$var1并没有输出我想看到的return值1或0，而是执行了整个py文件
我只想接受这个return值有什么好的方法吗

Answer 1

https://stackoverflow.com/questions/11900828/store-return-value-of-a-python-script-in-a-bash-script