python + 运行带变量的系统命令

Question

我需要从 python 运行系统命令

我有 python - 版本 - Python 2.4.3

我尝试以下操作，在这个例子中 ls -ltr | grep 八月

#!/usr/bin/python


import commands


Month = "Aug"
status,output = commands.getstatusoutput(" ls -ltr | grep Month "  )
print output

如何在命令中插入月份变量？

所以 grep 会这样做

  | grep Aug

我也试试这个

status,output = commands.getstatusoutput( " ls -ltr | grep {} ".format(Month) )

但我得到以下错误

Traceback (most recent call last):
   File "./stamm.py", line 14, in ?
    status,output = commands.getstatusoutput( " ls -ltr | grep {}     ".format(Month) )
AttributeError: 'str' object has no attribute 'format'

Answer 1

import commands


Month = "Aug"
status,output = commands.getstatusoutput(" ls -ltr | grep '" + Month + "'")
print output

或者其他一些可能性是:

status,output = commands.getstatusoutput("ls -ltr | grep '%s'" % Month)

或

status,output = commands.getstatusoutput(" ls -ltr | grep \"" + Month + "\"")