如何在python中运行多行bash命令? [英] How to run multi-line bash commands inside python?

问题描述

我想在python程序中运行以下linux bash 命令行.

I want to run the following lines of linux bash commands inside a python program.

tail /var/log/omxlog | stdbuf -o0 grep player_new | while read i
do
    Values=$(omxd S | awk -F/ '{print $NF}')
    x1="${Values}"
    x7="${x1##*_}"
    x8="${x7%.*}"
    echo ${x8}
done

我知道对于单行命令，我们可以使用以下语法:

I know that for a single-line command, we can use the following syntax:

subprocess.call(['my','command'])

但是，如果多行中有多个命令，我该如何使用 subprocess.call ！?

But, how can I use subprocess.call if there are several commands in multiple lines !?

推荐答案

这是我认为 与您的 bash 相同的纯python解决方案:

Here is a pure python solution that I think does the same as your bash:

logname = '/var/log/omxlog'
with open(logname, 'rb') as f:
    # not sure why you only want the last 10 lines, but here you go
    lines = f.readlines()[-10:]

for line in lines:
    if 'player_new' in line:
        omxd = os.popen('omxd S').read()
        after_ = omxd[line.rfind('_')+1:]
        before_dot = after_[:after_.rfind('.')]
        print(before_dot)

这篇关于如何在python中运行多行bash命令?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！