How to run multi-line bash commands inside python?

Question

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
d         


        

Answer 1

quote https://mail.python.org/pipermail/tutor/2013-January/093474.html:
use subprocess.check_output(shell_command, shell=True)

import subprocess
cmd = '''
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    
'''
subprocess.check_output(cmd, shell=True)

I have try some other examples and it works.

Answer 2

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)