我想在python程序中运行以下几行linux bash
命令。
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 ${x8}
done
我知道对于单行命令,我们可以使用以下语法:
subprocess.call(['my','command'])
但是,如果多行中有多个命令,我怎么能使用subprocess.call
?
答案 0 :(得分:6)
引用https://mail.python.org/pipermail/tutor/2013-January/093474.html:
使用subprocess.check_output(shell_command,shell = True)
import subprocess
cmd = '''
tail /var/log/omxlog | stdbuf -o0 grep player_new | while read i
do
Values=$(omxd S | awk -F/ '{print $NF}')
x1="${Values}"
x7="${x1##*_}"
x8="${x7%.*}"
echo ${x8}
done
'''
subprocess.check_output(cmd, shell=True)
我已经尝试了其他一些例子并且有效。
答案 1 :(得分:1)
这是一个纯粹的python解决方案,我认为与您的bash
完全相同:
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)