python脚本中的awk命令

see

https://www.cnpython.com/qa/221588

key point:

run(‘docker ps -a | grep {} | awk "{print $1}"‘.format(container_name))
KeyError: ‘print $1‘

solution: 通过用{}包围来转义{}
so it should be:

run(‘docker ps -a | grep {} | awk "{{print $1}}"‘.format(container_name))