Get the MD5 checksum of a file from a container

def _get_md5(name, path):
    '''
    Get the MD5 checksum of a file from a container
    '''
    output = run_stdout(name,
                        'md5sum {0}'.format(pipes.quote(path)),
                        ignore_retcode=True)
    try:
        return output.split()[0]
    except IndexError:
        # Destination file does not exist or could not be accessed
        return None