@staticmethod<EOL><INDENT>def _file_not_empty(tmpfile):<DEDENT>
if os.path.exists(tmpfile):<EOL><INDENT>return os.stat(tmpfile).st_size != <NUM_LIT:0><EOL><DEDENT>else:<EOL><INDENT>return False<EOL><DEDENT>
Returns True if file exists and it is not empty
to check if it is time to read container ID from cidfile
:param tmpfile: str, path to file
:return: bool, True if container id is written to the file