system: Linux mars.sprixweb.com 3.10.0-1160.119.1.el7.x86_64 #1 SMP Tue Jun 4 14:43:51 UTC 2024 x86_64

cmd: 

"""Compatibility helpers for the different Python versions."""

import sys

PY34 = sys.version_info >= (3, 4)
PY35 = sys.version_info >= (3, 5)
PY352 = sys.version_info >= (3, 5, 2)


def flatten_list_bytes(list_of_data):
    """Concatenate a sequence of bytes-like objects."""
    if not PY34:
        # On Python 3.3 and older, bytes.join() doesn't handle
        # memoryview.
        list_of_data = (
            bytes(data) if isinstance(data, memoryview) else data
            for data in list_of_data)
    return b''.join(list_of_data)