"""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)