| """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) |