Try importing Mapping from the new location first.
Try importing Mapping from the new location first.

While collections.Mapping was scheduled to be removed in Python 3.8, it was delayed to Python 3.9. On the other hand, it has been available as collections.abc.Mapping from 3.4 onward.

Keep the try/except for Python 2.7 (since it wasn't dropped yet.)

rshk/python-pcapng,rshk/python-pcapng