msgpack/msgpack-python — pull request #82 by zhurs (2013-12-15 16:50:16+00:00)
Title: Support of bytearray in msgpack/fallback.py

Pure-python implementation of unpack returns bytearrays instead of strings, if packed data is bytearray

In [1]: import msgpack
In [2]: msgpack.unpackb(bytearray(b'\xa3foo'))
Out[2]: bytearray(b'foo')

Patch fixes this case