Python - pickle version

pickleversion.py

# usage:
# >>> import pickleversion
# >>> with open('entry.pickle', 'rb') as f:
# ...     v = pickleversion.protocol_version(f)
# >>> v

import pickletools

def protocol_version(file_object):
    maxproto = -1
    for opcode, arg, pos in pickletools.genops(file_object):
        maxproto = max(maxproto, opcode.proto)
    return maxproto