From https://docs.python.org/3/library/multiprocessing.html#multiprocessing.Value

    Note that lock is a keyword-only argument.

But the signature of Value (in Lib/multiprocessing/context.py)

    def Value(self, typecode_or_type, *args, lock=True):

and (in Lib/multiprocessing/sharedctypes.py)

    def Value(typecode_or_type, *args, lock=True, ctx=None):

I'd suggest to remove that part of the documentation in 3.4+. We can also make it a keyword-only argument in Python 3.6. That will make the API more similar with https://docs.python.org/3/library/multiprocessing.html#multiprocessing.Array