Versions:
Darwin MacBook-Pro-de-Victor.local 16.3.0 Darwin Kernel Version 16.3.0: Thu Nov 17 20:23:58 PST 2016; root:xnu-3789.31.2~1/RELEASE_X86_64 x86_64
Python 3.6.0 (v3.6.0:41df79263a11, Dec 22 2016, 17:23:13) 
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin

import multiprocessing as mp

condition = mp.Condition()

with condition:
    condition.notify(2) #Docs show notify(n=1)
#TypeError: notify() takes 1 positional argument but 2 were given

#Replacing the call with condition.notify(2):
#TypeError: notify() got an unexpected keyword argument 'n'


# Docs show signature: def notify(self, n=1)
# But found this debugging:
 
# multiprocessing/synchronize.py
# line 211: class Condition(object):
# .....
# line 271:     def notify(self): #<-- ¿There is no n paramater?
# .....

Sorry for the typo, I meant:

#Replacing the call with condition.notify(n=2):
#TypeError: notify() got an unexpected keyword argument 'n'

Looks like, despite what the multiprocessing.Condition docs say (claiming it's an alias for threading.Condition), at least in Python 3.5, it's a completely separate animal from multiprocessing.synchronize, and the notify method on it doesn't take any parameters.

Seems like an obvious thing to fix; the parameter is defaulted anyway, so existing code should continue to work, and it makes multiprocessing swap in for threading more seamlessly.

New changeset 48350412b70c76fa51f488cfc736c80d59b5e8eb by Antoine Pitrou in branch 'master':
bpo-29293: multiprocessing.Condition.notify() lacks parameter `n` (#2480)
https://github.com/python/cpython/commit/48350412b70c76fa51f488cfc736c80d59b5e8eb

New changeset 8207c17486baece8ed0ac42d9f8d69ecec4ba7e4 by Victor Stinner in branch 'master':
Revert "bpo-30822: Fix testing of datetime module." (#2588)
https://github.com/python/cpython/commit/8207c17486baece8ed0ac42d9f8d69ecec4ba7e4