[issue35918] multiprocessing's SyncManager.dict.has_key() method is broken

[Giampaolo Rodola']

New submission from Giampaolo Rodola' <g.rodola at gmail.com>:

Related to BPO-35917:

$ ./python 
Python 3.8.0a1+ (heads/master:cd90f6a369, Feb  6 2019, 17:16:10) 
[GCC 7.3.0] on linux
>>> import multiprocessing.managers
>>> m = multiprocessing.managers.SyncManager()
>>> m.start()
>>> d = m.dict()
>>> 'has_key' in dir(d)
True
>>> d.has_key(1)
Traceback (most recent call last):
  File "/home/giampaolo/cpython/Lib/multiprocessing/managers.py", line 271, in serve_client
    fallback_func = self.fallback_mapping[methodname]
KeyError: 'has_key'

----------
messages: 334959
nosy: davin, giampaolo.rodola, jnoller, pitrou, sbt
priority: normal
severity: normal
stage: needs patch
status: open
title: multiprocessing's SyncManager.dict.has_key() method is broken
versions: Python 3.6, Python 3.7, Python 3.8

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue35918>
_______________________________________