urllib.request.Request.set_proxy doesn't (necessarily) replace type

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2018-09-15.17:17:31.863>
labels = ['3.8', 'library']
title = "urllib.request.Request.set_proxy doesn't (necessarily) replace type"
updated_at = <Date 2019-04-10.12:38:01.516>
user = 'https://github.com/tipabu'

bugs.python.org fields:

activity = <Date 2019-04-10.12:38:01.516>
actor = 'cheryl.sabella'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2018-09-15.17:17:31.863>
creator = 'tburke'
dependencies = []
files = []
hgrepos = []
issue_num = 34698
keywords = []
message_count = 1.0
messages = ['325449']
nosy_count = 2.0
nosy_names = ['orsenthil', 'tburke']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = None
url = 'https://bugs.python.org/issue34698'
versions = ['Python 3.8']