sched.cancel() doesn't distinguish equal events and can break order #63469

assignee = None
closed_at = <Date 2021-11-22.10:43:52.847>
created_at = <Date 2013-10-16.08:47:32.204>
labels = ['easy', 'type-bug', '3.10', 'docs']
title = "sched.cancel() doesn't distinguish equal events and can break order"
updated_at = <Date 2021-11-22.10:43:52.846>
user = 'https://github.com/serhiy-storchaka'

activity = <Date 2021-11-22.10:43:52.846>
actor = 'iritkatriel'
assignee = 'docs@python'
closed = True
closed_date = <Date 2021-11-22.10:43:52.847>
closer = 'iritkatriel'
components = ['Documentation']
creation = <Date 2013-10-16.08:47:32.204>
creator = 'serhiy.storchaka'
dependencies = []
files = ['32142']
hgrepos = []
issue_num = 19270
keywords = ['patch', 'easy']
message_count = 24.0
messages = ['200040', '200048', '200698', '200708', '200711', '200714', '200715', '200717', '200719', '200788', '200798', '200799', '200828', '200830', '200831', '200832', '244346', '327404', '371895', '372139', '372142', '376985', '378930', '398628']
nosy_count = 9.0
nosy_names = ['rhettinger', 'pitrou', 'giampaolo.rodola', 'docs@python', 'serhiy.storchaka', 'josh.r', 'bar.harel', 'wocket', 'andrei.avk']
pr_nums = ['22729']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue19270'
versions = ['Python 3.10']