bug: string search can find \n, but can NEVER find \r

[xuancong84]

BPO	38503
Nosy	@methane

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2019-10-17.08:29:47.444>
created_at = <Date 2019-10-17.08:22:02.548>
labels = ['type-bug', 'invalid', '3.9']
title = 'bug: string search can find \\n, but can NEVER find \\r'
updated_at = <Date 2019-10-17.08:29:47.435>
user = 'https://bugs.python.org/xuancong84'

bugs.python.org fields:

activity = <Date 2019-10-17.08:29:47.435>
actor = 'methane'
assignee = 'none'
closed = True
closed_date = <Date 2019-10-17.08:29:47.444>
closer = 'methane'
components = []
creation = <Date 2019-10-17.08:22:02.548>
creator = 'xuancong84'
dependencies = []
files = []
hgrepos = []
issue_num = 38503
keywords = []
message_count = 2.0
messages = ['354834', '354835']
nosy_count = 2.0
nosy_names = ['methane', 'xuancong84']
pr_nums = []
priority = 'normal'
resolution = 'not a bug'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue38503'
versions = ['Python 3.9']

[xuancong84]

If I load a file which contains "\r" and "\n", I can find "\n", but not "\r". This behaviour is inconsistent in Python 3, but consistent in Python 2.

>>> open('./3cjkxdnw/accessibilityLog/1570181896323.csv', 'rb').read().count(b'\r')
88
>>> open('./3cjkxdnw/accessibilityLog/1570181896323.csv').read().count('\r')
0
>>> type(open('./3cjkxdnw/accessibilityLog/1570181896323.csv').read())
<class 'str'>
>>> type('\r')
<class 'str'>

Thanks!

[methane]

It is "universal newline".
See
https://docs.python.org/3/library/functions.html#open
and
https://docs.python.org/3/glossary.html#term-universal-newlines