str.replace() TypeError exception message backward

[bland328]

BPO	43309

^{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 2021-02-23.23:49:51.041>
created_at = <Date 2021-02-23.23:42:25.369>
labels = ['type-bug', 'invalid', '3.9']
title = 'str.replace() TypeError exception message backward'
updated_at = <Date 2021-02-23.23:49:51.040>
user = 'https://bugs.python.org/bland328'

bugs.python.org fields:

activity = <Date 2021-02-23.23:49:51.040>
actor = 'bland328'
assignee = 'none'
closed = True
closed_date = <Date 2021-02-23.23:49:51.041>
closer = 'bland328'
components = []
creation = <Date 2021-02-23.23:42:25.369>
creator = 'bland328'
dependencies = []
files = []
hgrepos = []
issue_num = 43309
keywords = []
message_count = 2.0
messages = ['387593', '387594']
nosy_count = 1.0
nosy_names = ['bland328']
pr_nums = []
priority = 'normal'
resolution = 'not a bug'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue43309'
versions = ['Python 3.9']

[bland328]

Attempting to replace a character in a bytes string literal results in an exception saying that "a bytes-like object is required, not 'str'", when (unless I'm missing something) it should say the opposite.

To repro:

>>> x=b'abc'
>>> x.replace('a','z')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: a bytes-like object is required, not 'str'

[bland328]

Dumb misunderstanding on my part--didn't realize replace() would actually work on a bytes-type object, so *I* had it backwards.