PEP 597: fileinput uses locale encoding

[methane]

BPO	43712
Nosy	@methane
PRs	bpo-43712 : fileinput: Add encoding parameter #25272

^{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 2021-04-14.05:13:22.022>
created_at = <Date 2021-04-03.11:40:57.640>
labels = ['library', '3.10']
title = 'PEP 597: fileinput uses locale encoding'
updated_at = <Date 2021-04-14.05:13:22.021>
user = 'https://github.com/methane'

bugs.python.org fields:

activity = <Date 2021-04-14.05:13:22.021>
actor = 'methane'
assignee = 'none'
closed = True
closed_date = <Date 2021-04-14.05:13:22.022>
closer = 'methane'
components = ['Library (Lib)']
creation = <Date 2021-04-03.11:40:57.640>
creator = 'methane'
dependencies = []
files = []
hgrepos = []
issue_num = 43712
keywords = ['patch']
message_count = 2.0
messages = ['390121', '391032']
nosy_count = 1.0
nosy_names = ['methane']
pr_nums = ['25272']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue43712'
versions = ['Python 3.10']

[methane]

fileinput.input() and fileinput.FileInput() don't have encoding parameter.

User can specify encoding by openhook=hook_encoded("utf-8"). But we can not utilize PEP-597, and encoding="utf-8" is more user friendly.

Additionally, hook_compressed doesn't have the encoding parameter. User need to use binary mode or locale encoding.

[methane]

New changeset 333d10c by Inada Naoki in branch 'master':
bpo-43712 : fileinput: Add encoding parameter (GH-25272)
333d10c