The MimeTypes class cannot ignore global files per instance

[SebastianNoack]

BPO	24527

^{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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assignee = None
closed_at = None
created_at = <Date 2015-06-29.11:11:47.824>
labels = ['type-feature', 'library', '3.11']
title = 'The MimeTypes class cannot ignore global files per instance'
updated_at = <Date 2022-01-20.22:55:09.698>
user = 'https://bugs.python.org/SebastianNoack'

bugs.python.org fields:

activity = <Date 2022-01-20.22:55:09.698>
actor = 'iritkatriel'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2015-06-29.11:11:47.824>
creator = 'Sebastian Noack'
dependencies = []
files = []
hgrepos = []
issue_num = 24527
keywords = []
message_count = 1.0
messages = ['245930']
nosy_count = 2.0
nosy_names = ['Sebastian Noack', 'Wladimir Palant']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue24527'
versions = ['Python 3.11']

[SebastianNoack]

In order to prevent the mimetypes module from considering global files and registry entries, you have to call mimetypes.init([]). However, this will enforce that behavior globally, and only works if the module wasn't initialized yet.

There is also a similar argument in the mimetypes.MimeTypes() constructor, however the list of files passed there are considered additionally. But there is no way to prevent an individual MinmeTypes instance to consider global files.

Adding a "ignore_global_types" option would be trivial too add to the MimeTypes constructor, and would be extremely useful.