New submission from Efanzh <efa...@gmail.com>:
The `headers` argument of the `__init__` method of `urllib.request.Request`
class uses `{}` as default value, which is mutable. It is not a good idea.
----------
components: Library (Lib)
messages: 355750
nosy: EFanZh
priority: normal
pull_requests: 16537
severity: normal
status: open
title: `urllib.request.Request` uses mutable value as default value
type: enhancement
versions: Python 3.9
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue38654>
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