[docs] [issue34538] Remove encouragement to author a base class for all Exception subclasses in a module

[Ammar Askar]

Ammar Askar <ammar at ammaraskar.com> added the comment:

For some empirical data, I went through some popular packages that follow this pattern and searched for usage of their base exception classes:

Requests: https://github.com/search?q=except+requests.RequestException&type=Code

PyYaml: https://github.com/search?q=except+yaml.YAMLError&type=Code

Jinja2: https://github.com/search?q=%22except+jinja2.TemplateError%22&type=Code

https://github.com/search?q=%22except+jinja2.exceptions.TemplateError%22&type=Code

https://github.com/search?q=%22except+TemplateError%22&type=Code

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nosy: +ammar2

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<https://bugs.python.org/issue34538>
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