[issue43901] Lazy-create an empty annotations dict in all unannotated user classes and modules

[Kubilay Kocak]

Change by Kubilay Kocak <koobs.freebsd at gmail.com>:


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components: +Interpreter Core -FreeBSD
nosy:  -koobs

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue43901>
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