[issue33075] typing.NamedTuple does not deduce Optional[] from using None as default field value

[Ivan Levkivskyi]

Ivan Levkivskyi <levkivskyi at gmail.com> added the comment:

This is actually an intended behaviour. Moreover, the implicit optionality of arguments that default to `None` is deprecated and will be removed in one of the future versions. (Note that since typing module is still provisional, this will likely happen without any additional notice.)

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<https://bugs.python.org/issue33075>
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