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pandas.api.extensions.ExtensionDtype.na_value

property ExtensionDtype.na_value

Default NA value to use for this type.

This is used in e.g. ExtensionArray.take. This should be the user-facing “boxed” version of the NA value, not the physical NA value for storage. e.g. for JSONArray, this is an empty dictionary.

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https://pandas.pydata.org/pandas-docs/version/1.3.4/reference/api/pandas.api.extensions.ExtensionDtype.na_value.html