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Showing content from https://cloud.google.com/python/docs/reference/bigframes/1.33.0/bigframes.pandas.StringDtype below:

Class StringDtype (1.33.0) | Python client library

Class StringDtype (1.33.0)

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StringDtype(storage=None)

Extension dtype for string data.

Warning: StringDtype is considered experimental. The implementation and parts of the API may change without warning. Parameter Name Description storage {"python", "pyarrow", "pyarrow_numpy"}, optional .. attribute:: None :noindex: .. method:: None :noindex: .. rubric:: Examples >>> pd.StringDtype() string[python] >>> pd.StringDtype(storage="pyarrow") string[pyarrow]

If not given, the value of pd.options.mode.string_storage.

Properties 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.

type

The scalar type for the array, e.g. int

It's expected ExtensionArray[item] returns an instance of ExtensionDtype.type for scalar item, assuming that value is valid (not NA). NA values do not need to be instances of type.

Methods __from_arrow__
__from_arrow__(array: pyarrow.Array | pyarrow.ChunkedArray) -> BaseStringArray

Construct StringArray from pyarrow Array/ChunkedArray.

construct_array_type
construct_array_type() -> type_t[BaseStringArray]

Return the array type associated with this dtype.

construct_from_string
construct_from_string(string) -> Self

Construct a StringDtype from a string.

Parameter Name Description string str

The type of the name. The storage type will be taking from string. Valid options and their storage types are ========================== ============================================== string result storage ========================== ============================================== 'string' pd.options.mode.string_storage, default python 'string[python]' python 'string[pyarrow]' pyarrow ========================== ==============================================

Exceptions Type Description TypeError If the string is not a valid option.

Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.

Last updated 2025-08-12 UTC.

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