pyarrow.ExtensionType

class pyarrow.ExtensionType(DataType storage_type, extension_name)

Bases: pyarrow.lib.BaseExtensionType

Concrete base class for Python-defined extension types.

Parameters

• storage_type (DataType) –

• extension_name (str) –

__init__()

Initialize an extension type instance.

This should be called at the end of the subclass’ __init__ method.

Methods

__init__	Initialize an extension type instance.
equals(self, other)	Return true if type is equivalent to passed value.
to_pandas_dtype(self)	Return the equivalent NumPy / Pandas dtype.
wrap_array(self, storage)	Wrap the given storage array as an extension array.

Attributes

bit_width
extension_name	The extension type name.
id
num_buffers	Number of data buffers required to construct Array type excluding children.
num_children	The number of child fields.
num_fields	The number of child fields.
storage_type	The underlying storage type.

bit_width

equals(self, other)

Return true if type is equivalent to passed value.

Parameters

other (DataType or string convertible to DataType) –

Returns

is_equal (bool)

extension_name

The extension type name.

id

num_buffers

Number of data buffers required to construct Array type excluding children.

num_children

The number of child fields.

num_fields

The number of child fields.

storage_type

The underlying storage type.

to_pandas_dtype(self)

Return the equivalent NumPy / Pandas dtype.

wrap_array(self, storage)

Wrap the given storage array as an extension array.

Parameters

storage (Array or ChunkedArray) –

Returns

array (Array or ChunkedArray) – Extension array wrapping the storage array

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