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« Zdd Zddd ZddZ ddZddZd dZy ) Ú PandasColumnaö
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A column object, with only the methods and properties required by the
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interchange protocol defined.
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A column can contain one or more chunks. Each chunk can contain up to three
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buffers - a data buffer, a mask buffer (depending on null representation),
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and an offsets buffer (if variable-size binary; e.g., variable-length
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strings).
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Note: this Column object can only be produced by ``__dataframe__``, so
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fbllÔ +Üðð !..Ð)ð *2ð2óð ô &¤"§)¡)Ô,Ü%Ð(8¼¸f» ¸ÐFVÐ&WÓXÐ Xð Ø%Õó c ó. | j j S )z2
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Size of the column, in elements.
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If the dtype is categorical, there are two options:
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|
|
Raises TypeError if the dtype is not categorical
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|
Content of returned dict:
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- "is_ordered" : bool, whether the ordering of dictionary indices is
|
semantically meaningful.
|
- "is_dictionary" : bool, whether a dictionary-style mapping of
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categorical values to other objects exists
|
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r zCdescribe_categorical only works on a column with categorical dtype!T)Ú
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r Ú USE_BYTEMASKr ÚarrayÚ _pa_arrayÚchunksÚbuffersÚ NON_NULLABLEÚ USE_BITMASKÚ_NULL_DESCRIPTIONÚKeyErrorr* )r. Úcolumn_null_dtypeÚ
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Number of null elements. Should always be known.
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Return a dictionary containing the underlying buffers.
|
The returned dictionary has the following contents:
|
- "data": a two-element tuple whose first element is a buffer
|
containing the data and whose second element is the data
|
buffer's associated dtype.
|
- "validity": a two-element tuple whose first element is a buffer
|
containing mask values indicating missing data and
|
whose second element is the mask value buffer's
|
associated dtype. None if the null representation is
|
not a bit or byte mask.
|
- "offsets": a two-element tuple whose first element is a buffer
|
containing the offset values for variable-size binary
|
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|
element is the offsets buffer's associated dtype. None
|
if the data buffer does not have an associated offsets
|
buffer.
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|
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|
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|
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|
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