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pyarrow.compute.index — Apache Arrow v21.0.0

pyarrow.compute.index(data, value, start=None, end=None, *, memory_pool=None)[source]#

Find the index of the first occurrence of a given value.

Parameters:

dataArray-like

valueScalar-like object

The value to search for.

startint, optional

endint, optional

memory_poolMemoryPool, optional

If not passed, will allocate memory from the default memory pool.

Returns:

indexint

the index, or -1 if not found

Examples

>>> import pyarrow as pa
>>> import pyarrow.compute as pc
>>> arr = pa.array(["Lorem", "ipsum", "dolor", "sit", "Lorem", "ipsum"])
>>> pc.index(arr, "ipsum")
<pyarrow.Int64Scalar: 1>
>>> pc.index(arr, "ipsum", start=2)
<pyarrow.Int64Scalar: 5>
>>> pc.index(arr, "amet")
<pyarrow.Int64Scalar: -1>

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