pyarrow.compute.map_lookup

pyarrow.compute.map_lookup(container, /, query_key, occurrence, *, options=None, memory_pool=None)

Find the items corresponding to a given key in a Map.

For a given query key (passed via MapLookupOptions), extract either the FIRST, LAST or ALL items from a Map that have matching keys.

Parameters:

containerArray-like or scalar-like

Argument to compute function.

query_keyScalar

The key to search for.

occurrencestr

The occurrence(s) to return from the Map Accepted values are “first”, “last”, or “all”.

optionspyarrow.compute.MapLookupOptions, optional

Alternative way of passing options.

memory_poolpyarrow.MemoryPool, optional

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

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