polars.Series.arr.count_matches#

Series.arr.count_matches(element: IntoExpr) → Series[source]#

Count how often the value produced by element occurs.

Parameters:
element

An expression that produces a single value

Examples

>>> s = pl.Series("a", [[1, 2, 3], [2, 2, 2]], dtype=pl.Array(pl.Int64, 3))
>>> s.arr.count_matches(2)
shape: (2,)
Series: 'a' [u32]
[
    1
    3
]