polars.Series.null_count
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Подсчитать количество null-значений в этой Series.
Примеры
>>> s = pl.Series([1, None, None]) >>> s.null_count() 2
Series.null_count() → int
© 2020 Ritchie Vink
© 2022 Polars contributors
Licensed under the MIT License.
https://docs.pola.rs/api/python/stable/reference/series/api/polars.Series.null_count.html
