pandas.Series.count

Return number of non-NA/null observations in the Series.

param level

int or level name, default None

If the axis is a MultiIndex (hierarchical), count along a particular level, collapsing into a smaller Series.

return

int or Series (if level specified) Number of non-null values in the Series.

Limitations

Parameter level is currently unsupported.

Examples

Counting non-NaN values in Series

import pandas as pd
import numpy as np
from numba import njit


@njit
def series_count():
    s = pd.Series([1, 2, np.nan])
    out_series = s.count()

    return out_series  # Expect the number of non-Nan values == '2'


print(series_count())

$ python ./series/series_count.py
2

See also

Series.value_counts

Return a Series containing counts of unique values.

Series.str.len

Count the length of each element in the Series.