Pandas: Series - count() function

Last update on September 15 2022 12:58:05 (UTC/GMT +8 hours)

Count null observations in Pandas series

The count() function is used to get number of non-NA/null observations in the Series.

Syntax:

Series.count(self, level=None)

Parameters:

Name	Description	Type/Default Value	Required / Optional
level	If the axis is a MultiIndex (hierarchical), count along a particular level, collapsing into a smaller Series.	int or level name Default Value: None	Required

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

Example:

Python-Pandas Code:

import numpy as np
import pandas as pd
s = pd.Series([0.0, 2.0, np.nan])
s.count()

Output:

Previous: Compute correlation
Next: Compute covariance with Pandas Series