BUG: Series.Count() miscounts NA values in ExtensionArrays · Issue #26835 · pandas-dev/pandas (original) (raw)

Code Sample, a copy-pastable example if possible

In [9]: import numpy as np ...: import pandas as np ...: from pandas.tests.extension.decimal.array import to_decimal ...: ser = pd.Series(to_decimal([1,2,3])) ...: ser[0]=np.nan ...: ser.count() 3