[pandas] DataFrame

import pandas as pd
import numpy as np

#create DataFrame
df = pd.DataFrame({'team': ['A', 'A', 'A', 'B', 'B'],
                   'position': ['Guard', 'Guard', np.nan, 'Guard', 'Forward'],
                   'points': [22, 28, 14, 13, 19]})

#view DataFrame
print(df)

  team position  points
0    A    Guard      22
1    A    Guard      28
2    A      NaN      14
3    B    Guard      13
4    B  Forward      19

https://www.statology.org/cannot-mask-with-non-boolean-array-containing-na-nan-values/

How to Fix: ValueError: Cannot mask with non-boolean array containing NA / NaN values - Statology