Run
import pandas as pd import numpy as np df = pd.DataFrame( [[np.nan, 72, 67], [23, 78, 62], [32, 74, np.nan], [np.nan, 54, 76]], columns=['a', 'b', 'c']) value = df.at[0, 'a'] #nan isNaN = np.isnan(value) print("Is value at df[0, 'a'] NaN :", isNaN) value = df.at[0, 'b'] #72 isNaN = np.isnan(value) print("Is value at df[0, 'b'] NaN :", isNaN)
Output