Dec-25-2019, 08:07 AM
Take a look at the following example:
import pandas as pd df = pd.DataFrame({"A": [1, pd.np.nan], "B": [pd.np.nan, 2]}) df.loc[df.A.isna(), "C"] = df.B[df.A.isna()] df.loc[df.B.isna(), "C"] = df.A[df.B.isna()]