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df.column.fillna(0,inplace=True)
Trained Tuna
df.column.fillna(0,inplace=True)df['DataFrame Column'] = df['DataFrame Column'].fillna(0)
#Python
#Col 1 = where you want the values replaced
#Col 2 = where you want to take the values from
df["Col 1"].fillna(df["Col 2"], inplace=True)