df replace values in column code example
Example 1: replace column values pandas
df['column'] = df['column'].str.replace(',','-')
df
Example 2: replace value of dataframe with another column
df['col1'] = np.where(df['col1'] == 0, df['col2'], df['col1'])
df['col1'] = np.where(df['col1'] == 0, df['col3'], df['col1'])