how to replace one column with another in pandas code example

Example 1: replace column values pandas

df['column'] = df['column'].str.replace(',','-')
df

Example 2: replace values of pandas column

df.loc[df['column'] == 'column_value', 'column'] = 'new_column_value'

Example 3: replace 3 column with another column pandas

df['B'] = df1['E']