df.apply(lambda code example
Example 1: pandas apply function to column
df['a'] = df['a'].apply(lambda x: x + 1)
Example 2: use apply with lambda pandas
df.apply(lambda x: func(x['col1'],x['col2']),axis=1)
df['a'] = df['a'].apply(lambda x: x + 1)
df.apply(lambda x: func(x['col1'],x['col2']),axis=1)