아미(아름다운미소)

df['week'] = df['date'].apply(lambda d_: gfn_to_char(gfn_to_date(d_, '%Y-%m-%d'), '%Y%w'))

import pandas as pddef my_function(row, param1, param2): # 함수 내부 로직 return resultdf = pd.DataFrame(...)df['new_column'] = df.apply(my_function, axis=1, args=(value1, value2))