我創(chuàng)建了一個(gè)函數(shù)并在 for 循環(huán)中使用它，但收到TypeError 'DataFrame' object is not callabledef Freq(df, keyvar, *args):    Freq = pd.DataFrame({'Frequency': df.groupby([*args])[keyvar].count()}).reset_index()    Freq['Percent'] = (Freq['Frequency']/sum(Freq['Frequency'])*100).round(2)    Freq['Cumulative Frequency'] = Freq['Frequency'].cumsum()    Freq['Cumulative Percent'] = (Freq['Cumulative Frequency']/sum(Freq['Frequency'])*100).round(2)    return Freq我用它Freq()來：freq_var = ['A', 'B', 'C', 'D', 'E']for col in freq_var:    Freq = Freq(data, 'KEYS', f'{col}')    print(f'============ {col} frequency table ============\n{Freq}\n\n')---------------------------------------------------------------------------TypeError                                 Traceback (most recent call last)<ipython-input-30-2d4041b2961b> in <module>()      1 freq_var = ['A', 'B', 'C', 'D', 'E']      2 for col in freq_var:----> 3     Freq = Freq(data, 'KEYS', f'{col}')      4     print(f'============ {col} frequency table ============\n{Freq}\n\n')TypeError: 'DataFrame' object is not callable如果我不調(diào)用Freq()直接輸入就可以了，沒有錯(cuò)誤，輸出成功。for col in freq_var:    Freq = pd.DataFrame({'Frequency': data.groupby([col])['KEYS'].count()}).reset_index()    Freq['Percent'] = (Freq['Frequency']/sum(Freq['Frequency'])*100).round(2)    Freq['Cumulative Frequency'] = Freq['Frequency'].cumsum()    Freq['Cumulative Percent'] = (Freq['Cumulative Frequency']/sum(Freq['Frequency'])*100).round(2)     print(f'============ {col} frequency table ============\n{Freq}\n\n')   有人知道這個(gè)問題嗎？