Dataframe MultiLabelBinarizer（）正在拟合列，但未对其进行转换'；s值

这是我的数据帧“concat_data”

我正在应用MultiLabelBinarizer（）作为

它的产量是

lb = MultiLabelBinarizer()
lb.fit_transform(concat_data['batsmen'])

这是正确的，但当我检查concat_data.head（）时，它会再次给出未编码的数据

array([[0, 0, 0, ..., 0, 0, 0],
   [0, 0, 0, ..., 0, 0, 1],
   [0, 0, 0, ..., 0, 0, 0],
   ...,
   [0, 0, 0, ..., 0, 0, 0],
   [0, 0, 0, ..., 0, 0, 0],
   [0, 0, 0, ..., 0, 0, 0]])

有人能帮我解释一下为什么MultiLabelBinarizer（）不在“击球手”专栏上工作吗

它给出以下输出

lb.classes_

 match_id   innings         batsmen                                               bowlers
335982        1     [BB McCullum, DJ Hussey, Mohammad Hafeez, RT P...   [AA Noffke, CL White, JH Kallis, P Kumar, SB J...   67.0    Kolkata Knight Riders   Royal Challengers Bangalore         M Chinnaswamy Stadium
              2     [AA Noffke, B Akhil, CL White, JH Kallis, MV B...   [AB Agarkar, AB Dinda, I Sharma, LR Shukla, SC...   28.0    Royal Challengers Bangalore Kolkata Knight Riders           M Chinnaswamy Stadium
335989        1     [JDP Oram, MEK Hussey, ML Hayden, MS Dhoni, PA...   [A Nehra, AM Nayar, DJ Bravo, DS Kulkarni, Har...   60.0    Chennai Super Kings Mumbai Indians                          MA Chidambaram Stadium
              2     [A Nehra, AM Nayar, DJ Bravo, Harbhajan Singh,...   [JDP Oram, Joginder Sharma, M Muralitharan, MS...   54.0    Mumbai Indians  Chennai Super Kings                         MA Chidambaram Stadium

lb.classes_

array(['A Ashish Reddy', 'A Chandila', 'A Chopra', 'A Choudhary',
   'A Dananjaya', 'A Flintoff', 'A Kumble', 'A Mishra', 'A Mithun',
   'A Mukund', 'A Nehra', 'A Nel', 'A Nortje', 'A Singh', 'A Symonds',
   'A Uniyal', 'AA Chavan', 'AA Jhunjhunwala', 'AA Noffke',
   'AB Agarkar', 'AB Barath', 'AB Dinda', 'AB McDonald',
   'AB de Villiers', 'AC Blizzard', 'AC Gilchrist', 'AC Voges',
   'AD Hales', 'AD Mascarenhas',....