sklearn.preprocessing

1、对数据分类编码

from sklearn.preprocessing import LabelEncoder
le = LabelEncoder()
df_user3['user_id']=le.fit_transform(list(df_user3['user_id']))

le.classes_查看编码对应的user_id
生成对应表

d = pd.Series(le.classes_)
print(d)
d.to_csv('D:/huashuData/dianhui/dianhui_user_code.csv')

2、对分类特征进行二进制（0，1）编码

图片.png

from sklearn.preprocessing import MultiLabelBinarizer
mlb=MultiLabelBinarizer()
mo = mo.join(pd.DataFrame(mlb.fit_transform(mo.pop('genres')),
                          columns=mlb.classes_,
                          index=mo.index))

代码后效果.png