参考：https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.values.html

作用：返回DataFrame的numpy.ndarray。只有DataFrame中的值将被返回，轴标签将被删除。

import pandas as pd

d1 = [[3,"negative",2],[4,"negative",6],[11,"positive",0],[12,"positive",2]]
df1 = pd.DataFrame(d1, columns=["xuhao","result","value"])

print(df1,"\n")
print(df1.dtypes,"\n")
print(df1.values,"\n")
print(type(df1.values))

输出结果

   xuhao    result  value
0      3  negative      2
1      4  negative      6
2     11  positive      0
3     12  positive      2

xuhao      int64
result    object
value      int64
dtype: object

[[3 'negative' 2]
 [4 'negative' 6]
 [11 'positive' 0]
 [12 'positive' 2]]

<class 'numpy.ndarray'>