pandas.DataFrame.values

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)
#    xuhao    result  value
# 0      3  negative      2
# 1      4  negative      6
# 2     11  positive      0
# 3     12  positive      2
print(df1.dtypes)
# xuhao      int64
# result    object
# value      int64
# dtype: object
print(df1.values)
# [[3 'negative' 2]
#  [4 'negative' 6]
#  [11 'positive' 0]
#  [12 'positive' 2]]
print(type(df1.values))
# <class 'numpy.ndarray'>