numpy基本操作（持续更新）

In [1]: import numpy as np

In [2]: import pandas as pd

In [3]: df = pd.DataFrame({'a': [1,2,3], 'b': [3,6,8]})

In [4]: array_0 = df.values

In [5]: array_0
Out[5]:
array([[1, 3],
       [2, 6],
       [3, 8]], dtype=int64)

In [6]: array_0.shape
Out[6]: (3, 2)

In [7]: array_0.max()
Out[7]: 8

In [8]: array_0.max(axis=0)
Out[8]: array([3, 8], dtype=int64)

In [9]: array_0.max(axis=1)
Out[9]: array([3, 6, 8], dtype=int64)

In [10]: np.array([[1,2,3],[0,1,4]]).all()
Out[10]: False

In [11]: np.array([[1,2,3],[0,1,4]]).any()
Out[11]: True

In [12]: np.array([1,2,3]).all()
Out[12]: True

In [13]: np.array([1,2,3]).any()
Out[13]: True