import numpy as np

array=[1,2,3,4,5]
array+1#没定义成numpy.ndarray类型是不能直接操作的

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-2-bae0c13eab71> in <module>()
      1 array=[1,2,3,4,5]
----> 2array+1
 
TypeError: can only concatenate list (not "int") to list

array=np.array([1,2,3,4,5])
print(type(array))

<class 'numpy.ndarray'>

array2=array+1
array2

array([4, 5, 6, 7, 8])

array*array2

array([12, 20, 30, 42, 56])

array[0]

3

array.shape#数组大小

(5,)

np.array([[1,2,3],[4,5,6]])

array([[1, 2, 3],
       [4, 5, 6]])