1、= 的赋值方式会带有关联性
import numpy as np
a = np.arange(4)
b = a
c = a
d = b
a[0] = 6
print(a)
print(b)
# 依次打印bcd发现值都发生了改变
d[1:3] = [22, 33]
# 更改d的值,相应的abc也会改变
2、copy( ) 的赋值方式没有关联性
import numpy as np
a = np.arange(4)
b = a.copy()
# deepcopy
print(a)
print(b)
a[3] = 6
print(a)
print(b)