.append()和.extend()的区别

import numpy as np
a=[]
b=[1,2,3,4]
c=[5,6,7,8]
a.append(b)
a.append(c)
print(a)
a=np.stack(a)
print(a)

a=[]
b=[1,2,3,4]
c=[5,6,7,8]
# a.append(b)
# a.append(c)
# print(a)
# a=np.stack(a)
# print(a)
a.extend(b)
a.extend(c)
print(a)

a.append()可以说是把整体放到a中
a.extend()只是把内容放到a中