x = 10
print(id(x))
x = 20
print(id(x))

1646651456
1646651616


x = 10.1
print(id(x))
x = 20.1
print(id(x))

21905056
21902576

x = ‘xxq‘
print(id(x))
x = ‘zsy‘
print(id(x))

59860800
59862464

# l = [‘aaa‘,‘bbb‘,‘ccc‘]
# print(id(l))
# l = [‘xxx‘,‘yyy‘,‘zzz‘]
# print(id(l))

l = [‘aaa‘,‘bbb‘,‘ccc‘]
print(id(l))
l[0] = ‘AAA‘
# print(l)
print(id(l))

dic = {‘k1‘:111,"k2":222}
print(id(dic))
dic[‘k1‘] = 333
print(id(dic))

定义：｛｝内用逗号隔开多个 key : value，其中 value可以是任意类型，但是 key必须是不可变类型