是比较 id 但 id 在 -5 和 256 之间应该是相同的，为什么 x = 3 和 y = 5 不一样？
is compare id but id should be the same between -5 and 256, how come it's not if x = 3 and y = 5?
a = 10 # range -5 to 256
b = 10 # range -5 to 256
print(id(a))
print(id(b))
print(a is b)
# OK THAT'S FINE
但是
a = 10 # range -5 to 256
b = 10 # range -5 to 256
print(id(a))
print(id(b)) # same memory adress
print(a is b)
# That's working
c = 3 # range -5 to 256
d = 5 # range -5 to 256
print(id(c))
print(id(d))
print(c is d)
不同的内存地址O_o
错误，因为...该范围应该没问题！
看下图，你应该明白为什么了：
a is b 为真c is d 为假
-5 到 256 之间的数字
为什么：
e is f 为假
对于这个特殊范围之外的其他号码
a = 10 # range -5 to 256
b = 10 # range -5 to 256
print(id(a))
print(id(b))
print(a is b)
# OK THAT'S FINE
但是
a = 10 # range -5 to 256
b = 10 # range -5 to 256
print(id(a))
print(id(b)) # same memory adress
print(a is b)
# That's working
c = 3 # range -5 to 256
d = 5 # range -5 to 256
print(id(c))
print(id(d))
print(c is d)
不同的内存地址O_o 错误，因为...该范围应该没问题！
看下图，你应该明白为什么了：
a is b为真c is d为假
-5 到 256 之间的数字
为什么：
e is f为假
对于这个特殊范围之外的其他号码