python for 【id > is > ==】

id()  #查看内存地址name = ‘alex‘name1 = ‘alex‘print(id(name))   #31302632print(id(name1))  #31302632

is #查看是不是一个  通过内存地址

print(name == name1)

== 查看等号两边的值

def func():    # pass   #代码块1    name = ‘alex‘    print(id(name))

def func1():    # pass   #代码块2    name = ‘alex‘    print(id(name))

func()func1()

多个代码块中是可以使用小数池

代码块中 有个问题  就是重复使用

a = 100b = 100print(a is b)

数字-5 ~ 256

字符串 乘法总数长度不能超过20个,0和1除外

不能有特殊字符

a = ‘@‘*2b = ‘@‘*2print(a is b)

a = ‘[email protected]‘b = ‘[email protected]‘print(a is b)

原文地址：https://www.cnblogs.com/q240756200/p/9898206.html