第11课 s1 = 'hello world' s2 = 'hello world' s3 = s2
print(s1 == s2, s2 == s3) # True True
print(s1 is s2, s2 is s3) # False True
s1 is s2 会返回true s1 s2 s3三个对象引用同一个字符串池
第11课
s1 = 'hello world'
s2 = 'hello world'
s3 = s2
比较字符串的内容
print(s1 == s2, s2 == s3) # True True
比较字符串的内存地址
print(s1 is s2, s2 is s3) # False True
s1 is s2 会返回true
s1 s2 s3三个对象引用同一个字符串池