>>> a = 'abcd'
>>> a
'abcd'
>>> b = 'abcd'
>>> b
'abcd'
>>> a == b
True
>>> a is b
True
>>> c = 'ab'
>>> c = c + 'cd'
>>> c
'abcd'
>>> a == c
True
>>> a is c
python 字符串不可变
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转载自blog.csdn.net/qq_36480179/article/details/82467821
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