[已解决]等号赋值

wp231957

>>> a=100
>>> b=100
>>> a is b
True
>>> a="A"
>>> b="A"
>>> a is b
True
>>> a=(2,3)
>>> b=(2,3)
>>> a is b
False
>>> a=[1,2]
>>> b=[1,2]
>>> a is b
False
>>> a={"1":1}
>>> b={"1":1}
>>> a is b
False
>>> a=100
>>> b=a
>>> b=200
>>> a
100
>>> a="abc"
>>> b=a
>>> b="456"
>>> a
'abc'
>>> a=[1]
>>> b=a
>>> b=[456]
>>> a
[1]
>>> a=100
>>> b=a
>>> a=200
>>> b
100
>>> a="abc"
>>> b=a
>>> a="456"
>>> b
'abc'
>>> a=[1]
>>> b=a
>>> a=[5]
>>> b
[1]
>>>