#
```python
>>> name="alex"
>>> name1=name
>>> name1
'alex'
>>> id(name),id(name1)
(1961720693360, 1961720693360)
>>> name-"heigun"
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: unsupported operand type(s) for -: 'str' and 'str'
>>> name="heigun"
>>> id(name),id(name1)
(1961720694832, 1961720693360)
