Why are attributes lost after copying a Pandas DataFrame

Question

Why is it not possible to pass attributes of an instance through a copy? I want to pass the name attribute to another dataframe.

import copy
df = pd         


        

Answer 1

This code is worked:

>>> class test():
...     @property
...     def name(self):
...         return self._name
...     @name.setter
...     def name(self, value):
...         self._name = value
...
>>>
>>> a = test()
>>> a.name = 'Test123'
>>> import copy
>>> a2 = copy.deepcopy(a)
>>> print(a2.name)
Test123

so I think that behavior is defined by pd.DataFrame

I found that pandas define the function __deepcopy__, but I cannot totally understand the reason.

pandas/core/indexes/base.py#L960