How to copy a Python class instance if deepcopy() does not work?

Question

I would like to make a copy of a class instance in python. I tried copy.deepcopy but I get the error message:

RuntimeError: Only Variables created explicitly by the user (graph leaves) support the deepcopy protocol at the moment

So suppose I have something like:

class C(object):     def __init__(self,a,b, **kwargs):         self.a=a         self.b=b         for x, v in kwargs.items():             setattr(self, x, v)  c = C(4,5,'r'=2) c.a = 11 del c.b 

And now I want to make an identical deep copy of c, is there an easy way?

Answer 1

Yes you can make a copy of class instance using deepcopy:

from copy import deepcopy  c = C(4,5,'r'=2) d = deepcopy(c) 

This creates the copy of class instance 'c' in 'd' .