From: Павел

main.py

In [1]: class LazyInit:
   ...:     def __new__(cls, **kwargs):
   ...:         instance = super().__new__(cls)
   ...:         for t in instance.__init__.__code__.co_varnames[1:]:
   ...:             setattr(instance, t, kwargs[t])
   ...:         return instance
   ...:

In [2]: class Foo(LazyInit):
   ...:     def __init__(self, name):
   ...:         pass
   ...:

In [3]: obj = Foo(name="John")

In [4]: obj.name
Out[4]: 'John'