lazy_init.py

"""
How many times we create a python class and in the init method we just write:

self.name1 = name1
self.name2 = name2
.....
for all arguments.....

How boring!!!!

Your task here is to implement a metaclass that let this instantiation be done automatically. But let's see an example:

class Person(metaclass=LazyInit):
  def __init__(self, name, age): pass
When we create a Person object like:

a_person = Person('John', 25)
The expected behavior will be:

print(a_person.name) # this will print John
print(a_person.age)  # this will print 25
Obviously the number of arguments might be different from class to class.

Don't worry about **kwargs you will never be given keyword arguments in this kata!!!

A little hint: a decorator could help you out doing the job!!!

Good luck lazy folks.....
"""
import inspect


class LazyInit(type):
    @classmethod
    def lazy_init(mcs, init):
        def wrapper(*args):
            param_names = inspect.getfullargspec(init).args
            self = args[0]
            for i in range(1, len(param_names)):
                setattr(self, param_names[i], args[i])

        return wrapper

    def __new__(mcs, class_name, bases, attrs):
        _class = type(class_name, bases, attrs)
        setattr(_class, '__init__', LazyInit.lazy_init(attrs['__init__']))
        return _class