Method create_init

Solutions/7_4/structure.py:25–35

Create an __init__ method from _fields

(cls)

    @classmethod
    def create_init(cls):
        '''
        Create an __init__ method from _fields
        '''
        args = ','.join(cls._fields)
        code = f'def __init__(self, {args}):\n'
        for name in cls._fields:
            code += f'    self.{name} = {name}\n'
        locs = { }
        exec(code, locs)
        cls.__init__ = locs['__init__']

    @classmethod
    def __init_subclass__(cls):