pybean.py

"""TODO: A docstring"""


class Bean(type):
    def __init__(cls, name, bases, dct):
        def init(self, *args, **kwargs):
            for attr, arg in zip(cls._attrs, args):
                setattr(self, attr, arg)
            for name, value in kwargs.iteritems():
                setattr(self, name, value)
            undefined = []
            for attr in cls._attrs:
                try:
                    getattr(self, attr)
                except AttributeError:
                    undefined.append(attr)
            if undefined:
                print undefined
                raise ValueError('The following arguments are missing: {0}'
                                 .format(', '.join(undefined)))
        setattr(cls, '__init__', init)


class Point(object):
    __metaclass__ = Bean
    _attrs = ('x', 'y')

p = Point(2, 5)
print p