Create a repr of a property based class quickly
    Args:
        obj      -- instance of class
        *attrs   -- list of attrs to add to the representation
        **kwargs -- Extra arguments to add that are not captured as attributes

    Returns: A string representing the class

def rep(obj, *attrs, **kwargs):
    """Create a repr of a property based class quickly
    Args:
        obj      -- instance of class
        *attrs   -- list of attrs to add to the representation
        **kwargs -- Extra arguments to add that are not captured as attributes

    Returns: A string representing the class
    """
    s = obj.__class__.__name__
    args = chain(((attr, getattr(obj, attr)) for attr in attrs), kwargs.items())
    s += '(%s)' % ','.join('{}={!r}'.format(k, v) for k, v in args)
    return s