Method __iadd__

pattern/db/__init__.py:2099–2100

(self, value)

    def __add__(self, value):
        raise TypeError, "unsupported operand type(s) for +: 'Datasheet.columns[x]' and '%s'" % value.__class__.__name__
    def __iadd__(self, value):
        self.append(value); return self
    def __contains__(self, value):
        for v in self:
            if v == value: return True