Supporting __add__ in Dict

[Jean-Daniel]

A common pattern in the Kubernetes generator is to create and populate arrays using the += operator on Dict.

item.root.volumeMounts += [value]

It works because the addict Dict implementation override __add__ to return the passed value if the Dict is empty (and raise an error otherwise).

    def __add__(self, other):
        if not self.keys():
            return other
        else:
            self_type = type(self).__name__
            other_type = type(other).__name__
            msg = "unsupported operand type(s) for +: '{}' and '{}'"
            raise TypeError(msg.format(self_type, other_type))

Which means this previous snippet will :

• on first call, create a Dict because volumeMounts is not defined, and immediately replace this dict by [value].
• on subsequent calls, append [value] to the array created on first call.

Should this package support this too ?

[ramaro]

I think that's a great idea as it removes the need to check if it exists, etc...