Are nested try/except blocks in python a good programming practice?

Question

I\'m writing my own container, which needs to give access to a dictionary inside by attribute calls. The typical use of the container would be like this:

dic         


        

Answer 1

Your first example is perfectly fine. Even the official Python docs recommend this style known as EAFP.

Personally, I prefer to avoid nesting when it's not necessary:

def __getattribute__(self, item):
    try:
        return object.__getattribute__(item)
    except AttributeError:
        pass  # fallback to dict
    try:
        return self.dict[item]
    except KeyError:
        raise AttributeError("The object doesn't have such attribute") from None

PS. has_key() has been deprecated for a long time in Python 2. Use item in self.dict instead.