Python 3.11: “Zero cost” exception handling

Re:Python 3.11: “Zero cost” exception handling by mywittyname on Wednesday October 06, 2021 @10:54AM (#28773889)

If you don't care about a key existing, then this works.

    do_something(dict_.get("key", None))

I use that a lot for data parsing. Passing the exception is not very clean IMHO. I stick to d[key] nomenclature when I need assurance that all the keys are present in the dictionary, and .get(key,None) when I don't.

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Re:Python 3.11: “Zero cost” exception handling by stevesimmons on Wednesday October 06, 2021 @11:05AM (#28774018)

.get("key") is enough, as the default is already None.

And if you care about the default value being a particular type, when there may also be None in the input stream, do something like:

x.get("key") or []

str(x.get("key") or "") # Guarantee strings and avoid "None"!

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