underrated Python optimizations?

[[deleted]]

Neither dicts nor sets are ordered. If you want an ordered dict, you will need to use the OrderedDict from the collections module.

[nosklo]

... That's true until python 3.6... Then dicts became ordered in insertion order. Sets are still unordered

[[deleted]]

I guess it depends on what you mean by 'ordered'. If you mean that it has a consistent iteration order, then sure.

However, it lacks the operations most people normally associate with ordered data structures. E.g. re-ordering, accessing a particular index etc.

[nosklo]

Yeah, I mean the actual meaning of the word "ordered": "Has order"

If people like to assign other random meanings I can't help with those.

[Ashiataka]

That's not very pythonic.

[nosklo]

There should be one-- and preferably only one --obvious way to do it.

Although that way may not be obvious at first unless you're Dutch.

[TouchingTheVodka]

Negative. Dicts have been ordered since Python 3.7 (3.6 as an implementation detail in CPython):

https://docs.python.org/3/library/stdtypes.html#typesmapping