Thank you for your answers, Barry. Eli already answered me most of my
questions.
20.04.13 22:18, Barry Warsaw написав(ла):
On Apr 13, 2013, at 11:31 AM, Serhiy Storchaka wrote:
The str and repr of the enumeration class also provides useful information::
>>> print(Colors)
<Colors {red: 1, green: 2, blue: 3}>
>>> print(repr(Colors))
<Colors {red: 1, green: 2, blue: 3}>
Does the enumeration's repr() use str() or repr() for the enumeration values?
No, enumeration values have different reprs and strs.
Yes, values can have different reprs and strs (but ints haven't). What
of them uses repr of an enumeration item? I.e. what is str(Noises):
'<Noises {dog: bark}>' or '<Noises {dog: "bark"}>'?
class Noises(Enum)
dog = 'bark'
flufl.enum uses str(), but is it intentional? If yes, than it should be
specified in the PEP.
But if the value *is* important, enumerations can have arbitrary values.
Should enumeration values be hashable?
At least they should be comparable ("Iteration is defined as the sorted order
of the item values").
Given my previous responses, these questions should be already answered.
Eli and you have missed my first question. Should enumeration values be
hashable? If yes (flufl.enum requires hashability), then this should be
specified in the PEP. If no, then how you implements __getitem__? You
can use binary search (but values can be noncomparable) or linear search
which is not efficient.
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