Not found in the documentation
elas tica
elasstiika at gmail.com
Wed Apr 28 15:10:23 EDT 2021
Le mercredi 28 avril 2021 à 17:36:32 UTC+2, Chris Angelico a écrit :
> > if a string or a range object is a container or not. For instance,
> > can we say that range(100) contains 42 ?
> Not by that definition of container.
Which definition? ;)
> some objects have references to other objects, and the high level
> concept that some objects support the "in" operator for containment
> checks. They are similar, in that many objects use "in" to check the
> exact same set that they refer to, but they are not the same (for
> instance, range(1, 10, 1000000) requires a reference to the "one
> million" integer, even though it is not actually part of the range).
The problem with range is different because we all know that a range object
doesn't hold (= contain) the int's (except the endpoints and the step)
we can iterate on, instead a range object computes on the fly the int's it holds.
On the contrary, the string "2021" holds the digits, even "2021"*10**6 does.
But this discussion is undecidable since the Python Language Reference
doesn't provide a decent definition of a container.
> What are you actually trying to prove here? What
> problem are you solving? Or is this just nitpicking for the sake of
> it?
I was only looking for basic definitions, unfortunately the official docs are not able to provide :
- what is the str value of an int? (we have to wait until Python 3.8.6 docs to get the response)
- what is a container ? what does mean "contains references" ? is a string a container or not and where the docs explains the answer?
- what is exactly a token? are "is not" or "not in " tokens?
> the language definition. CPython, for instance, is in process of
> completely rewriting its parser,
and what about rewriting and *redesigning* the docs? Is there even a discussion about this? Nobody complains?
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