Random832 <random...@fastmail.com>:
> So can we discuss how a unified method to get a set of all valid
> subscripts (and/or subscript-value pairs) on an object would be a
> useful thing to have without getting bogged down in theoretical
> claptrap about the meaning of the mapping contract?
One could compose a table of correspondences:
-------------------------------------------
list (L) dict (D)
-------------------------------------------
L[key] = value D[key] = value
del L[key] (*) del L[key]
key >= 0 and key < len(L) key in D
range(len(L)) iter(D)
L.clear D.clear
L.copy D.copy
lambda key: L[key] D.get
lambda: enumerate(L) D.items
lambda: range(len(L)) D.keys
... ...
-------------------------------------------
(*) reassigns all keys
Marko
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