Nick Dumas wrote:
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[1,2] in [1,2,3] checks to see if the list [1,2] is an item in [1,2,3].
Because the list [1,2,3] only contains the integers 1,2,3, the code
returns a False. Try "[1,2] in [[1,2],[2,3]]"
The inconsistency goes deeper than that. For instance, the type of a
value returned by the indexing operation:
Indexing a string returns a string (of length 1 of course),
while indexing a list does not (necessarily) return a list.
Conclusion: They are different types supporting different operations.
Given all the obvious differences (mutability, sorting and other
methods, types of individual elements), I'd say there are more
differences than similarities, even though, as sequences, they both
support a small subset of similar operations.
Gary Herron
David C. Ullrich wrote:
Luckily I tried it before saying no, that's
not how "in" works:
'ab' in 'abc'
True
[1,2] in [1,2,3]
False
Is there a reason for the inconsistency? I would
have thought "in" would check for elements of a
sequence, regardless of what sort of sequence it was...
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