On 9/24/2010 2:45 PM, Tim Chase wrote:
On 09/24/10 13:01, Ethan Furman wrote:
John Posner wrote:
Another "missing feature" candidate: sublist
>>> 'bc' in 'abcde'
True
>>> list('bc') in list('abcde')
False
I'm not aware of any idioms, but how about a simple function?
<snip>
Foldable into a one-line version if one's sick enough to use it:
<snip>
Looking at this a bit more, I can see why the *in* operator applies to
strings, but not to lists. Consider the ambiguity in this
"heterogeneous" list:
mylist = [0, 1, 2, 3, [a, b], 10, 11, 12, a, b, 13]
Should the expression *[a, b] in mylist* get a hit at offset 4, or at
slice [8:10]?
If you know that your lists will be homogeneous ("scalar" values only),
or if you're willing to program around the potential ambiguity, then
Ethan's function can easily be adapted into a __contains__() method of a
*list* subclass.
Tx,
John
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