define 'in' operator on lists

..:: sjf ::.. somebody at unknown.org
Mon Oct 11 12:51:57 CEST 2004


pewnego dnia niejaki(a) Duncan Booth wstukal(a) byl(a) co nastepuje...:
> ..:: sjf ::.. wrote:
> 
> 
>>I want to define 'in' operator (or any "magic" function) on list which 
>>returns True value if all of list (i.e. _list) elements appears in other 
>>list (i.e. L) in the same order and False otherwise. 
> 
> 
> How about:
> 
> 
>>>>def containedinsequence(short, long):
> 
> 	ilong = iter(long)
> 	for s in short:
> 	    for l in ilong:
> 		if s==l:
> 		    break
> 	    else:
> 		return False # ran out of long list
> 	return True
> 
> 
>>>>L = [1, 2, 3, 4, 5, 6]
>>>>containedinsequence([3, 4, 6], L)
>

OK, this is nearly what I am expecting, but I want if
containedsequence([3, 4, 5], L) returns True, but
containedsequence([3, 4, 6], L) returns False
because that sequence not exist in longlist exactly


-- 
.:: sjf ::..
"Linux is like Wigwam. No gates, no windows... Apache inside ;-)"



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