define 'in' operator on lists

[Aaron Bingham]

Phil Frost wrote:

>On Mon, Oct 11, 2004 at 11:53:36AM +0200, ..:: sjf ::.. wrote:
>  
>
>>Hi all,
>>
>>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. By way of example:
>>
>>L = [1, 2, 3, 4, 5, 6, 7]
>>_list = [3, 4, 5]
>>
>>if L2 in L0:
>>	return True
>>else:
>>	return False
>>
>>How to do that?
>>    
>>
>
>You might find that the 'sets' module does what you need.
>  
>
The OP said he cares about order, so sets will certainly *not* do what 
he wants.  I suggest looking up string matching algorithms.  This is 
effectively what has been asked for but for strings of numbers instead 
of strings of characters.

Aaron