Using Python's list index() method on a list of tuples or objects?

Question

Python\'s list type has an index() method that takes one parameter and returns the index of the first item in the list matching the parameter. For instance:

Answer 1

No body suggest lambdas?

Y try this and works. I come to this post searching answer. I don't found that I like, but I feel a insingth :P

    l #[['rana', 1, 1], ['pato', 1, 1], ['perro', 1, 1]]

    map(lambda x:x[0], l).index("pato") #1 

Edit to add examples:

   l=[['rana', 1, 1], ['pato', 2, 1], ['perro', 1, 1], ['pato', 2, 2], ['pato', 2, 2]]

extract all items by condition: filter(lambda x:x[0]=="pato", l) #[['pato', 2, 1], ['pato', 2, 2], ['pato', 2, 2]]

extract all items by condition with index:

    >>> filter(lambda x:x[1][0]=="pato", enumerate(l))
    [(1, ['pato', 2, 1]), (3, ['pato', 2, 2]), (4, ['pato', 2, 2])]
    >>> map(lambda x:x[1],_)
    [['pato', 2, 1], ['pato', 2, 2], ['pato', 2, 2]]

Note:_ variable only works in interactive interpreter y normal text file _ need explicti assign, ie _=filter(lambda x:x[1][0]=="pato", enumerate(l))