Question

eg.

l1 = [a,b,c,d]
l2 = [e,b,f,g]

A method that would return true when it sees that b is in both l1 and l2, and in position [1] in both lists. Preferably something that I can use in a for loop so that I can compare all the items in the list.

Many thanks 🙂

Answer 1

Try this code:

if 'b' in l1 and 'b' in l2: # Separated both statements to prevent ValueErrors
    if l1.index('b') == l2.index('b'): 
        print 'b is in both lists and same position!'

Unlike Volatility’s code, the length in either list doesn’t matter.

The index() function gets the position of an element in a string. For example, if there was:

>>> mylist = ['hai', 'hello', 'hey']
>>> print mylist.index('hello')
1