Question

I’m trying to create a function:

filter(delete,lst) 

When someone inputs:

filter(1,[1,2,1]) 

returns [2]

What I have come up with was to use the list.remove function but it only deletes the first instance of delete.

def filter(delete, lst):

"""

Removes the value or string of delete from the list lst

"""

   list(lst)

   lst.remove(delete)

   print lst

My result:

filter(1,[1,2,1])

returns [2,1]

Answer 1

Try with list comprehensions:

def filt(delete, lst):
    return [x for x in lst if x != delete]

Or alternatively, with the built-in filter function:

def filt(delete, lst):
    return filter(lambda x: x != delete, lst)

And it’s better not to use the name filter for your function, since that’s the same name as the built-in function used above