Question

I just have a question. how to use abstract functions without lambda?

say I have two list

a = [1,2,3,4,5]
b = [2,4,6]

if I want to print all the elements both appear in A and B,

with lambda:

def f():
  print reduce (list.__add__ , map (lambda x: filter (lambda y: x == y, b), a))

how to do it without lambda?

i mean i’m just using helper functions instead of lambda

Answer 1

How do you get the intersection of two sets? If you use the set data type, you can just use & for union:

print list(set(a) & set(b))