Question

 def merge(l1,l2):
 i=0;
 while((l1[i]!=none)||(l2[i]!=none)):

SyntaxError: invalid syntax
being a newbie i can’t figure out whats wrong with the abouve code.

Answer 1

Replace || with or, make None upper-case (and lose the semi-colon):

def merge(l1, l2):
  i = 0
  while l1[i] != None or l2[i] != None:
    pass

(As you can see, the parentheses were also redundant.)

Furthermore, != None can be changed to is not None:

while l1[i] is not None or l2[i] is not None:

_{(Thanks to @SilentGhost for pointing that out.)}