python and operator in if code example

Example 1: python if and

if foo == 'abc' and bar == 'bac' or zoo == '123':
  # do something

Example 2: if with && in python

def front_back(a, b):
  # +++your code here+++
  if len(a) % 2 == 0 && len(b) % 2 == 0:
    return a[:(len(a)/2)] + b[:(len(b)/2)] + a[(len(a)/2):] + b[(len(b)/2):] 
  else:
    #todo! Not yet done. :P
  return