title: Addition of two binaries numbers in Python
body: <p>Hey guys i have a trouble when i want to add two binaries numbers in Python, i mean i can enter a chain of character in a form of a string but i don't know how to select a specific value in the chain. Here is my code: </p>
  
  <pre><code>chaina = input('Enter your first binary number')
  chainb = input('Enter your second binary number')
  liste = str()
  r = 0
  for i in range [-1,chaina]:
     t = 0
     t = chaina() + chainb() + r
  if t == 2 :
      r = 1
      liste = str(t) + liste            
  elif t == 0 or t == 1:
       r = 0
       liste = str(t) + liste
  </code></pre>