title: s.replace string method, looping through a string
body: <p>I am attempting to write a method that replaces every occurrence of a letter after the first as a "*" instead of the letter.
  Examples: 
  "babble" yields "ba**le"
  "that" yields "tha*"</p>
  
  <p>My code seems to be having an issue with the replace function while looping and I can't quite figure out why.</p>
  
  <pre><code>def fix_start(s):
      if len(s) &lt; 2:
          s = "" 
      else:
          for i in s:
              if i == s[0]:
                  if s[0]:
                      continue
                  s.replace(s[i], "*")
                  i += i
      print(s)
  </code></pre>