title: Is the time complexity of string += "a" the same as string = string + "a"?
body: <p>In both statements, I am appending a character <code>&quot;a&quot;</code> to the string <code>s</code>:</p>
  <ol>
  <li><code>s += &quot;a&quot;</code></li>
  <li><code>s = s + &quot;a&quot;</code></li>
  </ol>
  <p>Which statement has the better time complexity in Python?</p>