"+=" causing syntax error in Python
<pre><code>n = 1
p = 4
print n += p
</code></pre>

<p>gives me:</p>

<blockquote>
  <p>File "p7.py", line 17</p>
  
  <p>print n += p</p>
  
  <p>SyntaxError: invalid syntax</p>
</blockquote>

<p>How can this problem be fixed?</p>
