title: In Python what is a global statement?
body: <p>What is a <strong>global statement</strong>? And how is it used?  I have read <a href="http://docs.python.org/3/reference/simple_stmts.html#the-global-statement" rel="noreferrer">Python's official definition</a>;<br>
  however, it doesn't make a lot of sense to me.</p>