In the sentence:<br><br><blockquote style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;" class="gmail_quote">“Private” instance variables that cannot be accessed except from inside 
an
object, don’t exist in Python.</blockquote><div><br>The comma is extraneous and should be removed.<br><br><a href="http://docs.python.org/tutorial/classes.html#private-variables">http://docs.python.org/tutorial/classes.html#private-variables</a><br>
<br>Thanks,<br>- Charles <br></div>