<div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><span style="font-family:arial">On Mon, Jun 9, 2014 at 10:34 AM, Roy Smith </span><span dir="ltr" style="font-family:arial"><<a href="mailto:roy@panix.com" target="_blank">roy@panix.com</a>></span><span style="font-family:arial"> wrote:</span><br>
</div><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">We noticed recently that:<br>

<br>
>>> None in 'foo'<br>
<br>
raises (at least in Python 2.7)<br>
<br>
TypeError: 'in <string>' requires string as left operand, not NoneType<br>
<br>
This is surprising.<br><br></blockquote><div><span style="font-family:arial,helvetica,sans-serif">It's the same in 3.4, and I agree that it's surprising, at least to me<div class="gmail_default" style="font-family:arial,helvetica,sans-serif;display:inline">
​. I don't know the story or implementation behind it, so I'll leave that to others.​</div></span> </div></div><br></div></div>