I think this is a great idea, but I would not want to introduce a new keyword. How about<div><br></div><div><div><font class="Apple-style-span" face="&#39;courier new&#39;, monospace">    foo is in bar     = hasattr(foo,bar)</font></div>

<div><div><font class="Apple-style-span" face="&#39;courier new&#39;, monospace">    foo is not in bar = not hasattr(foo,bar)</font></div><div><br></div></div></div><div>But there are other common checks I do all the time that I would really like to have shortcuts for. Here are ways to do them without new keywords:</div>

<div><br></div><div><font class="Apple-style-span" face="&#39;courier new&#39;, monospace">    foo is class bar = isinstance(foo,bar)</font></div><div><font class="Apple-style-span" face="&#39;courier new&#39;, monospace">    foo is from bar  = issubclass(foo,bar)</font></div>

<div><font class="Apple-style-span" face="&#39;courier new&#39;, monospace">    foo is with bar  = type(foo) == type(bar)</font></div><div><div><br></div><div>Can we make an exception to the moratorium, just for today?</div>

<div><br>--- Bruce<br><a href="http://www.vroospeak.com">http://www.vroospeak.com</a><br>
<br><br><div class="gmail_quote">On Thu, Apr 1, 2010 at 8:15 AM, Robert Madole <span dir="ltr">&lt;<a href="mailto:robmadole@gmail.com">robmadole@gmail.com</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">

So I just wrote my 1-gazillionth &quot;if hasattr(&#39;method&#39;, my_object):&quot; and wanted badly to write this.<br>
<br>
        if &#39;method&#39; on my_object:<br>
<br>
I&#39;m not the most experienced Python user, but as far as I can tell hasattr is the preferred way of checking if a method exists.<br>
<br>
Please correct me if there is a better way, otherwise I&#39;d like to see what everyone thinks about an &quot;on&quot; statement being added to the Python language.<br>
<br>
Thanks,<br>
<br>
Rob Madole<br>
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</blockquote></div><br></div></div>