simple instantiations of python classes
<p>Can you please explain why 'hello world' isn't returned below? What do I need to modify for it to be expressed properly when called? Thanks.</p>

<pre><code>&gt;&gt;&gt; class MyClass:
...     i=12345
...     def f(self):
...         return 'hello world'
...     
&gt;&gt;&gt; x=MyClass()
&gt;&gt;&gt; x.i
12345
&gt;&gt;&gt; x.f
&lt;bound method MyClass.f of &lt;__main__.MyClass instance at 0x060100F8&gt;&gt;
</code></pre>
