<p>I have a function that takes another function as a parameter. If the function is a member of a class, I need to find the name of that class. E.g.</p>

<pre><code>def analyser(testFunc):
    print testFunc.__name__, 'belongs to the class, ...
</code></pre>

<p>I thought  </p>

<pre><code>testFunc.__class__ 
</code></pre>

<p>would solve my problems, but that just tells me that testFunc is a function.</p>

I'm not a Python expert, but does this work?
```
```
testFunc.__self__.__class__
```
```
It seems to work for bound methods, but in your case, you may be using an unbound method, in which case this may work better:
```
```
testFunc.__objclass__
```
```
Here's the test I used:
```
```
Python 2.5.2 (r252:60911, Jul 31 2008, 17:31:22) 
[GCC 4.2.3 (Ubuntu 4.2.3-2ubuntu7)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import hashlib
>>> hd = hashlib.md5().hexdigest
>>> hd
<built-in method hexdigest of _hashlib.HASH object at 0x7f9492d96960>
>>> hd.__self__.__class__
<type '_hashlib.HASH'>
>>> hd2 = hd.__self__.__class__.hexdigest
>>> hd2
<method 'hexdigest' of '_hashlib.HASH' objects>
>>> hd2.__objclass__
<type '_hashlib.HASH'>
```
```
Oh yes, another thing:
```
```
>>> hd.im_class
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'builtin_function_or_method' object has no attribute 'im_class'
>>> hd2.im_class
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'method_descriptor' object has no attribute 'im_class'
```
```
So if you want something bulletproof, it should handle
```
__objclass__
```
and
```
__self__
```
too. But your mileage may vary.