Checking if class is derived of some other class

[Alexander Skwar]

On Mon, 22 Apr 2002 21:11:59 +0200, Alexander Skwar wrote:

> How can I check if myObject is either directly instantiated from class a
> or is if of a class which inherited from class a?

Okay, figured it out myself:

if issubclass(myObject, a):
	print "myObject has some connection to a"
else:
	print "no connection between myObject and a"

However, reading
http://www.python.org/doc/current/lib/built-in-funcs.html#l2h-33 , 
I would have thought that the appropriate method would have been
isinstance().  But the following prints "No":

class a:
	pass

class b(a):
	pass

class c(b):
	pass

myObject = c

if isinstance(myObject, c):
	print "yes"
else:
	print "No"

Why is that?

Alexander Skwar
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