I'm collecting instances using the following code:
instances = 
self.value = 5
def do_something(self, a):
self.value = self.value * a
self.hand1 = Hand()
self.hand2 = Hand()
foo = Foo()
for hand in Hand.instances:
print "how do I print the instance name?"
If you mean how to get
hand1 from the instance you assigned to
self.hand1, the answer is that you can't. When you do
self.hand1 = Hand(), you tell the Foo object it has a Hand, but the Hand object has no knowledge that it has been assigned to a Foo. You could do this:
h = Hand() self.bob = h self.larry = h
Now what is the "name" of that Hand supposed to be? You assigned the same hand to both "bob" and "larry", so there's no way it can have a single unique name.
If you want to have a name for each hand, you need to tell the hand what name you want to give it. You would have to modify your Hand code to allow you to pass a name to the constructor, then create the Hand with
You can of course give the hands "names" by assigning attributes on them:
self.hand1 = Hand() self.hand1.name = "hand 1"
. . . but these names are not special or "automatic" in any way.
The bottom line is that if you want something to have a name, you need to decide how to handle that name. You need write your own code that gives it its name, and your own code that retrieves its name.