Python Class scope & lists
<p>I'm still fairly new to Python, and my OO experience comes from Java.  So I have some code I've written in Python that's acting very unusual to me, given the following code:</p>

<pre><code>class MyClass():
        mylist = []
        mynum = 0

        def __init__(self):
                # populate list with some value.
                self.mylist.append("Hey!")
                # increment mynum.

                self.mynum += 1

a = MyClass()

print a.mylist
print a.mynum

b = MyClass()

print b.mylist
print b.mynum
</code></pre>

<p>Running this results in the following output:</p>

<pre><code>['Hey!']
1
['Hey!', 'Hey!']
1
</code></pre>

<p>Clearly, I would expect the class variables to result in the same exact data, and the same exact output... What I can't seem to find anywhere is what makes a list different than say a string or number, why is the list referencing the same list from the first instantiation in subsequent ones? Clearly I'm probably misunderstanding some kind of scope mechanics or list creation mechanics..</p>
