How to add a map as a class field?
<p>I want to add a dictionary that maps an object to a list of objects as an instance variable to a class. What is the idiomatic way to do it in Python? Here's how I've done it:</p>

<pre><code>class MyClass:
    def __init__(self):
        self.myDict = { None : [None] }  
</code></pre>
