How to create this variable?
<p>I would like to create a variable similar to a dictionary like that:</p>

<pre><code>parameters['Cell']['volume'] = 5    
parameters['Project']['winterTemp'] = 30
</code></pre>

<p>I have tried to do:</p>

<pre><code>parameters = dict()    
parameters['volume'] = 5
</code></pre>

<p>It works, but how can I create a "two dimensional" dictionary like the example where I could store the cell number?</p>