If one of the Node as a NULL/None value as a name then it's removed.
For example, if you have a node call country with possible value: None, 'CA','USA')
Only 'CA' And 'USA' will be shown

We need to fix that

Any tree is required to run the code but is not automatically installed.

Data formating

• handle nested index dataframes: test what happens with current version. Then either raise an exception or handle in some way.
• handle missing x axis by setting to the index automatically.
• support different types of aggregations (for now only sum is supported)
• support ratio calculations. The user could provide a dict like: {'name': 'ccr', 'num': 'nb_completed', 'denom': 'nb_startes'}.

Data viz

• Add different graph types: Bar, Area, Proportion
• adaptable plot size
• support scroll down
• support scroll sideways
• infer number of columns when missing (for now this argument is required from the user)
• Nicer titles

Code

• more tests, especially for warnings and exception handeling

I think there is a problem with the recursion that make the package slow.
Will need to look into it.

@KevinCharette