Abstract Class for data loading

[cversteeg]

It would be helpful to provide an abstract class that will guide people to fit data into the PyalData format. A few abstract methods with well defined I/O that the user has to implement will make using the toolbox much easier.

Thanks!

[bagibence]

Thanks for the suggestion! Could you maybe elaborate what that would look like? What are typical problems that might come up? (Please forgive my ignorance, I've never collected data.)

Since the data is just a pandas.DataFrame, all the constructors here should work.

@mattperich @raeedcho could you maybe describe what the Matlab version does?

[raeedcho]

It's a bit hard to describe, but the code for loading things is here (with the main script being convertDataToTD and the meat of the setup in initSignalStruct): https://github.com/mattperich/TrialData/tree/master/DataProcessing

The main idea is to pass in handles to functions that match an input-output spec, along with parameters for those functions. The documentation in there should cover how the system works, at least broadly.