Notebook now runs out of the box on Colab

[sakshamio]

Addresses 1/4th of #387

[anupamamurthi]

Hi @sakshamio Wondering, were you able to successfully run the notebook?

I had a few issues

1. The notebook references common_utils.py but it is inside the examples package and not part of AIF360 library and python is unable to find a pointer to it at runtime.

In order to fix this, I would recommend moving common_utils into AIF360 itself - so that the module will be built as part of the library.

2. Even after fixing the above, the notebook fails as it is unable to locate "adult dataset"
   IOError: [Errno 2] No such file or directory: '/usr/local/lib/python3.10/dist-packages/aif360/datasets/../data/raw/adult/adult.data'
   To use this class, please download the following files:

   https://archive.ics.uci.edu/ml/machine-learning-databases/adult/adult.data
   https://archive.ics.uci.edu/ml/machine-learning-databases/adult/adult.test
   https://archive.ics.uci.edu/ml/machine-learning-databases/adult/adult.names

and place them, as-is, in the folder:

/usr/local/lib/python3.10/dist-packages/aif360/data/raw/adult

My recommendation will be to do two things

1. add a !wget (or use requests) and download the files as part of the notebook
2. you will need to override "load_preproc_data_compas" function so that it can optionally take a file directory as input. Right now, it simply takes "adult" as input and the path is hardcoded.

Let me know if all this makes sense.

[anupamamurthi]

Requesting a few changes.