0. run_ppi.py is the main file.
1. Install all required libraries: tensorflow, numpy, sklearn, math, functools, operators, os, time, scipy, pandas, itertools, urllib, random, sys...
2. Check/change the paths in data_ppi.py, flags_ppi.py and run_ppi.py to make sure data can be accessed
3. Neural network structure can be modified in flags_ppi.py