This script transforms a CSV with historic price data from Yahoo! Finance into a CSV with retrospective day-to-day change absolute difference.
The script can be executed just as you would execute any other python script.
python main.py <file_to_transform> [from_date] [to_date]
The script generates a file named <file_to_transform>_converted.csv
The repository includes a few example origin CSV files to be transformed in the example-files directory.