rustfolio-0.1.0 is not a library.
Rustfolio
Rustfolio is a program for monitoring your investment portfolio. It's main purpose is to show a summary of all your assets and their share in the entire portfolio. The portfolio data is stored in a .csv file, so it can be imported into any spreadsheet processor like Libre Office Calc or Microsoft Exel for more complicated processing and analisys.

Example usage
Show the portfolio "MyPortfolio"
--file flag can be omitted. In this case the program will promt to select the portfolio that exists.
Modify a portfolio
The program will promt you to provide data for each asset category in the portfolio and will save it in the specified file. If --file is omitted, it will promt to select a portfolio. If none exists, it will promt to create a new one.