Python Multiclipboard

# !/user/bin/env python
# mcb.pyw - save and loads pieces of text to the clipboard
# Usage: py.exe mcb.pyw save <keyword> - Save clipboard to keyword
#        py.exe mcb.pyw <keyword> - Loads keyword to clipboard
#        py.exe mcb.pyw list - Load all keyword to clipboard

import shelve, pyperclip, sys

def main():
    with shelve.open('mcb') as mcbShelf:

        # Save clipboard content
        if len(sys.argv) == 3 and sys.argv[1].lower() == 'save':
            mcbShelf[sys.argv[2]] = pyperclip.paste()
        elif len(sys.argv) == 2:

            #List keywords and load content
            if sys.argv[1].lower() == 'list':
                pyperclip.copy(str(list(mcbShelf.keys())))
                print(str(list(mcbShelf.keys())))
            elif sys.argv[1] in mcbShelf:

                pyperclip.copy(mcbShelf[sys.argv[1]])

if __name__ == '__main__':
    main()