Help in python project: password locker

Question

cant understand the second step of project: password locker from chapeter -6 in the book Automate the boring stuff with python.

Answer 1

the print simply output the text, in this case explain how to use the program:
python, call for execute the file
pw.py, the name of the file
[account], optional argument that'll be putted in sys.argv [1]
copy account password, if you put an account name it'll copy the password on the clipboard
the print statement obviously only print text and does nothing

Answer 2

you add command line argument support, so when you execite your program, for ex:
python myfile.py
you can add arguments:
python myfile.py argument
in this case you can enter an account name and you'll get the password for that account so:
python myfile.py luggage
and you'll get 12345 copied to the clipboard(in the third step the book add codes for copy this to the clipboard, so for now it'll do nothing)

Answer 3

ok...please explain the print argument

if len(sys.argv) < 2:
print('Usage: python pw.py [account] - copy account password')

Answer 4

thank you