OkCupid-Message-Downloader | simple Python script for downloading your sent | User Interface library

I am sure that this is a dumb thing I am doing or not doing. I hardly ever use python so I forget.

I am using python 2.7 because that is what the package was written in.

1. In a DOS command window I used the command pip install okcmd and it seemed to have worked, although I received the notice that pip is being deprecated.
2. I fired up idle. I got the python shell.
3. I typed import okcmd. No error messages, so I assumed it worked.
4. I typed okcmd. I didn't include any arguments so I was expecting some sort of error. Idle responded with . I interpreted that as a good sign.
5. I then typed okcmd -u a1 -p a2 -f 'a.txt'. I used my real username instead of a1 and real password instead of a2, but I get the same result if I use a1 and a2. I received SyntaxError: invalid syntax.

Here is a link to the package description: https://github.com/lehrblogger/OkCupid-Message-Downloader

What do I need to do to get the thing to run instead of give me a syntax error? I assume it is me not invoking it correctly rather than the code because no line number was indicated for the invalid syntax. If it is the code I don't need help debugging it - I'll bail on the whole thing.

Thanks