1 reply to this topic

[albertblank]

I started a few weeks ago with (actually learning) programming by installing python and numpy, chapter 4.1 was easy, but I got stuck on chapter 4.2, 'reading from the command line'

I know the command line is the 'input' from the command prompt/interactive shell, but I can't get my head around what you actually do with the code

import sys
C = float(sys.argv[1])

etc.

In fact, I'm not even sure how this is supposed to work at all for command line interface! How does the code work in practice?

I skipped the rest of chapter 4 and read most of chapter 5 without doing any exercises in those 2 chapters so far, but it didn't reference ch 4 at all (didn't look at the curve plotting stuff). How long until chapter 4 becomes relevant in the book? what's it important for?

thanks

[Flying Dutchman]

Perhaps with example you'll get a more clear picture; I have a tree script to which I can pass arguments; I can say which directory to list, or with no arguments it will list current directory, and I can even filter out (by extension or partial name match) files.