Length and direction cosines of lines

[tarikrr]

Good day,

First time posting, and new to python
I'm trying to get the user to input the number of lines he wants, then input the coordinates for the line ends for each line

say the user enters the number of lines: 10
then how can I prompt him to input the x y coordinates for each line end for each line (10 times for example)
then store those coordinates to do some operations on it like finding each line length and finding each line direction cosines?


thank you!