You can use the input()
function to prompt the user for input, and float
to convert the user input from a string to a float:
x1 = float(input("x1: "))
y1 = float(input("y1: "))
x2 = float(input("x2: "))
y2 = float(input("y2: "))
If you’re using python 2, use raw_input()
instead.