Python - graphics - example

from graphics import *

x1 = 20
y1 = 30

x2 = 180
y2 = 165

w = GraphWin("Graphics Window", 400, 400)

line = Line(Point(x1, y1), Point(x2, y2))
line.draw(w)

dx = x2 - x1
dy = y2 - y1
#slope = dx/dy # if dy is zero then it gives ERROR
length = (dx**2 + dy**2)**0.5
print(length)

txt = Text(Point(200, 200), str(length))
txt.draw(w)

p = Point(50, 60)
p.getX()
p.getY()

w.getMouse() # wait on mouse click
w.close() # close window