Python Turtle Rectangle Using 2 Corner Coordinates - python-2.7

Question

beginning CS student here. I am trying to have python 2.7 draw a rectangle using a function that only has the turtle object, the upper left corner coordinates, and the lower right corner coordinates as arguments. I know there are simpler way of drawing a rectangle but I am trying to do it only using corner coordinates.
After running my current code I get the following:
TypeError: can't multiply sequence by non-int of type 'float'
I know this is probably something simple but I am having trouble figuring out what I'm doing wrong so any help would be appreciated.
My code is as follows:
from turtlegraphics import Turtle
def drawLine(t1,x1,y1,x2,y2):
t1.setWidth(1)
t1.setColor(0,0,0)
t1.up()
t1.move(x1,y1)
t1.down()
t1.move(x2,y2)
def rectangleSimple(t2,upperLeftPoint,lowerRightPoint):
t2.setWidth(1)
t2.setColor(0,0,0)
t2.up()
t2.move(upperLeftPoint)
t2.down()
t2.setDirection(270)
t2.move(lowerRightPoint[2])
t2.setDirection(0)
t2.move(lowerRightPoint)
t2.setDirection(90)
t2.move(upperLeftPoint[2])
t2.setDirection(180)
t2.move(upperLeftPoint)
def main():
t1 = Turtle()
x1 = 0
y1 = 0
x2 = 50
y2 = 0
drawLine(t1,x1,y1,x2,y2)
t2 = Turtle()
upperLeftPoint = (-100,50)
lowerRightPoint = (100,-50)
rectangleSimple(t2,upperLeftPoint,lowerRightPoint)
main()

Answer 1

I use the turtle module, not turtlegraphics but my guess is these two lines are at issue:
t2.move(lowerRightPoint[2])
t2.move(upperLeftPoint[2])
Your *Point variables are tuples with two values, X & Y, at indexes 0 & 1 but you're accessing the non-existent third value at index 2. There are many different ways to implement what you're trying to do, here's one using the turtle module that comes with Python:
from turtle import Turtle
X, Y = range(2)
def drawLine(t, x1, y1, x2, y2):
t.up()
t.width(1)
t.pencolor(1, 0, 0) # red
t.goto(x1, y1)
t.down()
t.goto(x2, y2)
def rectangleSimple(t, upperLeftPoint, lowerRightPoint):
t.up()
t.width(1)
t.pencolor(0, 1, 0) # green
t.goto(upperLeftPoint)
t.setheading(0) # East
t.down()
t.goto(lowerRightPoint[X], upperLeftPoint[Y])
t.right(90)
t.goto(lowerRightPoint)
t.right(90)
t.goto(upperLeftPoint[X], lowerRightPoint[Y])
t.right(90)
t.goto(upperLeftPoint)
if __name__ == "__main__":
from turtle import done
t1 = Turtle()
drawLine(t1, 0, 0, 50, 0)
t2 = Turtle()
upperLeftPoint = (-100, 50)
lowerRightPoint = (100, -50)
rectangleSimple(t2, upperLeftPoint, lowerRightPoint)
done()