# futval_graph3.py
from graphics import *
def drawBar(window, year, height):
# Draw a bar in window starting at year with given height
bar = Rectangle(Point(year, 0), Point(year+1, height))
bar.setFill("green")
bar.setWidth(2)
bar.draw(window)
def main():
# Introduction
print("This program plots the growth of a 10-year investment.")
# Get principal and interest rate
principal = float(input("Enter the initial principal: "))
apr = float(input("Enter the annualized interest rate: "))
# Create a graphics window with labels on left edge
win = GraphWin("Investment Growth Chart", 320, 240)
win.setBackground("white")
win.setCoords(-1.75,-200, 11.5, 10400)
Text(Point(-1, 0), ' 0.0K').draw(win)
Text(Point(-1, 2500), ' 2.5K').draw(win)
Text(Point(-1, 5000), ' 5.0K').draw(win)
Text(Point(-1, 7500), ' 7.5k').draw(win)
Text(Point(-1, 10000), '10.0K').draw(win)
drawBar(win, 0, principal)
for year in range(1, 11):
principal = principal * (1 + apr)
drawBar(win, year, principal)
input("Press to quit.")
win.close()
main()