NameError: name 'GraphWin' is not defined

[goshiluvarchie]

Python 2.7 (r27:82525, Jul 4 2010, 09:01:59) [MSC v.1500 32 bit (Intel)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> ================================ RESTART ================================
>>>
Python 2.7 (r27:82525, Jul 4 2010, 09:01:59) [MSC v.1500 32 bit (Intel)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> ================================ RESTART ================================
>>>

Traceback (most recent call last):
File "E:\Python\g_convert.py", line 5, in <module>
from graphics import *
File "E:\Python\graphics.py", line 8, in <module>
win = GraphWin("My Robot", 1000,1000)
NameError: name 'GraphWin' is not defined
>>>

It keeps saying GraphWin is not defined, but I don't understand why. I already typed in from graphics import *

I'm very new to using Python.

[goshiluvarchie]

from graphics import *

def main():
    win = GraphWin ("Celsius Converter", 400, 300)
    win.setCoords(0.0, 0.0, 3.0, 4.0)
    
    # Draw the interface
    Text(Point(1,3), "   Celsius Temperature:").draw(win)
    Text(Point(1,1), "Fahrenheit Temperature:").draw(win)
    input = Entry(Point(2,3), 5)
    input.setText("0.0")
    input.draw(win)
    output = Text(Point(2,1),"")
    output.draw(win)
    button = Text(Point(1.5,2.0),"Convert It")
    button.draw(win)
    Rectangle(Point(1,1.5), Point(2,2.5)).draw(win)

    # wait for a mouse click
    win.getMouse()

    # convert input
    celsius = eval(input.getText())
    fahrenheit = 9.0/5.0 * celsius + 32

    # display output and change button
    output.setText("%0.1f" % fahrenheit)
    button.setText("Quit")

    # wait for click and then quit
    win.getMouse()
    win.close()
    
main()