Hello All,
I am new to Python and taking a course now. One of my exercises is to
create a traffic light using tkinter. The exercise also requires that I
create radio buttons that allow the user to click on the color and the
corresponding light will come on.
I followed some examples in my book to write the code but get some errors
that I don't understand . Code and error messages below
Thanks,
Tony
from tkinter import * # Import tkinter
class Trafficlight:
def __init__(self):
window = Tk() # Create a window
window.title("Traffic Light") # Set a title
# Add three radio buttons to frame1
frame1 = Frame(window) # Create and add a frame to window
frame1.pack()
self.v1 = IntVar()
self.v2 = IntVar()
rbRed = Radiobutton(frame1, text = "Red", bg = "red",
variable = self.v2,
value = 1,
command = self.processRadiobutton)
rbYellow = Radiobutton(frame1, text = "Yellow", bg = "yellow",
variable = self.v2, value = 2,
command = self.processRadiobutton)
rbGreen = Radiobutton(frame1, text = "Green", bg = "green",
variable = self.v2, value = 3,
command = self.processRadiobutton)
rbRed.grid(row = 10, column = 1)
rbYellow.grid(row = 10, column = 2)
rbGreen.grid(row = 10, column = 3)
# Add Radio Button process below once I figure that out
# Place canvas in the window
self.canvas = Canvas(window, width = 480, height = 480, bg =
"white")
self.canvas.pack()
# Display a rectangle
def displayRect(self):
self.canvas.create_rectangle(10, 10, 190, tages = "rect")
# Display a Oval for the top light
def displayOval(self):
self.canvas.create_oval(10, 10, 10, 10)
# Display an Oval for the middle light
def displayOval(self):
self.canvas.create_oval(20, 20, 20, 20)
# Display an Oval for the bottom light
def displayOval(self):
self.canvas.create_oval(30, 30, 30, 30)
# Create an event loop
Trafficlight()
Error messages
Python 3.3.0 (v3.3.0:bd8afb90ebf2, Sep 29 2012, 02:56:36)
[GCC 4.2.1 (Apple Inc. build 5577)] on darwin
Type "copyright", "credits" or "license()" for more information.
>>> ================================ RESTART ================================
>>>
Traceback (most recent call last):
File "/Users/anthonym/Downloads/pybook/Traffic Light Tony.py", line 57, in
<module>
Trafficlight()
File "/Users/anthonym/Downloads/pybook/Traffic Light Tony.py", line 16, in
__init__
command = self.processRadiobutton)
AttributeError: 'Trafficlight' object has no attribute 'processRadiobutton'
>>> ================================ RESTART ================================
>>>
Traceback (most recent call last):
File "/Users/anthonym/Downloads/pybook/Traffic Light Tony.py", line 57, in
<module>
Trafficlight()
File "/Users/anthonym/Downloads/pybook/Traffic Light Tony.py", line 16, in
__init__
command = self.processRadiobutton)
AttributeError: 'Trafficlight' object has no attribute 'processRadiobutton'
>>>
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