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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