[Tutor] Traffic Light
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
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
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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Re: [Tutor] Traffic Light
Thanks again for the info Alan. I am still passing the button process until I can get my rectangle and ovals on the canvass. The program runs and produces a window with the radio buttons on top. I would like them on the bottom but changes to the row field have no effect. Anybody have any ideas on why I don't see my shape on the canvass? Thanks, Tony On 1/19/13 1:02 PM, "Alan Gauld" wrote: >On 19/01/13 20:31, anthonym wrote: > >> rbRed = Radiobutton(frame1, text = "Red", bg = "red", >> variable = self.v2, >> value = 1, >> command = self.processRadiobutton) > >Here you assign your method to the button > >> # Add Radio Button process below once I figure that out > >But you haven't defined it, it does not exist. >So python complains. > >You need to define something, even just a pass: > > > def processRadioButton(self): pass > > >> 16, in __init__ >> command = self.processRadiobutton) >> AttributeError: 'Trafficlight' object has no attribute >>'processRadiobutton' > > >HTH > >-- >Alan G >Author of the Learn to Program web site >http://www.alan-g.me.uk/ > >___ >Tutor maillist - Tutor@python.org >To unsubscribe or change subscription options: >http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Traffic Light
Sure thing. Here is the code. And after that is the box I get with the
radio buttons but no shapes.
from tkinter import * # Import tkinter
class Trafficlight:
def __init__(self):
window = Tk()# Create a window
window.title("Traffic Light") # Set a title
# Place canvas in the window
self.canvas = Canvas(window, width = 480, height = 480, bg =
"white")
self.canvas.pack()
# 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 = 400, column = 1)
rbYellow.grid(row = 400, column = 2)
rbGreen.grid(row = 400, column = 3)
window.mainloop()# Create an event loop
# Display a rectangle
def displayRect(self):
self.canvas.create_rectangle(10, 10, 100, 100, 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)
# Add Radio Button process below once I figure that out
def processRadiobutton(self): pass
Trafficlight()
from tkinter import * # Import tkinter
class Trafficlight:
def __init__(self):
window = Tk()# Create a window
window.title("Traffic Light") # Set a title
# Place canvas in the window
self.canvas = Canvas(window, width = 480, height = 480, bg =
"white")
self.canvas.pack()
# 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 = 400, column = 1)
rbYellow.grid(row = 400, column = 2)
rbGreen.grid(row = 400, column = 3)
window.mainloop()# Create an event loop
# Display a rectangle
def displayRect(self):
self.canvas.create_rectangle(10, 10, 100, 100, 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)
# Add Radio Button process below once I figure that out
def processRadiobutton(self): pass
Trafficlight()
On 1/19/13 3:14 PM, "Matthew Ngaha" wrote:
>On Sat, Jan 19, 2013 at 10:56 PM, anthonym wrote:
>> Thanks again for the info Alan. I am still passing the button process
>> until I can get my rectangle and ovals on the canvass. The program runs
>> and produces a window with the radio buttons on top. I would like them
>>on
>> the bottom but changes to the row field have no effect.
>>
>> Anybody have any ideas on why I don't see my shape on the canvass?
>
>i doubt i can help, but it might help if you could paste the section
>of the code in relation to what you're explaining and tell us what
>it's doing? some people don't use tkinter so its a bit hard to
>understand what you're saying.
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[Tutor] Calculate hours
Hello All,
I originally wrote this program to calculate and print the employee with the
most hours worked in a week. I would now like to change this to calculate
and print the hours for all 8 employees in ascending order.
The employees are named employee 0 - 8
Any ideas?
Thanks,
Tony
Code below:
# Create table of hours worked
matrix = [
[2, 4, 3, 4, 5, 8, 8],
[7, 3, 4, 3, 3, 4, 4],
[3, 3, 4, 3, 3, 2, 2],
[9, 3, 4, 7, 3, 4, 1],
[3, 5, 4, 3, 6, 3, 8],
[3, 4, 4, 6, 3, 4, 4],
[3, 7, 4, 8, 3, 8, 4],
[6, 3, 5, 9, 2, 7, 9]]
maxRow = sum(matrix[0]) # Get sum of the first row in maxRow
indexOfMaxRow = 0
for row in range(1, len(matrix)):
if sum(matrix[row]) > maxRow:
maxRow = sum(matrix[row])
indexOfMaxRow = row
print("Employee 7", indexOfMaxRow, "has worked: ", maxRow, "hours")
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Re: [Tutor] Calculate hours
Thanks Dave
I think I would like to keep it simple. How would I get it to repeat and
print before deleting?
On 1/22/13 7:10 PM, "Dave Angel" wrote:
>On 01/22/2013 09:52 PM, anthonym wrote:
>> Hello All,
>>
>> I originally wrote this program to calculate and print the employee
>>with the
>> most hours worked in a week. I would now like to change this to
>>calculate
>> and print the hours for all 8 employees in ascending order.
>>
>> The employees are named employee 0 - 8
>>
>> Any ideas?
>>
>> Thanks,
>> Tony
>>
>> Code below:
>>
>>
>>
>> # Create table of hours worked
>>
>> matrix = [
>> [2, 4, 3, 4, 5, 8, 8],
>> [7, 3, 4, 3, 3, 4, 4],
>> [3, 3, 4, 3, 3, 2, 2],
>> [9, 3, 4, 7, 3, 4, 1],
>> [3, 5, 4, 3, 6, 3, 8],
>> [3, 4, 4, 6, 3, 4, 4],
>> [3, 7, 4, 8, 3, 8, 4],
>> [6, 3, 5, 9, 2, 7, 9]]
>>
>> maxRow = sum(matrix[0]) # Get sum of the first row in maxRow
>> indexOfMaxRow = 0
>>
>> for row in range(1, len(matrix)):
>> if sum(matrix[row]) > maxRow:
>> maxRow = sum(matrix[row])
>> indexOfMaxRow = row
>>
>> print("Employee 7", indexOfMaxRow, "has worked: ", maxRow, "hours")
>>
>>
>
>What other constraints does your professor make? For example, are you
>allowed to use sorting with custom key function?
>
>If you want to keep it simple, then invert your logic to find the min
>element. Then after finding that min element, print it, delete it, and
>repeat the whole thing till the matrix is empty.
>
>
>
>
>--
>DaveA
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Re: [Tutor] Calculate hours
Thanks Dave. I forgot to hit the reply to all last time. I am going to try the loop when I get back home and will let you know how I make out. Also we have done some functions. Sort and append being among them. I try the simplest way first then stream line later. Probably not the fastest way. Tony On 1/23/13 3:05 PM, "Dave Angel" wrote: >You posted this privately to me. It should have been a message to the >forum, with tutor@python.org as its to: field. > >On 01/23/2013 10:42 AM, anthonym wrote: >> Should the outside loop have a print command in it so I don't loose that >> information like I do now? >> > >Yes, the print and the delete are technically in the outer loop. I was >thinking in terms of a function, in which case I probably would have >included those two elements in the function. But my wording was wrong. > >Can you write an attempted solution, and post it to the thread, along >with whatever difficulty you still see? > >Rough pseudo-code > >while something-in-list > find minimum element (this is a loop, similar to the one you >already wrote) > print out whatever you need from that element > delete that element > >print out "success" > > > >-- >DaveA ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] lambda
Hello All,
I have the code below that I used to create a simple tic tac toe game for
class. I am learning Python but have programmed in C+ before so I brought
over a lambda and found that it worked in Python. Unfortunately I don't
think my classmates will understand the use of lambda here but I am having
are hard time converting that to strictly python.
Let me know if it can be done.
Thanks
from tkinter import *
def ttt(r,c):
global player
if player == 'X':
b[r][c].configure(text = 'X')
player = 'O'
else:
b[r][c].configure(text = 'O')
player = 'X'
root = Tk()
b = [[0, 0, 0],
[0, 0, 0],
[0, 0, 0]]
for i in range(3):
for j in range(3):
b[i][j] = Button(font=('Aerial', 56), width=3, bg='yellow',
command = lambda r=i,c=j: ttt(r,c))
b[i][j].grid(row = i, column = j)
player = 'X'
mainloop()
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Re: [Tutor] lambda
Thanks Alan. I prefer the lambda too. Especially given how much code I
saved. I forgot about i and j being dynamic and the call function.
On 1/25/13 4:14 PM, "Alan Gauld" wrote:
>On 25/01/13 23:57, anthonym wrote:
>
>> I don't think my classmates will understand the use of lambda here but I
>> am having are hard time converting that to strictly python.
>
>lambdas are strictly python but they can be easily reanslated into a
>named function as
>
>lambda p: expr
>
>becomes
>
>def f(p):
>return expr
>
>so in your case
>
> > b[i][j] = Button(font=('Aerial', 56), width=3, bg='yellow',
> > command = lambda r=i,c=j: ttt(r,c))
>
>becomes
>
>def bCmd(r=i,c=j):
> return ttt(r,c)
>
>b[i][j] = Button(font=('Aerial', 56), width=3, bg='yellow',
> command = bCmd)
>
>Your problem of course is that you need i and j to be dynamically
>defined so you need to create and call a function that returns a
>function like this
>
>def buttonFunMaker(i,j):
> def func(x=i,y=j):
> return ttt(x,y)
> return func
>
>b[i][j] = Button(font=('Aerial', 56), width=3, bg='yellow',
> command = buttonFunMaker(i,j))
>
>Personally I prefer the lambda...
>
>HTH
>
>--
>Alan G
>Author of the Learn to Program web site
>http://www.alan-g.me.uk/
>
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