On 01/-10/-28163 02:59 PM, David Holland wrote:
Hi All,
I hope this makes sense
I am trying to write a GUI where you click on a button and each time
you click on the button it shows in the entry text how many times you
have clicked. However when I changed an earlier version of the code to
pass a parameter it errors.
This works :-
from Tkinter import *
class Application(Frame):
"""GUI App"""
def __init__(self, master):
"""Initialize the frame."""
Frame.__init__(self, master)
self.grid()
self.create_widgets()
def create_widgets(self):
self.inst_lbl=Label(self, text="Click on the button to get
instructions")
self.inst_lbl.grid(row=0, column=0, columnspan=2, sticky=W)
self.pw_lbl=Label(self, text="Password")
self.submit_bttn=Button(self, text="Submit", command=self.reveal)
self.submit_bttn.grid(row=1, column=1, columnspan=2, sticky=W)
self.secret_text=Text(self, width=35, height=5, wrap=WORD)
self.secret_text.grid(row=2, column=1, columnspan=2, sticky=W)
self.helpinfo()
def reveal(self):
Calmexob = Calmex()
results = Calmexob.getmess()
self.secret_text.delete(0.0, END)
self.secret_text.insert(0.0,results)
def helpinfo(self):
self.secret_text.insert(0.0,"Start")
class Calmex(object):
def __init__(self):
"""Default arg"""
def getmess(self):
mesg="Test"
return mesg
#main
root=Tk()
root.title("Test")
root.geometry("400x300")
app=Application(root)
root.mainloop()
But when I changed it to use a number I get an error message.
Here is the code
from Tkinter import *
class Application(Frame):
"""GUI App"""
def __init__(self, master):
"""Initialize the frame."""
Frame.__init__(self, master)
self.grid()
x=0
self.create_widgets(x)
def create_widgets(self,x):
self.inst_lbl=Label(self, text="Click on the button to get
instructions")
self.inst_lbl.grid(row=0, column=0, columnspan=2, sticky=W)
self.pw_lbl=Label(self, text="Password")
x= self.submit_bttn=Button(self, text="Submit",
command=self.reveal(x))
self.submit_bttn.grid(row=1, column=1, columnspan=2, sticky=W)
self.secret_text=Text(self, width=35, height=5, wrap=WORD)
self.secret_text.grid(row=2, column=1, columnspan=2, sticky=W)
self.helpinfo()
def reveal(self, x):
Calmexob = Calmex(x)
results = Calmexob.getmess(x)
self.secret_text.delete(0.0, END)
self.secret_text.insert(0.0,results)
x=x+1
return x
def helpinfo(self):
self.secret_text.insert(0.0,"Start")
class Calmex(object):
def __init__(self,x):
"""Default arg"""
def getmess(self,x):
mesg="Test"+str(x)
return mesg
#main
root=Tk()
root.title("Test")
root.geometry("400x300")
app=Application(root)
root.mainloop()
The error message is
AttributeError: Application instance has no attribute 'secret_text'
The only change is that I have declared x and changed the function reveal to
take and pass x as an arguement.
Thanks in advance. I hope this makes sense.
I don't have time to try to understand all the tk stuff. And it sure
would have been nice if you showed the whole error message, including
the traceback. You didn't even tell us what line it was on.
But your problem is that you have an instance of Application without the
secret_text attribute, but you're trying to use it. You should get in
the habit of initializing all attributes in __init__(). Anyway, it
looks like the only places that could get the error are inside the
methods reveal() and selfinfo(). If either gets called before
create_widget() finishes, you could get this error.
The stack trace would show just what combination of method calls is
making this happen.
DaveA
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