Error in trying to open dialog box from a widget button in python

Question

I'm new to python. I'm trying to open a dialog box to get a value from within a widget that does a list of other staff allready.

But getting errors and can't figure out what to do.

Here's my code:

import Tkinter,Tkconstants,tkFileDialog
from Tkinter import *
import csv
import numpy
import math
import numpy.random as nrnd
import matplotlib.pyplot as plt
import shutil
import tkMessageBox
global filesavepath
class App:
    def __init__(self,master):
        self.mymaster=master
        frame=Frame(master)
        frame.pack()
        self.importbutton=Button(frame,text='Import Data',command=self.importdata)
        self.importbutton.pack()
        self.executebutton=Button(frame,text='Execute',command=self.popup)
        self.executebutton.pack()
        self.distribution_rep=Button(frame,text='Repeat Purchase Score Distribution',command=self.distrepbutton)
        self.distribution_rep.pack()
        self.distribution_churn=Button(frame,text='Churn Probability Distribution',command=self.distchurnbutton)
       self.distribution_churn.pack()
       self.exitbutton=Button(frame,text='Exit',command=self.exitapp)
       self.exitbutton.pack()
       self.file_opt=options={}
       options['defaultextension']=''
       options['filetypes']=[('allfiles','.*'),('textfiles','.txt')]
       options['initialdir']='C:\\'
       options['initialfile']='myfile.txt'
       options['parent']=root
       options['title']='Thisisatitle'
    def importdata(self):
        filename=tkFileDialog.askopenfilename(**self.file_opt)
        filesavepath="C:/input_full.csv"
        shutil.copy2(filename,filesavepath)
        if filename:
            return open(filename,'r')

    def popup(self):
        top = self.top = Tkinter.Toplevel(self)
        myLabel = Tkinter.Label(top, text='Enter your username below')
        myLabel.pack()

        self.myEntryBox = Tkinter.Entry(top)
        self.myEntryBox.pack()

        mySubmitButton = Tkinter.Button(top, text='Done', command=self.execbutton)
        mySubmitButton.pack()
    def execbutton(self):
        if self.myEntryBox.get() != "":
            self.timevalue = self.myEntryBox.get()
            self.top.destroy()
        execfile("Repeat Purchase Algo in python v6")
        tkMessageBox.showinfo("Job Done", "Probability Computation completed")       
    def send(self):
        global timevalue
        timevalue=self.myEntryBox.get()
        self.top.destroy()
    def distrepbutton(self):
        plt.hist(prob,bins=10,normed=TRUE)
        plt.xlabel('Probability')
        plt.title('Histogram of Repeat Purchase Probability')
        plt.show()
    def distchurnbutton(self):
        plt.hist(churn_prob,bins=10,normed=TRUE)
        plt.ylabel('Probability')
        plt.title('Histogram of Churn Probability')
        plt.show()
    def exitapp(self):
        self.mymaster.destroy()

root=Tk()
root.title('Repeat Puchase Widget')
app=App(root)
root.mainloop()

So as may be apparent to you, I'm importing dataset with an Import button, executing some analysis in another code through a button called Execute, and then showing some graphs.

What I wanted was to open a pop up kind of window on click of "Execute" button that will input a value. But I'm getting the following error:

Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\Python27\lib\lib-tk\Tkinter.py", line 1410, in __call__
    return self.func(*args)
  File "C:/Python27/widget_repeat_purchase_v4", line 42, in popup
    top = self.top = Tkinter.Toplevel(self)
  File "C:\Python27\lib\lib-tk\Tkinter.py", line 2017, in __init__
    BaseWidget.__init__(self, master, 'toplevel', cnf, {}, extra)
  File "C:\Python27\lib\lib-tk\Tkinter.py", line 1965, in __init__
    BaseWidget._setup(self, master, cnf)
  File "C:\Python27\lib\lib-tk\Tkinter.py", line 1943, in _setup
    self.tk = master.tk
AttributeError: App instance has no attribute 'tk'

I've no idea what to do. Please help.

If you wander why there are som many imports, please note they are for the second python script I'm running through here — Anindya Sankar Dey
– Anindya Sankar Dey, Commented Jul 29, 2012 at 5:36

Bryan Oakley · Accepted Answer · 2012-07-29 12:06:24Z

1

When you create the toplevel widget, you are passing self as the first argument. Tkinter requires that this be a parent widget. However, in your code self does not represent a widget.

In your specific case you want to pass in self.mymaster rather than self:

top = self.top = Tkinter.Toplevel(self.mymaster)

answered Jul 29, 2012 at 12:06

Bryan Oakley

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1 Comment

Anindya Sankar Dey Over a year ago

Thanks Bryan, it worked...I didn't realize the mistake...really thanks

unddoch · Accepted Answer · 2012-07-29 10:34:43Z

0

Use Tkinter.Toplevel() instead of Tkinter.Toplevel(self)

answered Jul 29, 2012 at 10:34

unddoch

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