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I was trying out a python code example at Rosetta Code - a programming chrestomathy site, where solutions to the same task are presented in as many different programming languages as possible. For this task, the goal is to input a string and the integer 75000, from graphical user interface. The code is shown below: import tkSimpleDialog number = tkSimpleDialog.askinteger("Integer", "Enter a Number") string = tkSimpleDialog.askstring("String", "Enter a String") However, when I try to run the code, I get the following error: Traceback (most recent call last): File "C:\Users\vix\Documents\.cache\GUIexample.py", line 3, in <module> number = tkSimpleDialog.askinteger("Integer", "Enter a Number") File "C:\Python27\lib\lib-tk\tkSimpleDialog.py", line 262, in askinteger d = _QueryInteger(title, prompt, **kw) File "C:\Python27\lib\lib-tk\tkSimpleDialog.py", line 189, in __init__ Dialog.__init__(self, parent, title) File "C:\Python27\lib\lib-tk\tkSimpleDialog.py", line 53, in __init__ if parent.winfo_viewable(): AttributeError: 'NoneType' object has no attribute 'winfo_viewable' Where could the problem be? Thanks

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