Tkinter module test: widget class not inserted in application frame

[MRAB]

On 2022-06-17 17:19, Rich Shepard wrote:
> I'm not seeing the error source in a small tkinter module I'm testing.
> 
> The module code:
> -----------
> import tkinter as tk
> from tkinter import ttk
> 
> import common_classes as cc
> 
> class ConactNameInput(tk.Frame):
>       def __init__(self, parent, *args, **kwargs):
>           super().__init__(parent, *args, **kwargs)
>           # A dict to keep track of input widgets
>           self.inputs = {}
> 
>           self.inputs['Last name'] = cc.LabelInput(
>               ContactNameInput, 'lname',
>               input_class = ttk.Entry,
>               input_var = tk.StringVar()
>               )
>           self.inputs['Last name'].grid(row = 0, column = 0)
>           #
>           self.inputs['First name'] = cc.LabelInput(
>               ContactNameInput, 'fname',
>               input_class = ttk.Entry,
>               input_var = tk.StringVar()
>               )
>           self.inputs['First name'].grid(row = 0, column = 1)
> 
>           okay_button = tk.Button(self, text="OK",
>                                   command=self.ok)
>           okay_button.pack(side=tk.LEFT, padx=(20, 0), pady=(0, 20))
> 
>           cancel_button = tk.Button(self, text="Cancel",
>                                     command=self.cancel)
>           cancel_button.pack(side=tk.RIGHT, padx=(0, 20), pady=(0, 20))
> 
>       def okay_button(self):
>           pass
> 
>       def cancel_button(self):
>           Quitter()
> 
>       def get_last_name(self):
>           pass
> 
>       def get_first_name(self):
>           pass
> 
> 
> class NameApplication(tk.Tk):
>       def __init__(self, *args, **kwargs):
>           super().__init__(*args, **kwargs)
>           self.title("Contact Name")
>           self.geometry("800x600")
>           self.resizable(width = False, height = False)
>           ContactNameInput(self).grid(row = 0, column = 0, sticky=('EWNS'))
>           self.columnconfigure(0, weight=1)
> 
> if __name__ == '__main__':
>       app = NameApplication()
>       app.mainloop()
> ----------
> 
> The python error traceback:
> ----------
> Traceback (most recent call last):
>     File "contact_history_name_input.py", line 60, in <module>
>       app = NameApplication()
>     File "contact_history_name_input.py", line 55, in __init__
>       ContactNameInput(self).grid(row = 0, column = 0, sticky=('EWNS'))
>     File "contact_history_name_input.py", line 17, in __init__
>       input_var = tk.StringVar()
>     File "/home/rshepard/development/BusinessTracker/views/common_classes.py", line 46, in __init__
>       super().__init__(parent, **kwargs)
>     File "/usr/lib64/python3.7/tkinter/__init__.py", line 2744, in __init__
>       Widget.__init__(self, master, 'frame', cnf, {}, extra)
>     File "/usr/lib64/python3.7/tkinter/__init__.py", line 2292, in __init__
>       BaseWidget._setup(self, master, cnf)
>     File "/usr/lib64/python3.7/tkinter/__init__.py", line 2262, in _setup
>       self.tk = master.tk
> AttributeError: type object 'ContactNameInput' has no attribute 'tk'
> ----------
> 
> I'm not correctly placing the NameInput class in the NameApplication frame.
> What have I missed?
> 
You haven't shown the code for common_classes.LabelInput, but I'm 
guessing that the first argument should be the parent.

You're passing in the _class_ ConactNameInput, but I'm guessing that it 
should be an _instance_ of that class, in this case, 'self'.