Why are my Tkinter Widgets Stored as None?

Why My Tkinter Widgets Are Stored as None

In this instance, you are encountering an issue where your Tkinter widgets are being stored as None in an array. When you call the widgets, they are not available.

Understanding the Issue

Tkinter grid, pack, and place methods are in-place operations and always return None. Therefore, attempting to call these methods on the same line as widget creation will result in None being assigned to the widget variable.

Solution

To resolve this issue, split the widget creation and method call into separate lines:

<code class="python"># Create the widget
button = Button(...)

# Call the grid method
button.grid(...)

# Pack method
button.pack(...)

# Place method
button.place(...)</code>

Applying to Your Code

In your code, modify the widget creation and method calls as follows:

<code class="python">b[c + (r * 10)] = Button(f, text=chr(97 + c + (r * 10)), command=lambda a=c + (r * 10): color(a), borderwidth=1, width=5, bg="white")
b[c + (r * 10)].grid(row=r, column=c)</code>

Now, your widgets will be accessible and respond correctly when you interact with the GUI.

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