What is correct: widget.rowconfigure or widget.grid_rowconfigure?

Question

When using grid geometry manager. Let's say you have:

import tkinter as tk
from tkinter import ttk

root = tk.Tk()
root.rowconfigure(0, weight=1)
root.columnconfigure(0, weight=1)
ttk.Button(root, text="Hello World").grid(sticky=tk.NSEW)
root.mainloop()

The part where you specify the weight of the row/column can also be coded up as:

root.grid_rowconfigure(0, weight=1)
root.grid_columnconfigure(0, weight=1)

For this example, what is correct method: widget.rowconfigure or widget.grid_rowconfigure? and why?

Bonus: From an implementation POV, why do both work?

Answer 1

widget.rowconfigure is literally just an alias for widget.grid_rowconfigure. In the source code for tkinter is this line of code:

rowconfigure = grid_rowconfigure

I don't know for a fact, but I suspect that widget.rowconfigure was just added for convenience. Frankly, I didn't even know it existed until I read this question.

In my opinion, grid_rowconfigure is the proper name to use. I say that because tkinter is an interface to an underlying tcl/tk interpreter, and in tcl/tk the command is grid rowconfigure. Since most tkinter functions mirror the naming conventions of the tcl/tk functions as close as possible, grid_rowconfigure is the natural choice.