Window (Tkinter) in another file shows up whenever the main script is executed

Question

Good day everyone. I've been baffled dealing with my python code. Im using Tkinter for my GUI for our individual school project.

I have this code as a window (for my Create menu in menu bar in main.py) on another file (let's say functions.py):

def createNew(coord):
    #create a new window element
    createWindow = tk.Tk()
    createWindow.title("Create a new tracker")
    createWindow.geometry("350x400")

    createWindow.focus_force()
    createWindow.grab_set()

    x = coord[0]
    y = coord[1]

    createWindow.geometry("+%d+%d" % (x + 250, y + 200))

The above code has that coord argument which receives the input from main.py with this code (the functions.py is imported as funct):

parentPosition = [window.winfo_x(), window.winfo_y()]
...
menubar = tk.Menu(window)
#file menu
file = tk.Menu(menubar, tearoff=0)
file.add_command(label='Create new tracker', command=funct.createNew(parentPosition))

My problem is that whenever I execute the main.py, this window from functions.py automatically shows up even though I didn't select the Create menu from main.py. The intended location is correct anyway.

Actual snapshot of the UI

What is the issue within my code? Any insights would be appreciated.

PS. I intentionally put the function createNew in functions.py rathen than on main.py

score 0 · Accepted Answer · answered May 29 '22 at 12:06

You execute the function immediately when you run the line

file.add_command(label='Create new tracker', command=funct.createNew(parentPosition))

This is because, by putting a pair of brackets after the function name, you call it right away, and pass its return value to the add_command function.

In order to get around this, you can use the lambda keyword to delay execution of the function until it is called again:

file.add_command(label='Create new tracker', command=lambda: funct.createNew(parentPosition))

You can find out more about lambda functions here.

Window (Tkinter) in another file shows up whenever the main script is executed

1 Answers1