[Python] Why is my code closing right after I run it by doubleclicking? [closed]

This code reproduces my problem (it's just a button that does nothing):

import customtkinter as tk

tk.set_appearance_mode("dark")
tk.set_default_color_theme("dark-blue")

root = tk.CTk()

root.title("File Organizer")
root.iconbitmap("assets/icon.ico")
root.geometry("600x350")

run_button = tk.CTkButton(root, text="Run", height=45, width=90,
font=("Helvetica", 23), corner_radius=18)
run_button.pack(padx=5)

if __name__ == '__main__':
root.mainloop()


When I run it or any other piece of code that I have written (except for code using tkinter) by doubleclicking the corresponding Python script, the program immediately closes, but if I use an IDE or run it through the terminal, there's no issue, how can I fix it?

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