[Python] Multiple screens | python custom Tkinter

In my Tkinter chatbot app, clicking the 'History' menu opens a new window every time. How can I make it so only one history window exists, and if it's already open, bring it to focus instead of opening another?

my history window code:

def show_history():
win.withdraw()

def open_file(file_path, text_widget):
try:
with open(file_path, "r", encoding="utf-8") as file:
content = file.read()
text_widget.delete("1.0", "end")
text_widget.insert("1.0", content)
except FileNotFoundError:
text_widget.delete("1.0", "end")
text_widget.insert("1.0", f"Error: File not found at {file_path}")
except Exception as e:
text_widget.delete("1.0", "end")
text_widget.insert("1.0", f"An error occurred: {e}")

def close_new_window():
root.destroy()
win.deiconify()

root = ctk.CTkToplevel()
root.geometry(f"{HEIGHT}x{WIDTH}")

file_content_textbox = ctk.CTkTextbox(root, wrap="word")
file_content_textbox.pack(fill="both", expand=True, padx=10, pady=10)

file_to_load = resource_path("data.txt")

open_file(file_to_load, file_content_textbox)

button = ctk.CTkButton(root, text="Close", command=close_new_window)
button.pack(pady=50)

root.mainloop()

Continue reading...