def add_subject_afterwards_to_file(subject_name, window, entry):
# Try to add the new subject to the file
added = Task.add_new_subject_to_file("ToDoList.txt", subject_name)
# Pop up a messagebox says the subject is existed
if added == "Repeated":
response = messagebox.askyesno(
"Repeated Subject",
"It seems like this subject has been already added. Want to add another one?"
)
if response == 0:
window.destroy()
else:
entry.delete(0, END)
# Pop up a messagebox says the subject has been added successfully
elif added == "Success":
entry.delete(0, END)
response = messagebox.showinfo("Successfully Added",
"Done! The new subject has been added")
