python file(.py) not working with my tkinter project

[DeanAseraf1]

This is my code:

from tkinter import *
from tkinter import ttk
import pyperclip
import ast


def fst_window():
    password_label = Label(root, text="Password:")
    password_label.grid(row=0, column=0)
    password_holder = StringVar()
    password_entry = Entry(root, textvariable=password_holder, show="*")
    password_entry.grid(row=0, column=1)
    enter1_button = Button(root, text="Enter", command=lambda: pass_checker(password_holder))
    enter1_button.grid(row=0, column=3)
    root.bind("<Return>", lambda event: pass_checker(password_holder))


def start_prog():
    root.destroy()

    form = Tk()
    form.title("Passwords")
    form.geometry("275x300+700+400")
    tab_parent = ttk.Notebook(form)

    tab1 = ttk.Frame(tab_parent)
    website_label = Label(tab1, text="Website:")
    website_label.grid(row=0, column=0)
    website_holder = StringVar()
    website_entry = Entry(tab1, textvariable=website_holder)
    website_entry.grid(row=0, column=1)
    passwords_label = Label(tab1, text="Password:")
    passwords_label.grid(row=1, column=0)
    passwords_holder = StringVar()
    passwords_entry = Entry(tab1, textvariable=passwords_holder, show="*")
    passwords_entry.grid(row=1, column=1)
    enter2_button = Button(tab1, text="Enter", command=lambda: viewer(website_holder, passwords_holder))
    enter2_button.grid(row=2, columnspan=2)
    form.bind("<Return>", lambda event: viewer(website_holder, passwords_holder))

    tab2 = ttk.Frame(tab_parent)
    new_webpas = []

    def viewer(web, pas):
        try:
            website = web.get()
            password = pas.get()
            if website not in new_webpas:
                new_webpas.append(password)
                new_webpas.append(website)
                fst_password = Label(tab2, text=str(website) + '==>' + str(password))
                fst_password.grid(column=0)
                fst_paste_button = Button(tab2, text="Copy", command=lambda: copy(str(password)))
                fst_paste_button.grid(column=1)
                fst_del_button = Button(tab2, text="Delete")
                fst_del_button.grid(column=2)
                website_entry.delete(0, END)
                passwords_entry.delete(0, END)
            else:
                print("You already have this website in the list")
        except AttributeError:
            fst_password = Label(tab2, text=str(web) + '==>' + str(pas))
            fst_password.grid(column=0)
            fst_paste_button = Button(tab2, text="Copy", command=lambda: copy(str(pas)))
            fst_paste_button.grid(column=1)
            fst_del_button = Button(tab2, text="Delete", command=lambda: delete(fst_del_button, fst_paste_button, fst_password, web, pas))
            fst_del_button.grid(column=2)

    def delete(delete, pst, password, website, pas):
        delete.grid_remove()
        pst.grid_remove()
        password.grid_remove()
        new_webpas.remove(pas)
        new_webpas.remove(website)

    def copy(password):
        pyperclip.copy(password)

    def saver():
        lstfile_wr = open("C:\\Users\\Dean\\Desktop\\Passwords.txt", "w+")
        lstfile_wr.write(str(new_webpas))
        lstfile_wr.close()

    def updater():
        lstfile_r = open("C:\\Users\\Dean\\Desktop\\Passwords.txt", "r")
        readtext = lstfile_r.read()
        lstfile_r.close()
        try:
            nano = ast.literal_eval(readtext)
        except SyntaxError:
            nano = ""
            print("Your file is empty")

        index = 1
        for item in nano:
            if index % 2 != 0:
                password = item
                if password not in new_webpas:
                    new_webpas.append(password)
                    index += 1
                else:
                    print("You already have this password in the list")
            else:
                website = item
                if website not in new_webpas:
                    new_webpas.append(website)
                    viewer(website, password)
                    index += 1
                else:
                    print("You already have this website in the list")

    tab3 = ttk.Frame(tab_parent)
    save_button = Button(tab3, text="Save", command=saver)
    save_button.pack()
    load_button = Button(tab3, text="Load", command=updater)
    load_button.pack()

    tab_parent.add(tab1, text="Enter Passwords")
    tab_parent.add(tab2, text="Copy Passwords")
    tab_parent.add(tab3, text="Load and Save")
    tab_parent.pack(expand=0, fill='both')
    updater()
    form.mainloop()


def pass_checker(gvn_password):
    cur_pass = "44"
    password = gvn_password.get()
    if password == cur_pass:
        start_prog()
    else:
        print("Password Incorrect!")


root = Tk()
root.title("Passwords")
root.geometry('225x30+750+480')
fst_window()

root.mainloop()

Sorry it's so messy but I'm new to coding.

My problem is that when I run the project in Pycharm it works fine, but when I'm trying to run it by opening the .py file it start normally and close before the Tkinter window even appeared.