所以我正在使用tkinter和密码学在python中建立一个注册登录系统。我几乎粘贴了所有代码，但您只需要关注 user_register（）和user_login（）。 在user_register中，f_1_user_register（示例）设置为global，但是我无法在user_login（）中访问它。我想访问在user_login（）中的user_register（）中设置为global的所有内容。 我按照本教程中的“基础”进行操作，更改了大部分代码：https://www.youtube.com/watch?v=Xt6SqWuMSA8&
def user_register():
global username_user_register
global password_user_register
global password_encrypt_user_register
global f_1_user_register
global key_1_user_register
path_1 = os.getcwd()
username_user_register = username_register_screen.get()
password_user_register = password_register_screen.get()
if (
not username_user_register.isalnum() or not len(username_user_register) >= 2 <= 26
or not password_user_register.isalnum() or not len(password_user_register) >= 8 <= 26
):
username_or_password_does_not_meet_requirements_label_user_register = Label(
screen_register, text="Error 1", bg="red", fg="white", width="18", height="2",
font=("Calibri", 14)
).grid(row=6, column=0, padx=5, pady=5)
username_entry_register_screen.delete(0, END)
password_entry_register_screen.delete(0, END)
else:
username_test_user_register = os.path.exists(path_1 + "\\Accounts\\" + username_user_register + ".txt")
if username_test_user_register:
username_exists_label_user_register = Label(
screen_register, text="Error 2", bg="red", fg="white", width="18", height="2",
font=("Calibri", 14)
).grid(row=6, column=0, padx=5, pady=5)
username_entry_register_screen.delete(0, END)
password_entry_register_screen.delete(0, END)
else:
key_1_user_register = Fernet.generate_key()
f_1_user_register = Fernet(key_1_user_register)
password_encode_user_register = password_user_register.encode()
password_encrypt_user_register = f_1_user_register.encrypt(password_encode_user_register)
user_file_user_register = open(path_1 + "\\Accounts\\" + username_user_register + ".txt", "w")
user_file_user_register.write(username_user_register)
user_file_user_register.write("\n" + str(password_encrypt_user_register))
user_file_user_register.write("\n" + str(f_1_user_register))
user_file_user_register.close()
username_entry_register_screen.delete(0, END)
password_entry_register_screen.delete(0, END)
registration_succesfull_label_user_register = Label(
screen_register, text="Registration Successful", bg="green", fg="white", width="18", height="2",
font=("Calibri", 14)
).grid(row=6, column=0, padx=5, pady=5)
def user_login():
username_user_login = username_login_screen.get()
password_user_login = password_login_screen.get()
path_2 = os.getcwd()
username_test_user_login = os.path.exists(path_2 + "\\Accounts\\" + username_user_login + ".txt")
if not username_test_user_login:
username_exists_label_user_login = Label(
screen_register, text="Error 3", bg="red", fg="white", width="18", height="2",
font=("Calibri", 14)
).grid(row=6, column=0, padx=5, pady=5)
username_entry_login_screen.delete(0, END)
password_entry_login_screen.delete(0, END)
else:
user_file_login = open(path_2 + "\\Accounts\\" + username_user_login + ".txt", "r")
password_test_user_file_user_login = user_file_login.read(1)
f_2 = key_1_user_reg
def register_screen():
global screen_register
global username_register_screen
global password_register_screen
global username_entry_register_screen
global password_entry_register_screen
screen_register = Toplevel(screen)
screen_register.title("RegisterScreen")
screen_register.geometry("620x620")
screen_register.configure(bg="dodger blue")
username_register_screen = StringVar()
password_register_screen = StringVar()
title_label_register_screen = Label(
screen_register, text="REGISTER", bg="royal blue", fg="white", width="18", height="2", font=("Calibri", 48)
).grid(row=0, column=0, padx=10, pady=10)
username_label_register_screen = Label(
screen_register, text="USERNAME", bg="royal blue", fg="white", width="18", height="2", font=("Calibri", 18)
).grid(row=1, column=0, padx=5, pady=5)
username_entry_register_screen = Entry(
screen_register, font=("Calibri", 18), textvariable=username_register_screen
)
username_entry_register_screen.grid(row=2, column=0, padx=5, pady=5)
password_label_register_screen = Label(
screen_register, text="PASSWORD", bg="royal blue", fg="white", width="18", height="2", font=("Calibri", 18)
).grid(row=3, column=0, padx=5, pady=5)
password_entry_register_screen = Entry(
screen_register, font=("Calibri", 18), textvariable=password_register_screen
)
password_entry_register_screen.grid(row=4, column=0, padx=5, pady=5)
continue_button_register_screen = Button(
screen_register, text="CONTINUE", height="1", width="18", fg="white", bg="medium sea green",
font=("Calibri", 26), command=user_register
).grid(row=5, column=0, padx=5, pady=5)
def login_screen():
global screen_login
global username_login_screen
global password_login_screen
global username_entry_login_screen
global password_entry_login_screen
screen_login = Toplevel(screen)
screen_login.title("RegisterScreen")
screen_login.geometry("620x620")
screen_login.configure(bg="dodger blue")
username_login_screen = StringVar()
password_login_screen = StringVar()
title_label_login_screen = Label(
screen_login, text="LOGIN", bg="royal blue", fg="white", width="18", height="2", font=("Calibri", 48)
).grid(row=0, column=0, padx=10, pady=10)
username_label_login_screen = Label(
screen_login, text="USERNAME", bg="royal blue", fg="white", width="18", height="2", font=("Calibri", 18)
).grid(row=1, column=0, padx=5, pady=5)
username_entry_login_screen = Entry(
screen_login, font=("Calibri", 18), textvariable=username_login_screen
)
username_entry_login_screen.grid(row=2, column=0, padx=5, pady=5)
password_label_login_screen = Label(
screen_login, text="PASSWORD", bg="royal blue", fg="white", width="18", height="2", font=("Calibri", 18)
).grid(row=3, column=0, padx=5, pady=5)
password_entry_login_screen = Entry(
screen_login, font=("Calibri", 18), textvariable=password_login_screen
)
password_entry_login_screen.grid(row=4, column=0, padx=5, pady=5)
continue_button_login_screen = Button(
screen_login, text="CONTINUE", height="1", width="18", fg="white", bg="medium sea green",
font=("Calibri", 26), command=user_login
).grid(row=5, column=0, padx=5, pady=5)
def main_screen():
global screen
screen = Tk()
screen.geometry("620x620")
screen.title("MainScreen")
screen.configure(bg="dodger blue")
title_label_main_screen = Label(
text="MAIN SCREEN", bg="royal blue", fg="white", width="18", height="2", font=("Calibri", 48)
).grid(row=0, column=0, padx=10, pady=10)
login_button_main_screen = Button(
text="LOGIN", height="1", width="18", fg="white", bg="medium sea green", font=("Calibri", 26),
command=login_screen
).grid(row=1, column=0, padx=10, pady=10)
register_button_main_screen = Button(
text="REGISTER", height="1", width="18", fg="white", bg="medium sea green", font=("Calibri", 26),
command=register_screen
).grid(row=2, column=0, padx=10, pady=10)
info_button_main_screen = Button(
text="INFO", height="1", width="18", fg="white", bg="medium sea green", font=("Calibri", 26),
command=info_screen
).grid(row=3, column=0, padx=10, pady=10)
screen.mainloop()
main_screen()