如何使用在它之外的for循环中定义的变量？

Question

How can I use this u_name and u_pass outside this for loop?

cursr.execute("SELECT rowid ,* FROM usernameandpassword")
user_and_pass = (cursr.fetchall())

for users in user_and_pass:
    global u_name
    global u_pass
    u_name = (users[1])
    u_pass = (users[2])

    if uni_username.get() == u_name and uni_pass.get() == u_pass:
        show_new_user_window()

Answer 1

you could create another two lists like name_list and pass_list , and initialize them before for-loop and inside for loop use name_list.append(user[1]) , pass_list.append(user[2]) , after for-loop use index to get each name and pass

# intialize name_list and pass_list lists
name_list = []
pass_list = []
for users in user_and_pass:
    # save them into our lists
    name_list.append(users[1])
    pass_list.append(users[2])

outside this for loop, name_list[0] will refer to the first value, name_list[1] will refer to second value and so on.