将 time.sleep() 函数限制为 python 中的一个循环

Question

我正在创建一个银行界面，我希望每 10 秒应用一次年利息（作为修改后的时间尺度的一部分）。

import time

customers = 100
savings = []
fixdeposit = []

ask_user_type = """
What is your user type?
(type 1 if you're an employee)
(type 2 if you're a customer)
"""

employee_function_options = """
What function would you like to carry out?
(type 1 for total savings value)
(type 2 for a specific savings value)
(type 3 for total fixed deposit value)
(type 4 for a specific fd's value)
(type 5 to add a customer)
(type 6 to remove a customer)
(type 7 to end program)
"""

customer_function_options = """
What function would you like to carry out?
(type 1 for withdrawal)
(type 2 for deposit)
(type 3 for savings account balance)
(type 4 to create fixed deposit)
(type 5 to end fixed deposit)
(type 6 for fixed deposit value)
(type 7 to end program)
"""

for i in range (100):
    savings.append(1000)
    fixdeposit.append(0)

while 1 == 1:
    time.sleep(10)
    savings = [i * 1.04 for i in savings]
    fixdeposit = [i * 1.07 for i in fixdeposit]

user = int(input(ask_user_type))

while 1==1:
    if user == 1:
        function = int(input(employee_function_options))
        if function == 1:
            print (sum(savings))
            function = int(input(employee_function_options))

        elif function == 2:
            saving_account = int(input("What is the chosen account's number?"))
            print (savings[saving_account])
            function = int(input(employee_function_options))

        elif function == 3:
            print (sum(fixdeposit))
            function = int(input(employee_function_options))

        elif function == 4:
            fd_no = int(input("What is the chosen fd's number?"))
            print(fixdeposit[fd_no])
            function = int(input(employee_function_options))

        elif function == 5:
            no_new_customers = int(input("How many new customers do you want to add?"))
            for i in range(no_new_customers):
                savings.append(1000)
                fixdeposit.append(0)
            print ("Task Completed")
            function = int(input(employee_function_options))

        elif function == 6:
            account_deleted = int(input("What is the number of the account to be deleted?"))
            savings[account_deleted] = 0
            fixdeposit[account_deleted] = 0
            print ("Task Completed")
            function = int(input(employee_function_options))

        elif function == 7:
            print ("program ended")
            user = int(input(ask_user_type))

        else:
            print("Error")
            function = int(input(employee_function_options))


    elif user == 2:
        function = int(input(customer_function_options))
        if function == 1:
            account_no = int(input("What is your account number?"))
            withdrawal_amount = float(input("How much money do you want to withdraw?"))
            savings[account_no] = savings[account_no] - withdrawal_amount
            withdrawal_amount = 0
            function = int(input(customer_function_options))

        elif function == 2:
            account_no = int(input("What is your account number?"))
            deposit_amount = float(input("How much money do you want to deposit?"))
            savings[account_no] = savings[account_no] + deposit_amount
            deposit_amount = 0
            function = int(input(customer_function_options))

        elif function == 3:
            account_no = int(input("What is your account number?"))
            print(savings[account_no])
            function = int(input(customer_function_options))

        elif function == 4:
            account_no = int(input("What is your account number?"))
            fd_amount = float(input("How much money do you want in your fd?"))
            fixdeposit[account_no] = fd_amount
            fd_amount = 0
            function = int(input(customer_function_options))

        elif function == 5:
            account_no = int(input("What is your account number?"))
            savings[account_no] = savings[account_no] + fixdeposit[account_no]
            fixdeposit[account_no] = 0
            function = int(input(customer_function_options))

        elif function == 6:
            account_no = int(input("What is your account number?"))
            print(fixdeposit[account_no])
            function = int(input(customer_function_options))

        elif function == 7:
            user = int(input(ask_user_type))

        else:
            print("Error")
            function = int(input(customer_function_options))


    else:
        print("Error")
        user = int(input(ask_user_type))

我使用了 time.sleep()，但在我看来，它也阻止了用户界面的工作。

有谁知道将 time.sleep() 函数限制在感兴趣的循环中的任何解决方法或方法？

Answer 1

您的 while 循环永远不会中断以允许程序的其他部分运行。

Answer 2

尝试使用threading，将更新savings和fixdeposit的部分移动到另一个线程。这是一个有效的例子，我只截断了你代码中没有改变的部分，你会看到每 10 秒打印一次 updating：

import threading
import time

customers = 100
savings = []
fixdeposit = []

ask_user_type = ...

employee_function_options = ...

customer_function_options = ...

for i in range (100):
    savings.append(1000)
    fixdeposit.append(0)


def regular_update():
    global savings, fixdeposit
    while True:
        time.sleep(10)
        print('updating')
        savings = [i * 1.04 for i in savings]
        fixdeposit = [i * 1.07 for i in fixdeposit]


my_thread = threading.Thread(target=regular_update, args=())
my_thread.start()

user = int(input(ask_user_type))
... everything here as in your code

Answer 3

while 1 == 1:
    time.sleep(10)
    savings = [i * 1.04 for i in savings]
    fixdeposit = [i * 1.07 for i in fixdeposit]

由于 while 循环中的条件 1 == 1，它会永远执行，因为程序无法在内部中断循环。这意味着您的 time.sleep(10) 会无限期地运行。

更新： 假设您想要来自用户的 valid 输入（取决于您定义为有效的内容），您可以执行以下操作之一：

number = (int)(input("Enter a number: "))

# 3 is just chosen here as a representative value
# The loop will run until 3 is received as input
while number != 3: 
  number = (int)(input("Enter a number: "))

print("Exited loop")

或者您可以使用 break 语句在满足条件时退出循环：

# 3 is just chosen here as a representative value
# The loop will run indefinitely, but if 3 is received as input, it will break the loop (force it to exit)
while 1 == 1:
  number = (int)(input("Enter a number: "))
  if number == 3:
    break

print("Exited loop")

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