Python if语句中的输入未按预期工作

if语句中的输入无效。我使用的是Python3，问题在于定义函数中的第一个if语句

import random

random1 = random.randint(1, 11)
random2 = random.randint(1, 11)
correct = random1 * random2
list_of_correct = []
list_of_wrong = []


def ex():
    proceed = input("Proceed?: ")
    if proceed.lower == "yes":
        ans = input("What is " + str(random1) + " * " + str(random2) + "?: ")
        if int(ans) == correct:
            print("Correct!")
            list_of_correct.append(str(random1 + ":" + str(random2) + ":" + str(ans)))
            print(ex())
        else:
            print("Incorrect!")
            list_of_wrong.append(str(random1) + ":" + str(random2) + ":" + str(ans))
    elif proceed.lower == "mfm":
        print(list_of_correct)
        print(list_of_wrong)


print(ex())

---

您将一个函数

与一个字符串
“yes”
进行比较。它们从来都不相同

您需要调用以下函数：

if proceed.lower() == "yes":

将输入转换为小写以便比较

print("".lower) # <built-in method lower of str object at 0x7fc134277508>

打印（“.lower”）#
比较一个函数
继续。将
与字符串
'yes'
放低-它们从来都不一样

您需要调用以下函数：

if proceed.lower() == "yes":

将输入转换为小写以便比较

print("".lower) # <built-in method lower of str object at 0x7fc134277508>

打印（“.lower”）#
固定代码

import random

random1 = random.randint(1, 11)
random2 = random.randint(1, 11)
correct = random1 * random2
list_of_correct = []
list_of_wrong = []


def ex():
    proceed = input("Proceed?: ")
    if proceed.lower() == "yes":
        ans = input("What is " + str(random1) + " * " + str(random2) + "?: ")
        if int(ans) == correct:
            print("Correct!")
            list_of_correct.append(str(random1 + ":" + str(random2) + ":" + str(ans)))
            print(ex())
        else:
            print("Incorrect!")
            list_of_wrong.append(str(random1) + ":" + str(random2) + ":" + str(ans))
    elif proceed.lower() == "mfm":
        print(list_of_correct)
        print(list_of_wrong)


print(ex())

固定代码

import random

random1 = random.randint(1, 11)
random2 = random.randint(1, 11)
correct = random1 * random2
list_of_correct = []
list_of_wrong = []


def ex():
    proceed = input("Proceed?: ")
    if proceed.lower() == "yes":
        ans = input("What is " + str(random1) + " * " + str(random2) + "?: ")
        if int(ans) == correct:
            print("Correct!")
            list_of_correct.append(str(random1 + ":" + str(random2) + ":" + str(ans)))
            print(ex())
        else:
            print("Incorrect!")
            list_of_wrong.append(str(random1) + ":" + str(random2) + ":" + str(ans))
    elif proceed.lower() == "mfm":
        print(list_of_correct)
        print(list_of_wrong)


print(ex())

更新了一个打字错误@wjandrea.更新了一个打字错误@wjandrea。