Python数学游戏级别未更改

Question

When I type level4 or level3 or level2 my game does not go to the requested level.

It prints the entered level (eg level1 ) and stays on level one.

print("Welcome to the maths skills testing machine!")
userinput = input("\nAre you ready to test your maths skills?")

print("\nWhich level would you like to play?")
userinput = input('''Level 1, Level 2, Level 3, Level 4''')

if userinput=="level1":
    level1()
elif userinput=="level2":
    level2()
elif userinput=="level3":
    level3()
elif userinput=="level4":
    level4()

def level1():

    import operator
    import random
    import time
    start = time.time()

    ops = {'+': operator.add,
           '-': operator.sub}

    num_a = random.randint(1, 10)
    num_b = random.randint(1, 10)
    op = random.choice(tuple(ops.keys()))

    print('{}{}{}=?'.format(num_a, op, num_b))
    expected_answer = ops[op](num_a, num_b)
    user_answer = int(input())
    if user_answer == expected_answer:
        print('Correct')
        print('It took you {0:0.1f} seconds to answer the 
question'.format(time.time() - start))
    else:
        print('Wrong')
        print('It took you {0:0.1f} seconds to answer the 
question'.format(time.time() - start))
    while user_answer == expected_answer:
        level1()
    else:
        exit()

level1()


def level2():

    import operator
    import random
    import time
    start = time.time()

    ops = {'+': operator.add,
           '-': operator.sub}

    num_a = random.randint(10, 50)
    num_b = random.randint(10, 50)
    op = random.choice(tuple(ops.keys()))

    print('{}{}{}=?'.format(num_a, op, num_b))
    expected_answer = ops[op](num_a, num_b)
    user_answer = int(input())
    if user_answer == expected_answer:
        print('Correct')
        print('It took you {0:0.1f} seconds to answer the 
question'.format(time.time() - start))
    else:
        print('Wrong')
        print('It took you {0:0.1f} seconds to answer the 
question'.format(time.time() - start))
    while user_answer == expected_answer:
        level2()
    else:
        exit()

level2()


def level3():

    import operator
    import random
    import time
    start = time.time()

    ops = {'+': operator.add,
           '-': operator.sub}

    num_a = random.randint(50, 100)
    num_b = random.randint(50, 100)
    op = random.choice(tuple(ops.keys()))

    print('{}{}{}=?'.format(num_a, op, num_b))
    expected_answer = ops[op](num_a, num_b)
    user_answer = int(input())
    if user_answer == expected_answer:
        print('Correct')
        print('It took you {0:0.1f} seconds to answer the 
question'.format(time.time() - start))
    else:
        print('Wrong')
        print('It took you {0:0.1f} seconds to answer the 
question'.format(time.time() - start))
    while user_answer == expected_answer:
        level3()
    else:
        exit()

level3()


def level4():

    import operator
    import random
    import time
    start = time.time()

    ops = {'+': operator.add,
           '-': operator.sub}

    num_a = random.randint(100, 1000)
    num_b = random.randint(100, 1000)
    op = random.choice(tuple(ops.keys()))

    print('{}{}{}=?'.format(num_a, op, num_b))
    expected_answer = ops[op](num_a, num_b)
    user_answer = int(input())
    if user_answer == expected_answer:
        print('Correct')
        print('It took you {0:0.1f} seconds to answer the 
question'.format(time.time() - start))
    else:
        print('Wrong')
        print('It took you {0:0.1f} seconds to answer the 
question'.format(time.time() - start))
    while user_answer == expected_answer:
        level4()
    else:
        exit()

level4()

Answer 1

In your if statement, you're using an input() method. It doesn't have to be there. Just write:

if userinput=="level1":
    level1()
elif userinput=="level2":
    level2()

etc. It's also better to use elif in stead of if .

Answer 2

You should define the function before using it. You are calling functions before they are defined.

Also the calls to them (eg level1() ) after them is not needed. You may also move the imports at the begging of the file, and remove them from each function. You may also use an IDE, for example PyCharm .

def level1():
    import operator
    import random
    import time
    start = time.time()

    ops = {'+': operator.add,
           '-': operator.sub}

    num_a = random.randint(1, 10)
    num_b = random.randint(1, 10)
    op = random.choice(tuple(ops.keys()))

    print('{}{}{}=?'.format(num_a, op, num_b))
    expected_answer = ops[op](num_a, num_b)
    user_answer = int(input())
    if user_answer == expected_answer:
        print('Correct')
        print('It took you {0:0.1f} seconds to answer the question'.format(time.time() - start))
    else:
        print('Wrong')
        print('It took you {0:0.1f} seconds to answer the question'.format(time.time() - start))
    while user_answer == expected_answer:
        level1()
    else:
        exit()


def level2():
    import operator
    import random
    import time
    start = time.time()

    ops = {'+': operator.add,
           '-': operator.sub}

    num_a = random.randint(10, 50)
    num_b = random.randint(10, 50)
    op = random.choice(tuple(ops.keys()))

    print('{}{}{}=?'.format(num_a, op, num_b))
    expected_answer = ops[op](num_a, num_b)
    user_answer = int(input())
    if user_answer == expected_answer:
        print('Correct')
        print('It took you {0:0.1f} seconds to answer the question'.format(time.time() - start))
    else:
        print('Wrong')
        print('It took you {0:0.1f} seconds to answer the question'.format(time.time() - start))
    while user_answer == expected_answer:
        level2()
    else:
        exit()


def level3():
    import operator
    import random
    import time
    start = time.time()

    ops = {'+': operator.add,
           '-': operator.sub}

    num_a = random.randint(50, 100)
    num_b = random.randint(50, 100)
    op = random.choice(tuple(ops.keys()))

    print('{}{}{}=?'.format(num_a, op, num_b))
    expected_answer = ops[op](num_a, num_b)
    user_answer = int(input())
    if user_answer == expected_answer:
        print('Correct')
        print('It took you {0:0.1f} seconds to answer the question'.format(time.time() - start))
    else:
        print('Wrong')
        print('It took you {0:0.1f} seconds to answer the question'.format(time.time() - start))
    while user_answer == expected_answer:
        level3()
    else:
        exit()


def level4():
    import operator
    import random
    import time
    start = time.time()

    ops = {'+': operator.add,
           '-': operator.sub}

    num_a = random.randint(100, 1000)
    num_b = random.randint(100, 1000)
    op = random.choice(tuple(ops.keys()))

    print('{}{}{}=?'.format(num_a, op, num_b))
    expected_answer = ops[op](num_a, num_b)
    user_answer = int(input())
    if user_answer == expected_answer:
        print('Correct')
        print('It took you {0:0.1f} seconds to answer the question'.format(time.time() - start))
    else:
        print('Wrong')
        print('It took you {0:0.1f} seconds to answer the question'.format(time.time() - start))
    while user_answer == expected_answer:
        level4()
    else:
        exit()


print("Welcome to the maths skills testing machine!")
_ = input("\nAre you ready to test your maths skills?")

print("\nWhich level would you like to play?")
userinput = input('''Level 1, Level 2, Level 3, Level 4''')

if userinput=="level1":
    level1()
elif userinput=="level2":
    level2()
elif userinput=="level3":
    level3()
elif userinput=="level4":
    level4()