python - python 3 TypeError : '>' not supported between instances of 'int' and 'str' in an if statment

Question

Q_1 = input ('Name the organelles where protiens are synthesised? : ')
if Q_1 == 'ribosome':
    print ('correct')
    score = score + 1
else:
    print ('WRONG')

Q_2 = input ('Suggest why plant cells have a cell wall and animal cells don\'t ?: ')
if Q_2 == 'To control the flow of water and oxygen':
    print ('correct')
    score = score + 1

else:
    print ('WRONG')
    score = score -1

Q_3 = input ('True or false is bacteria an examples of a prokaryotic cell ?: ')
if Q_3 == 'true':
    print ('correct')
    score = score + 1

else:
    print ('WRONG')
    score = score -1

Q_4 = input ('True or false prokaryotes don\'t have a cell wall ?: ')
if Q_4 == 'true':
    print ('correct')
    score = score + 1

else:
    print ('WRONG')
    score = score -1

Q_5= input ('What is a stem cell?: ')
if Q_5 == 'An undifined cell':
    print ('correct')
    score = score + 1

else:
    print ('WRONG')
    score = score -1

Q_6 = input ('True or false there are embryonic stem cells?: ')
if Q_6 == 'true':
    print ('correct')
    score = score + 1

else:
    print ('WRONG')
    score = score -1

Q_7 = input ('What is diffusion?: ')
if Q_7 == 'The movment of gas particles from an area of high concentraction to low concentration':
    print ('correct')
    score = score + 1

else:
    print ('WRONG')
    score = score -1

Q_8 = input ('True or false having a greater surface area increase the rate of diffusion?: ')
if Q_8 == 'true':
    print ('correct')
    score = score + 1

else:
    print ('WRONG')
    score = score -1

Q_9 = input ('Define osmosis ?: ')
if Q_9 == 'The movment of water particles from an area of high to low concentration':
    print ('correct')
    score = score + 1

else:
    print ('WRONG')
    score = score -1


Q_10 = input ('True or false increasing temperature increases the rate of osmosis?: ')

if Q_10 == 'true':
    print ('correct')
    score = score + 1

else:
    print ('WRONG')
    score = score -1
int_score = int(score)

if int_score >'0':
    score = 0
    print (score)

这是我正在从事的GCSE生物学测验。
如果分数变为负数，我想将分数设置为0。

Answer 1

据我所知，变量int_score建议它包含一个整数，并在您的if语句中编写:

if int_score < '0':
    ...

在这种情况下， 0是一个字符串。您需要将其写为int以便可以进行比较:

if int_score < 0:
    ...

附带说明一下，我是否建议您检查正确答案的算法不是最佳算法，因为您必须输入准确答案才能正确回答。您可能要检查像这样的关键字:

假设答案是 photosynthesis produces glucose and oxygen，检查“葡萄糖”和“氧气”:

ans = input('what are the products of photosynthesis')
words = ans.split()
if all(word in words for word in ('glucose', 'oxygen')):
    print('correct!')
    score += 1
else:
    print('wrong!')