如何向索引添加索引

Question

好的。这是我第一次问一个问题，所以请不要太复杂。我正在尝试设置我的Python程序，以便它包含三个不同类别的分数列表：测验，程序和测试，并将它们放入列表中。我的代码如下所示：

QUIZ_GRADES = int(input("How many quiz grades? ")) 

PROGRAM_GRADES = int(input("How many program grades? ")) 

TESTS = int(input("How many tests? ")) 

def main(): 

globalConstantList = [QUIZ_GRADES, PROGRAM_GRADES, TESTS] 

scoreList = [0] * (QUIZ_GRADES + PROGRAM_GRADES + TESTS) 

returnedScoresList = getGrades(globalConstantList,scoreList) 

#totalList(totalScore[scores]) 

#userOutput() 

print(returnedScoresList) 


def getGrades(globalConstantList,scoreList): 

    for eachScore in globalConstantList: 

    #totalScoreList = 0.0 

    index = 0 

     for index in range(QUIZ_GRADES): 

      print("What is the score for quiz", index + 1) 

      scoreList[index] = float(input()) 

     for index in range(PROGRAM_GRADES): 

      print("What is the score for program", index + 1) 

      scoreList[index] = float(input()) 

     for index in range(TESTS): 

      print("What is the score for test", index + 1) 

      scoreList[index] = float(input()) 

     return scoreList 


main() 

（很抱歉，如果一切都没有被放置在代码样品 - FYI语法是正确的。）

这里是我的问题：每次我跑我的代码，它会将我所有的QUIZ_GRADES值添加到从QUIZ_GRADES for循环的scoreList[]列表中，但随后当我运行PROGRAM_GRADES for-loop时，它将取出我的原始值（从QUIZ_GRADES）并放入PROGRAM_GRADES）。例如，如果我为我的测验分数输入99,98和97，为我的程序分数输入96，它将删除最初的99并放置在96中。是否有一种方法可以填写整个scoreList而不会擦除任何我的价值观？由于

Answer 1

我想你应该追加到列表：

scoreList.append(float(input())) 

在每个循环

，假设scoreList是空的功能启动时。因此，你的代码应该变成：

def main(): 
    globalConstantList = [QUIZ_GRADES, PROGRAM_GRADES, TESTS] 
    # scoreList = [0] * (QUIZ_GRADES + PROGRAM_GRADES + TESTS) 
    returnedScoresList = getGrades(globalConstantList) 
    #totalList(totalScore[scores]) 
    #userOutput() 
    print(returnedScoresList) 

def getGrades(globalConstantList): 
    scoreList = [] 
    for eachScore in globalConstantList: 
     #totalScoreList = 0.0 
     index = 0 
     for i in range(QUIZ_GRADES): 
      index += 1 
      print("What is the score for quiz", index) 
      scoreList.append(float(input())) 
     for i in range(PROGRAM_GRADES): 
      index += 1 
      print("What is the score for program", index) 
      scoreList.append(float(input())) 
     for i in range(TESTS): 
      index += 1 
      print("What is the score for test", index) 
      scoreList.append(float(input())) 
    return scoreList 

main() 

或者使用range()start和stop参数：

def main(): 
    globalConstantList = [QUIZ_GRADES, PROGRAM_GRADES, TESTS] 
    scoreList = [0] * (QUIZ_GRADES + PROGRAM_GRADES + TESTS) 
    returnedScoresList = getGrades(globalConstantList, scoreList) 
    #totalList(totalScore[scores]) 
    #userOutput() 
    print(returnedScoresList) 

def getGrades(globalConstantList, scoreList): 
    for eachScore in globalConstantList: 
     #totalScoreList = 0.0 
     #index = 0 <-- not needed 
     for index in range(QUIZ_GRADES): 
      print("What is the score for quiz", index + 1) 
      scoreList[index] = float(input()) 
     imin = QUIZ_GRADES 
     for index in range(imin, PROGRAM_GRADES + imin): 
      print("What is the score for program", index + 1) 
      scoreList[index] = float(input()) 
     imin += PROGRAM_GRADES 
     for index in range(imin, TESTS + imin): 
      print("What is the score for test", index + 1) 
      scoreList[index] = float(input()) 
    return scoreList 

main() 

Answer 2

你可能想写

for index in range(QUIZ_GRADES): 
    index+=1 
    print("What is the score for quiz", index) 
    scoreList[index] = float(input()) 

和类似的其他for循环。该print（..，index + 1）不会增加索引，并且在每个循环索引中从0开始。因此，在每个for循环的开始处，scoreList [index]评估为scoreList [0]，并且它会覆盖您插入的内容在之前的循环中。

注意有更优雅的方法来编码。还检查append（）方法