リストオブジェクトに自己定義クラスのメソッドのAttributeErrorがあります

Question

私は加重平均を計算しようとしています。私たちはOOPを始めたばかりで、私の問題がそのリストにあるのかどうかは分かりません。

はここに私のコードである：（）主は、私のクラスのコードをテストする手段として定義される

class WeightedAverage: 
    """ Class to compute weighted averages. """ 

    def __init__(self): 
     """ Creates empty lists. """ 
     scoresList = [] 
     weightsList = [] 

    def addScore(self,score,weight): 
     scoreBool = checkScore(score) 
     weightBool = checkWeight(weight) 

     if scoreBool == True and weightBool == True: 
      scoresList.append(score) 
      weightsList.append(weight) 


    def checkScore(scr): 
     if scr in range(1,10): 
      scrBl = True 
     else: 
      scrBl = False 
     return scrBl 


    def checkWeight(wgt): 
     if wgt in [0.5,1,1.5,2]: 
      wgtBl = True 
     else: 
      wgtBl = False 
     return wgtBl 


    def getScores(self,scoresList): 
     return scoresList 

    def getWeights(self,weightsList): 
     return weightsList 

    def getWAvg(self,scoresList,weightsList): 
     wAvg = [scoresList*weightsList for scoresList,weightsList in zip(scoresList,weightsList)] 
     return wAvg 


# For testing 
def main(): 
    scoresData = [1.5,3,9.2] 
    weightsData = [0.5,2,1] 

    wAvg = scoresData.getWAvg(scoresData,weightsData) 
    print(wAvg) # should display 15.95/3 

。

私はmain（）の実行すると、私は以下のトレースバックを得る：

Traceback (most recent call last): 
    File "H:\WeightAverages.py", line 58, in <module> 
    main() 
    File "H:\WeightAverages.py", line 54, in main 
    wAvg = scoresData.getWAvg(scoresData,weightsData) 
AttributeError: 'list' object has no attribute 'getWAvg' 

が、これは私のクラスの問題ですか、それだけでリストの問題ですか？これはOOコードを書くのは初めてのことですので、これが正しいかどうかは完全にはわかりません！

Answer 1

あなたはこの

class WeightedAverage(object): 
""" Class to compute weighted averages. """ 

    def __init__(self): 
     """ Creates empty lists. """ 
     scoresList = [] 
     weightsList = [] 

    def addScore(self,score,weight): 
     scoreBool = checkScore(score) 
     weightBool = checkWeight(weight) 

     if scoreBool == True and weightBool == True: 
      scoresList.append(score) 
      weightsList.append(weight) 


    def checkScore(scr): 
     if scr in range(1,10): 
      scrBl = True 
     else: 
      scrBl = False 
     return scrBl 


    def checkWeight(wgt): 
     if wgt in [0.5,1,1.5,2]: 
      wgtBl = True 
     else: 
      wgtBl = False 
     return wgtBl 


    def getScores(self,scoresList): 
     return scoresList 

    def getWeights(self,weightsList): 
     return weightsList 

    def getWAvg(self,scoresList,weightsList): 
     wAvg = [scoresList*weightsList for scoresList,weightsList in zip(scoresList,weightsList)] 
     return wAvg 


# For testing 
def main(): 
    scoresData = [1.5,3,9.2] 
    weightsData = [0.5,2,1] 
    obj = WeightedAverage() 
    wAvg = obj.getWAvg(scoresData,weightsData) 
    print(wAvg) 

Answer 2

ManojさんJadhavさんのコメントが正しいように思わ行う必要があります。 getWAvg関数を呼び出すには、WeightedAverageクラスのインスタンスを作成する必要があります。

インスタンスが作成され、getWavg関数の呼び出しに使用されるコードのバージョンです。また、私はgetWAvgを変更しました。

class WeightedAverage: 
    """ Class to compute weighted averages. """ 

    def __init__(self): 
     """ Creates empty lists. """ 
     scoresList = [] 
     weightsList = [] 

    def addScore(self,score,weight): 
     scoreBool = checkScore(score) 
     weightBool = checkWeight(weight) 

     if scoreBool == True and weightBool == True: 
      scoresList.append(score) 
      weightsList.append(weight) 


    def checkScore(scr): 
     if scr in range(1,10): 
      scrBl = True 
     else: 
      scrBl = False 
     return scrBl 


    def checkWeight(wgt): 
     if wgt in [0.5,1,1.5,2]: 
      wgtBl = True 
     else: 
      wgtBl = False 
     return wgtBl 


    def getScores(self,scoresList): 
     return scoresList 

    def getWeights(self,weightsList): 
     return weightsList 

    def getWAvg(self,scoresList,weightsList): 
     wAvg = sum([s*w for s,w in zip(scoresList,weightsList)])/len(scoresList) 
     return wAvg 


# For testing 
def main(): 
    scoresData = [1.5,3,9.2] 
    weightsData = [0.5,2,1] 

    instance = WeightedAverage() 
    wAvg = instance.getWAvg(scoresData,weightsData) 

    print(wAvg) # should display 15.95/3