Python 计算文件中数字的平均值 (Pearson Revel)

Question

我正在做一个家庭作业问题，我不明白如何解决它。 问题是：

假设包含一系列整数的文件名为 numbers.txt。 编写一个程序来计算存储在文件中的所有数字的平均值。

我试过了：

def main():
    try: 
        numbersFile = open ("numbers.txt","r")
    except IOError as errorGenerated: 
        print("File not found:",errorGenerated)
    else: 
        total = 0
        numberOfLines = 0
        line = numbersFile.readline()
        
        while line != "":
            numberOfLines += 1
            total += int(line)
            line = numbersFile.readline()
            
        average = total/numberOfLines
main()

任何帮助将不胜感激！

*我修正了我的错字，但仍然存在逻辑错误

Answer 1

你在else语句中拼错了“numberOfLines”，哈哈：

def main():
    try: 
        numbersFile = open ("numbers.txt","r")
    except IOError as errorGenerated: 
        print("File not found:",errorGenerated)
    else: 
        total = 0
        numberOfLines = 0 #here
        line = numbersFile.readline()
        
        while line != "":
            numberOfLines += 1
            total += int(line)
            line = numbersFile.readline()
            
        average = total/numberOfLines  
        #make sure you print the output!
        print(average)

main()