Python 计算文件中数字的平均值 (Pearson Revel)

Question

I am working on a homework question, and I don't understand how to solve it. The question is:

Assume that a file containing a series of integers is named numbers.txt. Write a program that calculates the average of all the numbers stored in the file.

I tried:

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()

Any help would be greatly appreciated!

*I fix my typo, but there is still a logic error

Answer 1

You spelled "numberOfLines" wrong in your else statement LOL:

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()