평균매출구하기(파일열기 모듈, strip, split 함수)

with open('data/chicken.txt','r') as f:
    margin = {}
    for line in f:
        margin_list = line.strip().split(': ')
        margin[margin_list[0]] = margin_list[1]
    total_margin = 0
    avg_margin = 0
    cnt = 0
    for i in margin.keys():
        total_margin += int(margin[i])
        cnt+=1
    print(total_margin/cnt)

모범 답안

with open('data/chicken.txt', 'r') as f:
    total_revenue = 0
    total_days = 0
    
    for line in f:
        data = line.strip().split(": ")
        revenue = int(data[1])  # 그날의 매출

        total_revenue += revenue
        total_days += 1

    print(total_revenue / total_days)