请问这个怎么做？输出要和示例格式一致????

def printF():
    scores=(77,65,95,90,66,88,62,72,89,90,92,85,98,65,74,71,95,77,96,84)
    you,liang,zhong,ji=0,0,0,0
    for i in scores:
        print("成绩："+str(i))
        if i>=90:
            you+=1
        elif i>=80:
            liang+=1
        elif i>=70:
            zhong+=1
        elif i>=60:
            ji+=1
    print("{'优':"+str(you)+",'良':"+str(liang)+",'中':"+str(zhong)+",'及':"+str(ji)+"}")