def main():
Numberofstudents=eval(input("How many students will enter grades today? "))
Name=input("What is your frist and last name? ")
numberofgrades=eval(input("How many grades do you want to enter? "))
gradecount=0
studentcount=1
lowestgradelisty=[]
while studentcount<=Numberofstudents:
    gradetotal=0
    while gradecount<numberofgrades:
        gradeforlisty=eval(input("Enter grade please: "))
        gradetotal=gradetotal+gradeforlisty
        gradecount=gradecount+1
        Numberofstudents=Numberofstudents-1
        studentcount=studentcount+1
        lowestgradelisty.extend(gradeforlisty)
        min(lowestgradelisty.extend(gradeforlisty))
        Drop=(min(lowestgradelisty.extend(gradeforlisty))), "is your lowest grade. do you want to drop it? Enter as yes or no: "
        if (Drop=="yes"):
            print(Name, "The new total of your grades is", gradetotal-min(lowestgradelisty.append(gradeforlisty)/gradecount))
        elif (Drop=="no"):
            print("the averages of the grades enetered is", gradetotal/gradecount)
    print(Name, "The average of the grades entered for is", gradetotal/gradecount)
    gradecount=0
    studentcount=1