1
평균에 대해 정수 이외의 입력을 방지하려고 시도하지만 TypeError에 대한 Traceback을 계속 수신합니다. 다음은 내 프로그램이며,이 프로그램의 출력은 평균에 대한 INT 이외의 입력 아무것도 시도 할 때 :Python - TypeError : 'NoneType'객체가 반복 가능하지 않습니다.
grades_file = open('grades.txt', 'w')
def get_averages():
student = 1
for i in range(3):
name, average = get_name_average()
student += 1
grades_file = open('grades.txt', 'a')
grades_file.write("Student Name: " + name + '\n' + "Student Average: " + str(average) + '\n\n')
grades_file.close()
print(("Added %s's average of %i to the file 'grades.txt. You are now entering information for student %i of 12.") % (name, average, student))
def get_name_average():
student_name = input("Please enter the student's name: ")
try:
student_average = int(input(("Please enter the average for %s: ") % student_name))
verified_average = check_grade_input(student_average)
return student_name, verified_average
except ValueError:
print("ERROR!! Please enter grade value as an integer!")
except TypeError:
print('Type error too!')
def check_grade_input(average):
legal_input = False
while not legal_input:
if (average < 0):
print("Nah bro, invalid number...")
average = int(input("Please enter another average that is above 0: "))
elif (average > 100):
print("Nah bro, invalid number...")
average = int(input("Please enter another average that is below 100: "))
else:
return average
def show_grades_file():
grades_file = open('grades.txt', 'r')
grade_contents = grades_file.read()
grades_file.close()
print("\nThe information you entered for into file 'grades.txt' is:\n\n" + grade_contents)
def main():
get_averages()
show_grades_file()
main()
역 추적 및 입력 :
당신이 메시지를 인쇄 한 get_name_average 기능에Please enter the student's name: Aaron
Please enter the average for Aaron: as
ERROR!! Please enter grade value as an integer!
Traceback (most recent call last):
File "Documents/ProgrammingFundamentals/Lab6/aaron_blakey_Lab6b.py", line 52, in <module>
main()
File "Documents/ProgrammingFundamentals/Lab6/aaron_blakey_Lab6b.py", line 49, in main
get_averages()
File "Documents/ProgrammingFundamentals/Lab6/aaron_blakey_Lab6b.py", line 13, in get_averages
name, average = get_name_average()
TypeError: 'NoneType' object is not iterable
감사합니다. – Ablakey