为什么我的代码一直重复问题提示，而不是继续执行条件语句？

Question

当我运行我的代码时，即使当输入匹配条件语句时，它也会在while循环开始时继续迭代。当我输入"y“时，它会重复与输入"l”或输入"e“相同的问题提示。

intro = "Welcome to the leap year Calculator\n"
print(intro)
leapyear = True
def leap_year_calc():
    test= input("What year are you checking? ")
    year = int(test)
    if ((year % 4 == 0) and (year % 100 != 0)) or (year % 400 == 0):
       prompt = str(year) + " Is a leap year"
       print (prompt)
       return leapyear == True
    else:
       prompt = str(year) + " Isn't a leap year"
       print (prompt)
       return leapyear == True
def leap_year_list():
    leap_years = []
    for i in range(4001):
        if i >= 1752: #this was the 1st leap year in th Gregorian calender
            if ((i % 4 == 0) and (i % 100 != 0)) or (i % 400 == 0):
                leap_years.append(i)
        else:
           pass
    print(leap_years)
    return leap_years

while leapyear != False:
     question = input("Do you want to know if a year is a leap year(type 'y'), \nor see a list of leap years(type 'l') or exit (type 'e'? ").lower
     if question == 'y':
        leap_year_calc()
     elif question == 'l':
        leap_year_list()
     else:
        leapyear == False

#leap_year_calc()
#leap_year_list()

Answer 1

您在lower函数中缺少()：

question = input("Do you want to know if a year is a leap year(type 'y'), \nor see a list of leap years(type 'l') or exit (type 'e'? ").lower()

Answer 2

而不是做：

while leapyear != False:
      question = input("Do you want to know if a year is a leap year(type 'y'), \nor see a list of leap years(type 'l') or exit (type 'e'? ").lower
      if question == 'y':
        leap_year_calc()
      elif question == 'l':
        leap_year_list()

执行以下操作：

while leapyear:
      question = input("Do you want to know if a year is a leap year(type 'y'), \nor see a list of leap years(type 'l') or exit (type 'e'? ").lower
      if question == 'y':
        leap_year_calc()
      elif question == 'l':
        leap_year_list()
      else:
        leapyear = False