我需要以某種方式訪問類字典并使用 removeClass() 函數將其刪除，但不確定如何在其中傳遞類。如果選擇了第2個選項，則該程序應從字典中從字典中刪除類。我不知道在這里做什么。def prompt(): print('MENU') print('1 --> Add classes.') print('2 --> Remove classes.') print('3 --> View course details.') print('4 --> View schedule.') print('5 --> Quit.') option = int(input('What would you like to choose? ')) while option < 1 or option > 5: option = int(input('Please enter a valid numerical option: ')) return optiondef checkOption(option): if option == 1: courseCount = 0 courseCount = courseCounter() classes = addClasses(courseCount) elif option == 2: removeClasses(courses) elif option == 3: viewCourseDetails() elif option == 4: viewSchedule()def courseCounter(): courseCount = input('Enter a numerical value of courses only (up to 4): ') while courseCount.isnumeric() == False: courseCount = input('Enter a NUMERICAL value of courses only (up to 4): ') return int(courseCount)def addClasses(courseCount): classes = {} i = 1 while i <= courseCount: courseName = input('Enter a course name: ') classes[courseName] = {} classes[courseName]['Room Number'] = input('Enter a room number: ') classes[courseName]['Instructor'] = input('Enter a instructor: ') classes[courseName]['Meeting time'] = input('Enter a meeting time: ') i = i + 1 return classesdef removeClasses(*****): courseName = input('Enter the class you would like to remove: ') if ***** in classes: del classes[courseName] print(classes)def main(): option = prompt() checkOption(option) while option > 1 or option < 5: if option == 5: break option = prompt() checkOption(option)main()
2 回答
犯罪嫌疑人X
TA貢獻2080條經驗 獲得超4個贊
我能想到的最簡單的方法如下。我修改了你的 2 個函數，并將“類”設為全局。
classes = {}
def checkOption(option):
global classes
if option == 1:
courseCount = courseCounter()
classes = addClasses(courseCount)
elif option == 2:
removeClasses()
elif option == 3:
viewCourseDetails()
elif option == 4:
viewSchedule()
def removeClasses():
courseName = input('Enter the class you would like to remove: ')
if courseName in classes:
del classes[courseName]
print(classes)
我希望這可以幫助你。
守著星空守著你
TA貢獻1799條經驗 獲得超8個贊
通過 globals() 變量，以便您可以跨函數傳遞它：
def prompt():
print('MENU')
print('1 --> Add classes.')
print('2 --> Remove classes.')
print('3 --> View course details.')
print('4 --> View schedule.')
print('5 --> Quit.')
option = int(input('What would you like to choose? '))
while option < 1 or option > 5:
option = int(input('Please enter a valid numerical option: '))
return option
def checkOption(option):
if option == 1:
courseCount = 0
courseCount = courseCounter()
classes = addClasses(courseCount)
elif option == 2 :
if 'classes' in globals() :
removeClasses(globals()['classes'])
else :
print("Insert a class before!")
checkOption(1)
elif option == 3:
viewCourseDetails()
elif option == 4:
viewSchedule()
def courseCounter():
courseCount = input('Enter a numerical value of courses only (up to 4): ')
while courseCount.isnumeric() == False:
courseCount = input('Enter a NUMERICAL value of courses only (up to 4): ')
return int(courseCount)
def addClasses(courseCount):
classes = {}
i = 1
while i <= courseCount:
courseName = input('Enter a course name: ')
classes[courseName] = {}
classes[courseName]['Room Number'] = input('Enter a room number: ')
classes[courseName]['Instructor'] = input('Enter a instructor: ')
classes[courseName]['Meeting time'] = input('Enter a meeting time: ')
i = i + 1
globals()[ 'classes' ] = classes
return classes
def removeClasses(classes):
courseName = input('Enter the class you would like to remove: ')
if courseName in classes:
del classes[courseName]
print(classes)
def main():
option = prompt()
checkOption(option)
while option > 1 or option < 5:
if option == 5:
break
option = prompt()
checkOption(option)
main()
這適用于我的機器。這也檢查類的存在或重定向用戶來定義類。
注意 globals() 的行為（例如，為什么全局變量是邪惡的？）。否則，您可以定義一個對象（一個空字典）并通過函數傳遞它，填充它或檢查它是否為空，這可能更安全。
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