因此，我嘗試使用 Python3 在終端中編寫登錄對(duì)話，但由于某種原因，此代碼：def start(): login_signin_Confirmation = input("Welcome! Do you wish to log-in to your account or sign up to this platform? \n") if login_signin_Confirmation == "login": login() else: signup() start()def login(): login_username = input("Great! start by typing in your username.") if login_username in users: print("Welcome Back, {login_username}")login()提示我此錯(cuò)誤消息：Welcome! Do you wish to log-in to your account or sign up to this platform? loginTraceback (most recent call last): File "login.py", line 22, in <module> start() File "login.py", line 19, in start login()NameError: name 'login' is not defined剛開始一些我不太確定我做錯(cuò)了什么，而且我找不到有同樣問(wèn)題的人......
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天涯盡頭無(wú)女友
TA貢獻(xiàn)1831條經(jīng)驗(yàn) 獲得超9個(gè)贊
正如其他人指出的，您需要首先定義，然后調(diào)用函數(shù)：
# imports first
# now definitions of functions
def start():
login_signin_Confirmation = input("Welcome! Do you wish to log-in to your account or sign up to this platform? \n")
if login_signin_Confirmation == "login":
login()
else:
signup()
def signup():
pass
def login():
login_username = input("Great! start by typing in your username.")
if login_username in users:
print("Welcome Back, {login_username}")
# main
def main():
start()
# guard multiprocess context
if __name__ == '__main__':
main()
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