python - 在 Google App Engine 中使用自制函数

Question

我正在尝试制作一个检查用户是否已登录的函数。我将该函数放在主页类之外，并且在我尝试在 def get(self) 中使用它之前它不会出错主页类。该函数如下所示:

def LoginCheck():
username = self.request.cookies.get('username') 
password = self.request.cookies.get('password')
if username and password:
    checkq = db.GqlQuery("SELECT * FROM Users WHERE username = :1 AND password = :2", username, password)
    checkresult = checkq.get()
    if checkresult is None:
        self.redirect("/wrong")
else:
    self.redirect("/wrong2")

当我尝试使用它时，它返回:

line 14, in LoginCheck
    username = self.request.cookies.get('username')
NameError: global name 'self' is not defined

我做错了什么？

Answer 1

您必须将“self”添加到您的函数定义中。参见 section 9.3.2 of python's tutorial .

def LoginCheck(self):
    username = self.request.cookies.get('username') 
    password = self.request.cookies.get('password')
    if username and password:
        checkq = db.GqlQuery("SELECT * FROM Users WHERE username = :1 AND password = :2", username, password)
        checkresult = checkq.get()
        if checkresult is None:
            self.redirect("/wrong")
    else:
        self.redirect("/wrong2")