您可以将变量添加到字典中吗

Question

I would like to add a shelf to a program and can't seem to add two variables to the dictionary. For example, a username and password that the user inputs. Is this possible? And if so, how could I link them to each other?

details=shelve.open['user_details']
details['Name']=username
details['Password']=password

So when the user wants to log in I can check if their details are matching, along the lines of:

if username and password in details:
    user is logged in

Answer 1

username and password in details: is not really a proper boolean statement, at least it won't do what you think that does. You are asking if the variable username contains a true value and the value of the variable password is a member of details . Since details is a dictionary, you are asking if the value is a key in the dictionary.

I suspect you want to test if the current username and password stored in the shelve dictionary are equal to the values entered by the user. In that case test against the values:

if details['Name'] == username and details['Password'] == password:
    # Username and password are correct, user is logged in.