How to import from a file a class that will later be defined

Question

I'm working on a simple "sign in " "sign up" program, and the idea is that the user inputs a username and a password and they get saved in a python file named Database. And the sign in process works the same, but I'm stuck in the step where the program should import a class named after the username that has the password in it, and to import this class the user should input its name (username) so at first it will be just a variable and later it will be defined. I'm still a beginner in python and this is my idea as a code:

#This is the file named Database class Username: password = ["Mypassword"]

#This is the sign in program user = input("enter your username:\n") with open('Database.py') as file: content = file.read() if user in content: from Database import user else: print("this username is not in the database")

in the console it shows that "user" is not defined because it's a variable, so is there any other way to achieve the same goal with another function or something. This is the best I can think of as a beginner perhaps if someone has a better idea let me know please.

The way you use the word import makes it sound like it means something different to you than it does to python. Please update your knowledge by referring to the documentation or some tutorials. — quamrana
– quamrana, Commented Aug 23, 2022 at 11:36

jokkk2312 · Accepted Answer · 2022-08-23 11:38:32Z

If saving a name and password, you got to save it to a file/database and not a python script. For instance users.txt.
Check the basic use of classes in python and method manipulation and how to instantiate an object https://www.geeksforgeeks.org/python-classes-and-objects/

I suggest having class User, which saves name and password in a txt file once the object has been created. It opens .txt file, adds a line, and closes it. After that in the main function you can open the txt file and iterate through as many times as you want and check if it contains a certain user. Hope it helps.

PanosoikoGr · Accepted Answer · 2022-08-23 11:44:46Z

So if i understand correctly there is no user in the Database file. There are one way of solving the problem that i can think of learn some pandas(its module) and create a table with unsernames and passwords(its gona be 10 times easier than what you trying to do)

AND

As @jokkk2312 dont read a python file you can create a text file that will save the username and password as one(e.x username:panos password:123 in the file save it as one string: panos123 and put \n so it changes row every time.) After that make a program that ask you for your user name and password and combines them to a single string. You take than string and search the hole file for the same string....

If you want me to create a code example add a comment to this post and i will make one...

Collectives™ on Stack Overflow

How to import from a file a class that will later be defined

2 Answers 2

Comments

1 Comment

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

1 Comment

Related