https://github.com/faraazarsath/guvi-task1

This Python script provides a simple user registration system with username and password validation using regular expressions. It also includes a password recovery option.
https://github.com/faraazarsath/guvi-task1

filehandling if-else python regular-expression

Last synced: 26 days ago
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This Python script provides a simple user registration system with username and password validation using regular expressions. It also includes a password recovery option.

• Host: GitHub
• URL: https://github.com/faraazarsath/guvi-task1
• Owner: FaraazArsath
• Created: 2022-07-29T18:34:45.000Z (over 2 years ago)
• Default Branch: main
• Last Pushed: 2023-10-18T17:06:58.000Z (over 1 year ago)
• Last Synced: 2023-10-18T18:25:40.228Z (over 1 year ago)
• Topics: filehandling, if-else, python, regular-expression
• Language: Jupyter Notebook
• Homepage:
• Size: 10.7 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
GUVI - Assignment 1                                                       

# User Login Python Program

A simple Python program that allows users to register, login, and recover forgotten passwords using regular expressions for input validation.

## Features

User Registration: Allows users to create a username and password. Validates username and password based on specified criteria.

User Login: Allows existing users to log in with their username and password.

Password Recovery: Enables users to recover their password by providing their username.

## Functions

register()

Allows users to create a username. Validates the username using a regular expression for email-like formats.

passwd()

Prompts the user to create a password. Enforces criteria like at least one lowercase, one uppercase, one digit, and one special character.

forgetpassword()

Initiates the password recovery process. Prompts for a username and checks if it exists in the database.

## Regular Expressions

Username: r'^[a-zA-Z]+[\._]?[a-zA-z 0-9]+[@]\w+[.]\w{2,3}$'

Password: r"^(?=.*?[a-z])(?=.*?[A-Z])(?=.*?[0-9])(?=.*?[!@#])"

## Note

User data is stored in a file named database.txt.