Resetting Password Using Python

Last Updated : 24 Apr, 2025

In this discussion, we explore creating a robust Python password reset tool using the regex library. We define a specific pattern for the password format, enhancing security. The tool incorporates parameters ensuring passwords meet criteria like uppercase/lowercase letters, digits, and special characters. It strategically uses Python libraries, such as getpass for secure input and time for a delay, adding security, and improving user experience. The article provides a step-by-step process, offering insights into each development stage. By the end, you'll not only have a functional password reset tool but also a deep understanding of Python's libraries and regex for secure password management.

Reset Password Using Python

Follow the steps below to reset a password using Python.

Step 1: Install Necessary libraries

In this step, we are going to install getpass and regex library.

pip install getpass4

Step 2: Import Libraries

In this step will be importing all the required libraries in our Python program.

Python3

import re import time from getpass import getpass

Step 3: Create a Pattern For Your Password Using Regex

In this step we will be creating a pattern for the password to be entered by the user. We be following some basic case for password such as

A password must starts with capital letter.
A password must contains a digit, a special character.
It must be at least 8 characters long.

Breakdown of the pattern

(?=.*[a-z]|[A-Z]) this will check if it contains a letter or not.
(?=.*\d) this will check for digit.
(?=.*[!@#$%^&*()_+{}|:<>?/~`]) this will check for special character.
[A-Za-z\d!@#$%^&*()_+{}|:<>?/~`]{8,} this will check for length.

Python3

#create a pattern for your desired paasword type pattern = re.compile(r'^(?=.*[a-z]|[A-Z])(?=.*\d)(?=.*[!@#$%^&*()_+{}|:<>?/~`])[A-Za-z\d!@#$%^&*()_+{}|:<>?/~`]{8,}$')  def check(password):     if bool(pattern.match(password)) and password[0].isupper():         return True     return False

Step 4: Create a Log in Method

In this step we will create a logged-In method that will be log us in our website or app after successfully resetting the password.

Python3

def loggedIn(): #Login to the wesbiste/App time.sleep(5) print("Logged in Sucessfully.........")

Step 5: Create a Main Method

In this step, we'll establish the main method responsible for receiving user input and validating specified conditions. Let's examine the code implementation. Within this step, the check() method is invoked, verifying the basic measures prompted to the user during password entry. Additionally, we prompt the user to input the password twice, allowing for correction of any typing errors unnoticed during the initial entry. This step encompasses the invocation of all the previously created methods.

Python3

def main():     print("Entered password must:-")     print(" -Starts with Capital Letter")     print(" -conatins a digit and special character")     print(" -at least 8 characters long")          password1 = getpass("Enter the Password: ")      if check(password1)==False:         print("Enter a vaild password")     else :         password2 = getpass("Enter the Password again: ")          if password1 == password2:             print("Successfully changed password")             loggedIn()         else :           print("You entered a differnt password")  if __name__ == '__main__':     main()

Complete Code

Python3

import re import time from getpass import getpass  #create a pattern for your desired paasword type pattern = re.compile(r'^(?=.*[a-z]|[A-Z])(?=.*\d)(?=.*[!@#$%^&*()_+{}|:<>?/~`])[A-Za-z\d!@#$%^&*()_+{}|:<>?/~`]{8,}$')  def check(password):     if bool(pattern.match(password)) and password[0].isupper():         return True     return False  def loggedIn():     #Login to the wesbiste/App      time.sleep(5)     print("Logged in Sucessfully")  def main():     print("Entered password must:-")     print(" -Starts with Capital Letter")     print(" -conatins a digit and special character")     print(" -at least 8 characters long\n")          password1 = getpass("Enter the Password: ")      if check(password1)==False:         print("Enter a vaild password")     else :         password2 = getpass("Enter the Password again: ")          if password1 == password2:             print("Successfully changed password")             loggedIn()         else :           print("You entered a differnt password")  if __name__ == '__main__':   main()

Output :

Categorize Password as Strong or Weak using Regex in Python

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Resetting Password Using Python

Reset Password Using Python

Step 1: Install Necessary libraries

Step 2: Import Libraries

Step 3: Create a Pattern For Your Password Using Regex

Step 4: Create a Log in Method

Step 5: Create a Main Method

Complete Code

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