Creating secure passwords is essential in today’s digital world. Whether you are building a login system or simply want to generate strong passwords for personal use, knowing how to automate password creation using Python is extremely valuable.
In this tutorial, we will break down a simple yet powerful Python Password Generator that uses letters, numbers, and symbols to create a randomized, secure password.
Why Build a Password Generator?
Weak passwords are the easiest target for hackers. A strong password must include:
- Uppercase and lowercase letters
- Numbers
- Special characters
- A random order
The Python script below covers all these requirements. Let’s explore how it works.
Complete Python Password Generator Code
import random
letters = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
'w', 'x', 'y', 'z',
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V',
'W', 'X', 'Y', 'Z']
numbers = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9']
symbols = ['!', '#', '$', '%', '&', '(', ')', '*', '+']
p_l = int(input("How many letters you want in your password?\n"))
p_n = int(input("How many numbers you want in your password?\n"))
p_s = int(input("How many symbols you want in your password?\n"))
password = []
for _ in range(p_l):
password.append(random.choice(letters))
for _ in range(p_n):
password.append(random.choice(numbers))
for _ in range(p_s):
password.append(random.choice(symbols))
random.shuffle(password)
shuffl_password = ""
for new_p in password:
shuffl_password = shuffl_password + new_p
print(f"Your password is: {shuffl_password}")
Step-by-Step Explanation
1. Importing the Random Module
import randomThe random module allows us to randomly pick characters and shuffle them, ensuring every password is unpredictable.
2. Creating Lists of Characters
You created three lists:
letters→ A–Z and a–znumbers→ Digits 0–9symbols→ Special characters (!, #, %, &, etc.)
These lists act as a pool from which Python will pick characters.
3. Taking User Input
p_l = int(input("How many letters you want in your password?\n"))
p_n = int(input("How many numbers you want in your password?\n"))
p_s = int(input("How many symbols you want in your password?\n"))The user decides how long the password should be and how many types of characters it must include.
4. Adding Random Characters to the Password
The script uses three loops:
for _ in range(p_l):
password.append(random.choice(letters))This loop selects random letters and appends them to the password list.
The same logic is used for numbers and symbols.
5. Shuffling to Increase Randomness
random.shuffle(password)This ensures the final password is not predictable—for example, letters first, then numbers. Everything gets mixed.
6. Joining the Final Password
shuffl_password = ""
for new_p in password:
shuffl_password = shuffl_password + new_pThe characters stored in the list are combined into a single string, creating your final password.
Final Output
Your password is: W9$k3P&f2+Every time you run the program, you get a brand-new, highly secure password.
Conclusion
This Python Password Generator is a simple yet powerful project for beginners. You learned how to work with lists, loops, random modules, and string manipulation. You can expand this program further by:
- Adding password length validation
- Allowing automatic password strength rating
- Saving passwords securely using hashing
Python makes such tasks both fun and practical.
If you’re excited to continue your Python learning journey, there’s a great next step waiting for you. After experimenting with this password generator, you can dive into a hands-on tutorial that shows how to scrape movie transcripts automatically using Python and BeautifulSoup. It’s practical, beginner-friendly, and helps you understand how real-world data extraction works.
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