Install Passlib in Python Step by Step

Passlib is a popular Python library for password hashing. It supports many secure algorithms. This guide will help you install it easily.

Prerequisites

Before installing Passlib, ensure you have Python installed. You can check by running python --version in your terminal.

 
python --version

Python 3.9.7

If you get a ModuleNotFoundError, check our guide on solving Python module errors.

Step 1: Install Passlib Using pip

The easiest way to install Passlib is via pip. Open your terminal and run the following command.

 
pip install passlib

Successfully installed passlib-1.7.4

This will download and install the latest version of Passlib.

Step 2: Verify the Installation

After installation, verify it works. Open a Python shell and try importing Passlib.

 
import passlib
print(passlib.__version__)

1.7.4

If no errors appear, Passlib is installed correctly.

Step 3: Basic Usage Example

Here's a simple example to hash a password using Passlib's pbkdf2_sha256 algorithm.

 
from passlib.hash import pbkdf2_sha256

# Hash a password
hashed_password = pbkdf2_sha256.hash("mysecurepassword")
print(hashed_password)

$pbkdf2-sha256$29000$N2YMIWQsBWBMae09x1jrPQ$1t8iyB2A.WF/Z5JZv.lfCIhXXN33N3OSjQ5GBXZZUTk

The output is a secure hash of your password. Store this in your database.

Step 4: Verify a Password

Passlib makes it easy to verify passwords against hashes. Use the verify method.

 
# Verify a password
is_valid = pbkdf2_sha256.verify("mysecurepassword", hashed_password)
print(is_valid)

True

If the password matches, it returns True. Otherwise, it returns False.

Common Issues and Fixes

If you face errors, ensure pip is updated. Run pip install --upgrade pip.

For ModuleNotFoundError, check your Python environment. Learn more in our module error guide.

Conclusion

Installing Passlib in Python is simple with pip. It provides secure password hashing for your applications. Follow these steps to get started.

Now you can use Passlib to handle passwords safely. For more details, check the official Passlib documentation.