PyTest installation (pip install pytest)

Introduction

PyTest helps you run tests easily. Installing it lets you check your code works well.

You want to start testing your Python code.

You need a simple tool to run many tests quickly.

You want to check if your code changes break anything.

You want to use a popular testing tool with many features.

Syntax

PyTest

pip install pytest

This command installs PyTest using Python's package manager.

Run it in your command line or terminal, not inside Python code.

Examples

Installs the latest version of PyTest globally on your system.

PyTest

pip install pytest

Installs a specific version (7.4.0) of PyTest if you need that version.

PyTest

pip install pytest==7.4.0

Updates PyTest to the newest version if you already have it installed.

PyTest

pip install --upgrade pytest

Sample Program

This simple test checks if 1 + 1 equals 2. After installing PyTest, you run pytest in the terminal to see the test result.

PyTest

import pytest

def test_addition():
    assert 1 + 1 == 2

# Run this in terminal:
# pytest

# Expected output:
# ============================= test session starts =============================
# collected 1 item
#
# test_sample.py .                                                         [100%]
#
# ============================== 1 passed in 0.01s ==============================

Important Notes

Make sure Python and pip are installed before running the command.

Use a virtual environment to keep your project dependencies clean.

If you get permission errors, try adding --user to the install command.

Summary

PyTest is installed using the command pip install pytest.

Run the command in your terminal, not inside Python code.

After installation, you can run tests easily with the pytest command.