Python problems and solutions

Generic problems with solutions and tests in Python.

Requirements

• Python >= 3.0
• Coverage

Tests

Install pytest:

pip install pytest

Run all tests:

pytest

Stop pytest after first failure

pytest -x

Run single unit test:

pytest <path_to_file.py>

Es:

pytest tests/algorithms/strings/test_stringutil.py

Generate code coverage

Install coverage:

pip install coverage

Show coverage:

coverage run --source=src/ -m pytest

Using pytest-cov. Install it:

pip install pytest-cov 

Show coverage

pytest --cov=src tests/

Generate HTML reports:

coverage run --source=src/ -m pytest
coverage html

Coverage has a problem: it doesn't generate a report for files without test so I use pytest-cov:

pytest --cov=src tests/ --cov-report=html

Running pylint:

pylint src --disable=missing-docstring && pylint test --disable=missing-docstring

Create or Update dependencies

pip freeze > requirements.txt

Resources

• Problem Solving with Algorithms and Data Structures using Python
• Python Algorithms
• Python best practices
• Python best practices on Real Python
• File naming conventions