Summary
Behave is the leading Behavior-Driven Development framework for Python, allowing teams to write human-readable test scenarios in Gherkin and execute them against a Python application.
What is Behave?
Behave brings BDD to Python by mapping Gherkin feature files—written in plain Given/When/Then language—to Python step definitions. A feature file describes a business scenario in natural language; step definitions implement the corresponding test logic in Python code.
The separation of specification from implementation means product owners and QA analysts can author or review scenarios without knowing Python, while developers implement the steps. Behave integrates with standard Python tooling, test fixtures, and dependency injection patterns.
Behave is commonly used alongside web testing libraries such as Selenium or Playwright to drive browser-based acceptance tests from Gherkin scenarios.
Why is Behave relevant?
- Python-native BDD: Delivers the full BDD workflow within the Python ecosystem without requiring additional runtimes
- Readable specifications: Gherkin feature files serve as living documentation understandable by non-developers
- Flexible integration: Works with any Python testing library, web driver, or API client