{"library":"py-lets-be-rational","title":"py-lets-be-rational","description":"Pure Python implementation of Peter Jaeckel's LetsBeRational, providing high-precision computation of implied volatility and option pricing using rational approximations. Current version 1.0.1, released on PyPI with no updates since 2018. Low maintenance but stable.","language":"python","status":"active","last_verified":"Fri May 01","install":{"commands":["pip install py-lets-be-rational"],"cli":null},"imports":["from lets_be_rational import ImpliedVolatility","from lets_be_rational import Black"],"auth":{"required":false,"env_vars":[]},"quickstart":{"code":"from lets_be_rational import ImpliedVolatility\nimport math\n\niv = ImpliedVolatility()\n# Example: forward=1.2, strike=1.0, time to expiry=0.5, option price=0.2, call=True\nsigma = iv.implied_volatility(1.2, 1.0, 0.5, 0.2, True)\nprint(f\"Implied Volatility: {sigma:.6f}\")","lang":"python","description":"Computes implied volatility using Let's Be Rational algorithm.","tag":null,"tag_description":null,"last_tested":null,"results":[]},"compatibility":null}