Guix Python Developement Environment

(use-modules (guix packages)
             (guix licenses)
             (guix build-system python)
             (gnu packages)
             (gnu packages version-control)
             (gnu packages python))

(package
  (name "python project")
  (version "1.0")
  (source #f)
  (build-system python-build-system)
  (native-inputs
    `(("python-pytest" ,python-pytest)))
  (inputs
   `(("python" ,python)))
  (synopsis "A cool python project")
  (description "This software does some cool stuff, trust me.")
  (home-page "https://example.com")
  (license expat))