old_contents: import nox
  
  PYTHON_VERSIONS = ["3.6", "3.7", "3.8"]
  PACKAGE = "abilian"
  
  
  @nox.session(python="python3.6")
  def lint(session):
      # session.env["LC_ALL"] = "en_US.UTF-8"
      session.install("poetry", "psycopg2-binary")
      session.run("poetry", "install", "-q")
      session.run("yarn", external="True")
      session.run("make", "lint-ci")
  
  
  @nox.session(python=PYTHON_VERSIONS)
  def pytest(session):
      # session.env["LC_ALL"] = "en_US.UTF-8"
      session.install("psycopg2-binary")
  
      cmd = "echo ; echo SQLALCHEMY_DATABASE_URI = $SQLALCHEMY_DATABASE_URI ; echo"
      session.run("sh", "-c", cmd, external=True)
  
      session.run("poetry", "install", "-q", external="True")
      session.run("yarn", external="True")
  
      session.run("pip", "check")
      session.run("pytest", "-q")
  
  
  # TODO later
  # @nox.session(python="3.8")
  # def typeguard(session):
  #     # session.env["LC_ALL"] = "en_US.UTF-8"
  #     session.install("psycopg2-binary")
  #     session.run("poetry", "install", "-q", external="True")
  #     session.run("yarn", external="True")
  #     session.run("pytest", f"--typeguard-packages={PACKAGE}")
  
new_contents: import nox
  
  PYTHON_VERSIONS = ["3.6", "3.7", "3.8"]
  PACKAGE = "abilian"
  
  
  @nox.session(python="python3.6")
  def lint(session):
      # session.env["LC_ALL"] = "en_US.UTF-8"
      session.install("poetry", "psycopg2-binary")
      session.run("poetry", "install", "-q")
      session.run("yarn", external=True)
      session.run("make", "lint-ci")
  
  
  @nox.session(python=PYTHON_VERSIONS)
  def pytest(session):
      # session.env["LC_ALL"] = "en_US.UTF-8"
      session.install("psycopg2-binary")
  
      cmd = "echo ; echo SQLALCHEMY_DATABASE_URI = $SQLALCHEMY_DATABASE_URI ; echo"
      session.run("sh", "-c", cmd, external=True)
  
      session.run("poetry", "install", "-q", external=True)
      session.run("yarn", external=True)
  
      session.run("pip", "check")
      session.run("pytest", "-q")
  
  
  # TODO later
  # @nox.session(python="3.8")
  # def typeguard(session):
  #     # session.env["LC_ALL"] = "en_US.UTF-8"
  #     session.install("psycopg2-binary")
  #     session.run("poetry", "install", "-q", external=True)
  #     session.run("yarn", external=True)
  #     session.run("pytest", f"--typeguard-packages={PACKAGE}")
  
subject: use proper booleans.