code: def ci(python="python", codecov="codecov", coverage_file="coverage.xml", wheel=True):
      
  
      # Import pip
      from pip import __version__ as pip_version
      if Version(pip_version) >= Version("10.0.0"):
          import pip._internal as pip
      else:
          import pip
  
      # Install requirements with pip
      pip.main(["install"] + DEPENDENCIES + REQUIREMENTS + ["-U"])
      # Build the installation wheel
      if wheel is True:
          build_and_install_wheel(python)
          # Remove all non-essential files
          for to_delete in TO_DELETE:
              rmtree(to_delete)
      # Run the tests on the installed ttkthemes
      return_code = run_command("{} -m nose --with-coverage --cover-xml --cover-package=ttkthemes".format(python))
      if return_code != 0:
          print("Tests failed.")
          exit(return_code)
      print("Tests successful.")
      # Run codecov
      return_code = run_command("{} -f {}".format(codecov, coverage_file))
      if return_code != 0:
          print("Codecov failed.")
          exit(return_code)
      # Successfully finished CI
      exit(0)
docs: Run the most common CI tasks