code: def get_version_requested(path):
      
      tf_version_path = os.path.join(path,
                                     TF_VERSION_FILENAME)
      if not os.path.isfile(tf_version_path):
          LOGGER.error("Terraform install attempted and no %s file present to "
                       "dictate the version. Please create it (e.g.  write "
                       "\"0.11.13\" (without quotes) to the file and try again",
                       TF_VERSION_FILENAME)
          sys.exit(1)
      with open(tf_version_path, 'r') as stream:
          ver = stream.read().rstrip()
      return ver
docs: Return string listing requested Terraform version.