code: def prep_shell_environment(nova_env, nova_creds):
      
      new_env = {}
  
      for key, value in prep_nova_creds(nova_env, nova_creds):
          if type(value) == six.binary_type:
              value = value.decode()
          new_env[key] = value
  
      return new_env
docs: Appends new variables to the current shell environment temporarily.