code: def fetch(bank, key):
      '''
      Fetch a key value.
      '''
      c_key = '{0}/{1}'.format(bank, key)
      try:
          _, value = api.kv.get(c_key)
          if value is None:
              return {}
          return __context__['serial'].loads(value['Value'])
      except Exception as exc:
          raise SaltCacheError(
              'There was an error reading the key, {0}: {1}'.format(
                  c_key, exc
              )
          f fetch(bank, key):
      '''
      Fetch a key value.
      '''
      c_key = '{0}/{1}'.format(bank, key)
      try:
          _, value = api.kv.get(c_key)
          if value is None:
              return {}
          return __context__['serial'].loads(value['Value'])
      except Exception as exc:
          raise SaltCacheError(
              'There was an error reading the key, {0}: {1}'.format(
                  c_key, exc
              )
          )
docs: Fetch a key value.