parameters: (self, index=None, name=None, params=None)
return_statement: return self.transport.perform_request('HEAD', _make_path(index, '_alias',
                  name), params=params)
docstring: Return a boolean indicating whether given alias exists.
          `<http://www.elastic.co/guide/en/elasticsearch/reference/current/indices-aliases.html>`_
  
          :arg index: A comma-separated list of index names to filter aliases
          :arg name: A comma-separated list of alias names to return
          :arg allow_no_indices: Whether to ignore if a wildcard indices
              expression resolves into no concrete indices. (This includes `_all`
              string or when no indices have been specified)
          :arg expand_wildcards: Whether to expand wildcard expression to concrete
              indices that are open, closed or both., default 'all', valid choices
              are: 'open', 'closed', 'none', 'all'
          :arg ignore_unavailable: Whether specified concrete indices should be
              ignored when unavailable (missing or closed)
          :arg local: Return local information, do not retrieve the state from
              master node (default: false)
docstring_summary: Return a boolean indicating whether given alias exists.
          `<http://www.elastic.co/guide/en/elasticsearch/reference/current/indices-aliases.html>`_
docstring_tokens: Return a boolean indicating whether given alias exists . <http : // www . elastic . co / guide / en / elasticsearch / reference / current / indices - aliases . html > _
function: def exists_alias(self, index=None, name=None, params=None):
          """
          Return a boolean indicating whether given alias exists.
          `<http://www.elastic.co/guide/en/elasticsearch/reference/current/indices-aliases.html>`_
  
          :arg index: A comma-separated list of index names to filter aliases
          :arg name: A comma-separated list of alias names to return
          :arg allow_no_indices: Whether to ignore if a wildcard indices
              expression resolves into no concrete indices. (This includes `_all`
              string or when no indices have been specified)
          :arg expand_wildcards: Whether to expand wildcard expression to concrete
              indices that are open, closed or both., default 'all', valid choices
              are: 'open', 'closed', 'none', 'all'
          :arg ignore_unavailable: Whether specified concrete indices should be
              ignored when unavailable (missing or closed)
          :arg local: Return local information, do not retrieve the state from
              master node (default: false)
          """
          return self.transport.perform_request('HEAD', _make_path(index, '_alias',
                  name), params=params)
function_tokens: def exists_alias ( self , index = None , name = None , params = None ) : return self . transport . perform_request ( 'HEAD' , _make_path ( index , '_alias' , name ) , params = params )