parameters: (self, attrs, qnames)
docstring: NS-aware implementation.
  
          attrs should be of the form {(ns_uri, lname): value, ...}.
          qnames of the form {(ns_uri, lname): qname, ...}.
docstring_summary: NS-aware implementation.
docstring_tokens: NS - aware implementation .
function: def __init__(self, attrs, qnames):
          """NS-aware implementation.
  
          attrs should be of the form {(ns_uri, lname): value, ...}.
          qnames of the form {(ns_uri, lname): qname, ...}."""
          self._attrs = attrs
          self._qnames = qnames
function_tokens: def __init__ ( self , attrs , qnames ) : self . _attrs = attrs self . _qnames = qnames