parameters: (self, x)
return_statement: return "&" + self.XML_SPECIAL_CHARS_TO_ENTITIES[x.group(0)[0]] + ";"
docstring: Used with a regular expression to substitute the
          appropriate XML entity for an XML special character.
docstring_summary: Used with a regular expression to substitute the
          appropriate XML entity for an XML special character.
docstring_tokens: Used with a regular expression to substitute the appropriate XML entity for an XML special character .
function: def _sub_entity(self, x):
          """Used with a regular expression to substitute the
          appropriate XML entity for an XML special character."""
          return "&" + self.XML_SPECIAL_CHARS_TO_ENTITIES[x.group(0)[0]] + ";"
function_tokens: def _sub_entity ( self , x ) : return "&" + self . XML_SPECIAL_CHARS_TO_ENTITIES [ x . group ( 0 ) [ 0 ] ] + ";"