parameters: (self)
return_statement: return self.dict.keys()
docstring: Get all of a message's header field names.
docstring_summary: Get all of a message's header field names.
docstring_tokens: Get all of a message s header field names .
function: def keys(self):
          """Get all of a message's header field names."""
          return self.dict.keys()
function_tokens: def keys ( self ) : return self . dict . keys ( )