parameters: (self)
return_statement: return self._exp == 'n'
docstring: Return True if self is a quiet NaN; otherwise return False.
docstring_summary: Return True if self is a quiet NaN; otherwise return False.
docstring_tokens: Return True if self is a quiet NaN ; otherwise return False .
function: def is_qnan(self):
          """Return True if self is a quiet NaN; otherwise return False."""
          return self._exp == 'n'
function_tokens: def is_qnan ( self ) : return self . _exp == 'n'