parameters: (self, prec)
docstring: Rounds down (not towards 0 if negative)
docstring_summary: Rounds down (not towards 0 if negative)
docstring_tokens: Rounds down ( not towards 0 if negative )
function: def _round_floor(self, prec):
          """Rounds down (not towards 0 if negative)"""
          if not self._sign:
              return self._round_down(prec)
          else:
              return -self._round_down(prec)
function_tokens: def _round_floor ( self , prec ) : if not self . _sign : return self . _round_down ( prec ) else : return - self . _round_down ( prec )