def __init__(self, symbol, precedence, associative=False):
    """Constructor.

    Args:
      symbol: The character which represents this operation, such as '+' for
          addition.
      precedence: Operator precedence. This will determine where parentheses
          are used.
      associative: If true, the order of the operands does not matter.
    """
    self.symbol = symbol
    self.precedence = precedence
    self.associative = associative
def __init__ ( self , symbol , precedence , associative = False ) : self . symbol = symbol self . precedence = precedence self . associative = associative
Constructor.

    Args:
      symbol: The character which represents this operation, such as '+' for
          addition.
      precedence: Operator precedence. This will determine where parentheses
          are used.
      associative: If true, the order of the operands does not matter.