parameters: (self, ticker, amount)
docstring: 买入（卖出）数量为amount的股票ticker
docstring_summary: 买入（卖出）数量为amount的股票ticker
docstring_tokens: 买入（卖出）数量为amount的股票ticker
function: def order(self, ticker, amount):
          '''买入（卖出）数量为amount的股票ticker'''
          pass
function_tokens: def order ( self , ticker , amount ) : pass