def order_update(ticker, /, price, volume):
print("%s成交价%s成交量%s" % (ticker,price, volume))
order_update(ticker = "中国平安", 36.5, 10000)
File "<ipython-input-33-781c843c0c5e>", line 1 def order_update(ticker, /, price, volume): ^ SyntaxError: invalid syntax