def sayHello():
 return "Hello World-你好世界"

def addValue(a, b):
 return a + b

def int2str(data):
 return [str(i) for i in data]

def packOrder(order):
 req = {}
 req['price'] = order['input_price']
 req['volume'] = order['input_volume']
 req['remark'] = 'fruit'
 return req