本文介紹了OrderedDict的一個使用場景，根據元素型別分割一個OrderDict，分割後的型別為

{
    key1:OrderedDict1,
    key2:OrderedDict2

}

下面是程式碼：

from collections import OrderedDict

class order(object):
    def __init__(self,id,symbol,price):
        self.id = id
        self.symbol=symbol
        self.price = price


orderdict = OrderedDict()

orderdict['110']=order('001','btc',100)
orderdict['200']=order('002','usdt',200)
orderdict['333']=order('003','btc',300)

def separate(orderdict):
    sum = {}
    for key,order in orderdict.items():
        if sum.get(order.symbol):
            sum[order.symbol][order.id] = order
        else:
            sum[order.symbol] = OrderedDict([(order.id,order)])
    return sum


if __name__ == '__main__':
    print(separate(orderdict))