Python Learning ordered Dictionaries

Custom Create ordered dictionary classes

Dict's __getitem__ method is somewhat different and wants to use a custom __getitem__ method to display the subscript of the query key;

#/usr/bin/env python3#-*-coding:utf-8-*-# author:zshaoxclass mydict (dict):    li = []  #定义列表用于有序的排列key值      def __setitem__ (self, Key, value): #自定义__setitem__方法, extending the parent class method        Self.li.append (key) #将对象的key added to the list        super (mydict, SE LF). __setitem__ (key, value)   #将key, value is written to the dictionary, calling the parent class __setitem__ method    def __str__ (self): #自定义__str__方法        Temp_  List = [] #定义临时列表 the dictionary string used to hold the stitching for        key in Self.li:            value = Self.get (key)            if type (value) = = Int:                msg = "'%s ':%s"% (key, value)                temp_list.append (msg)            elif type (value) = = str:                msg = "'%s ': '%s '"% (key, value) 
   temp_list.append (msg)        temp_str = ' {' + ', '. Join (Temp_list) + '} '    #拼接字典字符串        return temp_strdic = Mydict () dic[' k1 '] = 123dic[' K2 '] = 321print (dic, type (DIC)) print (DIC)

　　

Python Learning ordered Dictionaries