python3_字典

# -*- coding: utf-8 -*-class ShowDict(object):    '''该类用于展示字典的使用方法 '''    def __init__(self):        self.spiderMan = self.createDict()        self.insertDict(self.spiderMan)        self.modifyDict(self.spiderMan)        self.operationDict(self.spiderMan)        self.deleteDict(self.spiderMan)    def createDict(self):        print(u"创建字典:")        print(u"执行命令spiderMan = {'name':'Peter Parker','sex':'male','Nation':'Americ','college':'MIT'}")        spiderMan = {'name': 'Peter Parker', 'sex': 'male', 'Nation': 'Americ', 'college': 'MIT'}        self.showDict(spiderMan)        return spiderMan    def showDict(self, spiderMan):        print(u"显示字典")        print(u"spiderMan = "),        print(spiderMan)        print('\n')    def insertDict(self, spiderMan):        print(u"字典中添加键age，值为31")        print(u"执行命令spiderMan['age'] = 31")        spiderMan['age'] = 31        self.showDict(spiderMan)    def modifyDict(self, spiderMan):        print(u"字典修改键'college'的值为'Empire State University'")        print(u"执行命令spiderMan['college'] = 'Empire State University'")        spiderMan['college'] = 'Empire State University'        self.showDict(spiderMan)    def operationDict(self, spiderMan):        print(u"字典的其它操作方法")        print(u"###########################")        print(u"显示字典所有的键，keyList = spiderMan.keys()")        keyList = spiderMan.keys()        print(u"keyList = "),        print(keyList)        print('\n')        print(u"显示字典所有键的值，valueList = spiderMan.values()")        valueList = spiderMan.values()        print(u"valueList = "),        print(valueList)        print('\n')        print(u"显示字典所有键和值的元组，itemList = spiderMan.items()")        itemList = spiderMan.items()        print(u"itemList = "),        print(itemList)        print('\n')        print(u"取字典中键为college的值,college = spiderman.get('college')")        college = spiderMan.get('college')        print(u"college = %s" % college)        print('\n')    def deleteDict(self, spiderMan):        print(u"删除字典中键为Nation的值")        print(u"执行命令 del(spiderMan['Nation'])")        del (self.spiderMan['Nation'])        self.showDict(spiderMan)        print(u"清空字典中所有的值")        print(u"执行命令 spiderMan.clear()")        self.spiderMan.clear()        self.showDict(spiderMan)        print(u"删除字典")        print(u"执行命令 del(spiderMan)")        del (spiderMan)        print(u"显示spiderMan")        try:            self.showDict(spiderMan)        except NameError:            print(u"spiderMan 未被定义")if __name__ == '__main__':    sd = ShowDict()