#字典的添加、删除、修改操作
dict = {"a" : "apple", "b" : "banana", "g" : "grape", "o" : "orange"} dict["w"] = "watermelon" #添加 del(dict["a"]) #删除 dict["g"] = "grapefruit" print dict.pop("b") print dictdict.clear() #清空 print dict
#字典的遍历
dict = {"a" : "apple", "b" : "banana", "g" : "grape", "o" : "orange"} for k in dict: print "dict[%s] =" % k,dict[k]
#字典items()的使用
dict = {"a" : "apple", "b" : "banana", "c" : "grape", "d" : "orange"}
每个元素是一个key和value组成的元组,以列表的方式输出print dict.items()
#调用items()实现字典的遍历
dict = {"a" : "apple", "b" : "banana", "g" : "grape", "o" : "orange"} for (k, v) in dict.items(): print "dict[%s] =" % k, v
#调用iteritems()实现字典的遍历
dict = {"a" : "apple", "b" : "banana", "c" : "grape", "d" : "orange"} print dict.iteritems() for k, v in dict.iteritems(): print "dict[%s] =" % k, v for (k, v) in zip(dict.iterkeys(), dict.itervalues()): print "dict[%s] =" % k, v