Since an ordered dictionary remembers its insertion order, it can be used in conjunction with sorting to make a sorted dictionary: >>> >>># regular unsorted dictionary>>>d={'banana':3,'apple':4,'pear':1,'orange':2}>>># dictionary sorted by key>>>OrderedDict(sorted(d.items(),key=l...
OrderedDict() d1['a'] = 'A' d1['b'] = 'B' d1['c'] = 'C' d1['1'] = '1' d1['2'] = '2' for k,v in d1.items(): print k,v 输出: Regular dictionary a A c C b B Order dictionary a A b B c C 1 1 2 2 可以看到,同样是保存了ABC等几个元素,但是使用...
importcollections my_order_dict=collections.OrderedDict(name="test",age=27,money=100,hourse=None)forkey,valueinmy_order_dict.items():print(key,value) 输出: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 hourse None age27money100name test ...
x={'x':20,'a':12,'b':5}print(x.keys())print(x.values()) 执行这段代码,会输出如下的内容: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 dict_keys(['x','a','b'])dict_values([20,12,5]) PS:dict_keys和dict_values是Python的两个内部类,他们都采用了树的结构对数据进行组织。
():8printk,v910print"\nOrder dictionary"11d1 =collections.OrderedDict()12d1['a'] ='A'13d1['b'] ='B'14d1['c'] ='C'15d1['1'] ='1'16d1['2'] ='2'17fork,vind1.items():18printk,v1920输出:21Regular dictionary22a A23c C24b B2526Order dictionary27a A28b B29c C301 1312...
>>> d = p._asdict() # convert to a dictionary >>> d['x'] 11 >>> Point(**d) # convert from a dictionary Point(x=11, y=22) >>> p._replace(x=100) # _replace() is like str.replace() but targets named fields Point(x=100, y=22) ...
[key]) ... three -> 3 two -> 2 one -> 1 >>> # Iterate over the items in reverse order >>> for key, value in reversed(numbers.items()): ... print(key, "->", value) ... three -> 3 two -> 2 one -> 1 >>> # Iterate over the keys in reverse order >>> for key...
def __init__(self, other=(), /, **kwds): '''Initialize an ordered dictionary. The signature is the same as regular dictionaries. Keyword argument order is preserved. ''' try: self.__root except AttributeError: self.__hardroot = _Link() self.__root = root = _proxy(self.__har...
print"\nOrder dictionary"d1=collections.OrderedDict()d1['a']='A'd1['b']='B'd1['c']='C'd1['1']='1'd1['2']='2'fork,vind1.items():print k,v 输出: Regular dictionary aAcCbBOrder dictionary aAbBcC1122 可以看到,同样是保存了ABC等几个元素,但是使用OrderedDict会根据放入元素的先后顺...
import collections print 'Regular dictionary:' d = {} d['a'] = 'A' d['b'] = 'B' d['c'] = 'C' for k, v in d.items(): print k, v print '\nOrderDict:' d = collections.OrderedDict() d['a'] = 'A' d['b'] = 'B' d['c'] = 'C' for k, v in d.items():...