Python：对于defaultdict，打印键和值

Question

这本词典会随着键和值的变化而不断变化。所以，我想访问这些键和值并像预期的答案一样打印出来。由于我是 Python 的新手，我们将不胜感激任何帮助。

     dictionary=
       {'key1': {'key10': [[66619, 'event1'], [64800, 'event2']]},
        'key2': {'key11': [[28250, 'event3'], [17960, 'event4'], [23484, 'event5'], [21945, 'event6']]},
        'key3': {'key12': [[359319, 'event7'], [322334, 'event8'], [273316, 'event9']], 'key13': [[452945, 'event10'], [414268, 'event11']]}
       }

预期答案：

名称:key1 , Address:key10, Number:66619, Pin_code:event1

名称:key1 , Address:key10, Number:64800, Pin_code:event2

名称:key2 , Address:key11, Number:28250, Pin_code:event3

名称:key2 , Address:key11, Number:17960, Pin_code:event4

名称:key2 , Address:key11, Number:23484, Pin_code:event5

名称:key2 , Address:key11, Number:21945, Pin_code:event6

名称:key3 , Address:key12, Number:359319, Pin_code:event7

名称:key3 , Address:key12, Number:322334, Pin_code:event8

名称:key3 , Address:key12, Number:273316, Pin_code:event9

名称:key3 , Address:key13, Number:452945, Pin_code:event10

名称:key3 , Address:key13, Number:414268, Pin_code:event11

Answer 1

字典本质上是无序的。你必须使用 collections.OrderedDict() if you want to maintain the order within dict. As per the OrderedDict document:

Return an instance of a dict subclass, supporting the usual dict methods. An OrderedDict is a dict that remembers the order that keys were first inserted. If a new entry overwrites an existing entry, the original insertion position is left unchanged. Deleting an entry and reinserting it will move it to the end.

如果您只想打印此内容而不实际存储排序后的数据，您可以使用简单的 sorted() 函数来实现：

from operator import itemgetter

for k, v in sorted(dictionary.items(), key=itemgetter(0)):
    for k1, v1 in sorted(v.items(), key=itemgetter(0)):
        for content in v1:
            print 'Name: {}, Address: {}, Number: {}, Pin: {}'.format(k, k1, content[0], content[1])

这将打印：

Name: key1, Address: key10, Number: 66619, Pin: event1
Name: key1, Address: key10, Number: 64800, Pin: event2
Name: key2, Address: key11, Number: 28250, Pin: event3
Name: key2, Address: key11, Number: 17960, Pin: event4
Name: key2, Address: key11, Number: 23484, Pin: event5
Name: key2, Address: key11, Number: 21945, Pin: event6
Name: key3, Address: key12, Number: 359319, Pin: event7
Name: key3, Address: key12, Number: 322334, Pin: event8
Name: key3, Address: key12, Number: 273316, Pin: event9
Name: key3, Address: key13, Number: 452945, Pin: event10
Name: key3, Address: key13, Number: 414268, Pin: event11

Python：对于defaultdict，打印键和值

Python: For defaultdict, print keys and values

python

defaultdict