将字典转换为OrderedDict
我在使用collections.OrderedDict类时遇到了一些麻烦。 我在Raspbian上使用了Python 2.7，Debian是Raspberry Pi的发行版。 我试图打印两个字典，以便比较（并排）文本冒险。 该命令是准确比较的必要条件。 不pipe我用什么方法尝试字典，都是按照通常无序的方式打印的。
当我在我的RPi上执行操作时，我得到了以下结果：
import collections ship = {"NAME": "Albatross", "HP":50, "BLASTERS":13, "THRUSTERS":18, "PRICE":250} ship = collections.OrderedDict(ship) print ship # OrderedDict([('PRICE', 250), ('HP', 50), ('NAME', 'Albatross'), ('BLASTERS', 13), ('THRUSTERS', 18)])
显然，有些东西是不对的，因为它正在打印函数调用，并将键和值组放入一个嵌套列表中…
这就是我在PC上运行类似的东西：
import collections Joe = {"Age": 28, "Race": "Latino", "Job": "Nurse"} Bob = {"Age": 25, "Race": "White", "Job": "Mechanic", "Random": "stuff"} #Just for clarity: Joe = collections.OrderedDict(Joe) Bob = collections.OrderedDict(Bob) print Joe # OrderedDict([('Age', 28), ('Race', 'Latino'), ('Job', 'Nurse')]) print Bob # OrderedDict([('Age', 25), ('Race', 'White'), ('Job', 'Mechanic'), ('Random', 'stuff')])
这一次，它是为了，但它不应该打印其他东西，但对不对？ （把它列入并显示函数调用。）
我在哪里犯我的错误？ 它不应该与Python的pi版本有关，因为它只是Linux版本。
您先创build一个字典，然后将该字典传递给OrderedDict 。 当你这样做的时候，sorting不再是正确的。 dict固有地不被命令。
而是传递一系列的元组：
ship = [("NAME", "Albatross"), ("HP", 50), ("BLASTERS", 13), ("THRUSTERS", 18), ("PRICE", 250)] ship = collections.OrderedDict(ship)
打印OrderedDict时看到的是代表性 ，而且完全正确。 OrderedDict([('PRICE', 250), ('HP', 50), ('NAME', 'Albatross'), ('BLASTERS', 13), ('THRUSTERS', 18)])在可重现的表示中， OrderedDict的内容是什么。
大多数情况下，当我们需要一个自定义的订单而不是像ASC这样的通用订单时，我们会去订购OrictDict。
这里是解决scheme：
import collections ship = {"NAME": "Albatross", "HP":50, "BLASTERS":13, "THRUSTERS":18, "PRICE":250} ship = collections.OrderedDict(ship) print ship new_dict = collections.OrderedDict() new_dict["NAME"]=ship["NAME"] new_dict["HP"]=ship["HP"] new_dict["BLASTERS"]=ship["BLASTERS"] new_dict["THRUSTERS"]=ship["THRUSTERS"] new_dict["PRICE"]=ship["PRICE"] print new_dict
这将被输出：
OrderedDict([('PRICE', 250), ('HP', 50), ('NAME', 'Albatross'), ('BLASTERS', 13), ('THRUSTERS', 18)]) OrderedDict([('NAME', 'Albatross'), ('HP', 50), ('BLASTERS', 13), ('THRUSTERS', 18), ('PRICE', 250)])
注意 ：当删除条目时，新sorting的字典会保持sorting顺序。 但是，当添加新的密钥时，密钥被追加到最后，并且不保持sorting（ 官方文档 ）
如果你不能编辑代码的这部分代码，你仍然可以用任何你想要的方式来命令它，比如：
from collections import OrderedDict order_of_keys = ["key1", "key2", "key3", "key4", "key5"] list_of_tuples = [(key, your_dict[key]) for key in order_of_keys] your_dict = OrderedDict(list_of_tuples)
我知道是一个旧的职位，但我最近不得不处理这样的事情只是它更复杂。
两个答案都很好，取决于你最终的目标是什么。 我想提一下@Martijn和@Abdul提供的2个答案之间的重要区别。
如果你看他们的答案，他们构build字典的方式就不同了。 @Martijn使用元组列表，而@Abdul则是用Python定义字典的更为标准的方式。
在哪里可以看到这是当你有一个多层次的字典，就像这样：
dict = {"key": value, {"key_2": value_2, {"key_3": value_3 } } }
如果你通过@Abdul的答案，你可以很容易迭代一个子字典，只要跟踪键，但@Martijn答案会给你一个列表里面的dict不容易迭代（你需要循环等）的字典。
同样，这取决于应用程序的复杂性。 我最近遇到了一个需要一个OrderedDict并在任何级别迭代其子字节键的情况。 Python中的字典的全部要点是通过search特定的密钥来实现价值。
下面的例子是由我parsing几个XML文件并附加到一个空的字典。 在看到字典后，我必须检查每个子字典的某些条件。
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