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a 特定关键清单的字典
原标题:sort a dict by a given list of key
  • 时间:2012-05-06 05:46:21
  •  标签:
  • python

我阅读了每字的bu或电子邮件的数据和计算频率。 第一个构筑两个反面:

counters.stats = collections.defaultdict(dict)

统计的关键是文字。 我每字都要写一个字句,其关键是电子邮件的名称,其价值是该词在本电子邮件中的频率。

现在,我有一份清单,按不同顺序列出这些关键内容。 我想把统计中的钥匙按清单分类。

def print_stats(counters):
    for form, cat_to_stats in sorted(counters.stats.items(), key = chi_sort):

• 如何建设神职? 或其他方法?

最佳回答

假设<代码>L中的数值仅发生一次:

D = dict((b,a) for a,b in enumerate(L))
chi_sort = D.get

www.un.org/spanish/ga/president

如果按相反顺序得出这些数值,请在<代码>上添加<>reversed=True至sorted

问题回答

使用:

chi_sort = lambda item: your_list_here.index(item[0])

(Replace your_list_here with their list)

例( Collections.OrderedDict,可改为正常的dict):

>>> import collections
>>> ordereddict = collections.OrderedDict((
...     ( key_78 ,  value ),
...     ( key_40 ,  value ),
...     ( key_96 ,  value ),
...     ( key_53 ,  value ),
...     ( key_04 ,  value ),
...     ( key_89 ,  value ),
...     ( key_52 ,  value ),
...     ( key_86 ,  value ),
...     ( key_16 ,  value ),
...     ( key_63 ,  value ),
... ))
>>>
>>> alist = sorted(ordereddict.keys())
>>> alist
[ key_04 ,  key_16 ,  key_40 ,  key_52 ,  key_53 ,  key_63 ,  key_78 ,  key_86 ,
  key_89 ,  key_96 ]
>>> sorted(ordereddict.items(), key=lambda item: alist.index(item[0]))
[( key_04 ,  value ), ( key_16 ,  value ), ( key_40 ,  value ), ( key_52 ,  valu
e ), ( key_53 ,  value ), ( key_63 ,  value ), ( key_78 ,  value ), ( key_86 ,  
value ), ( key_89 ,  value ), ( key_96 ,  value )]




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