[英]Counting the repetition of values in a python dictionary
I have a dictionary in below format. 我有以下格式的字典。 In this dictionary different kind of zones are present, but multiple times.
在这本词典中,存在不同类型的区域,但是存在多次。 I want to generate another dictionary from this, which will contain an additional key "Count", and that key will contains the no of times a zone(ie either "Full Run or Half Run or Semi Run") is repeated.
我想从中生成另一个字典,该字典将包含一个额外的键“ Count”,并且该键将包含区域(即“ Full Run,Half Run或Semi Run”)重复的次数。
[
{'zip_zone': u'Full Run', 'zipcode': u'14042', 'longitude': -78.516154},
{'zip_zone': u'Full Run', 'zipcode': u'14101', 'longitude': -78.51734},
{'zip_zone': u'Full Run', 'zipcode': u'14706', 'longitude': -78.493761},
{'zip_zone': u'Half Run', 'zipcode': u'14709', 'longitude': -78.024817},
{'zip_zone': u'Semi Run', 'zipcode': u'14711', 'longitude': -78.119974},
{'zip_zone': u'Full Run', 'zipcode': u'14714', 'longitude': -78.256921},
{'zip_zone': u'Half Run', 'zipcode': u'14715', 'longitude': -78.157392},
{'zip_zone': u'Semi Run', 'zipcode': u'14717', 'longitude': -78.210567},
{'zip_zone': u'Semi Run', 'zipcode': u'14719', 'longitude': -78.86951},
{'zip_zone': u'Half Run', 'zipcode': u'14727', 'longitude': -78.268103},
{'zip_zone': u'Semi Run', 'zipcode': u'14731', 'longitude': -78.658909},
{'zip_zone': u'Half Run', 'zipcode': u'14735', 'longitude': -78.087607},
{'zip_zone': None, 'zipcode': u'14737', 'longitude': -78.431625},
{'zip_zone': u'Semi Run', 'zipcode': u'14739', 'longitude': -78.139046},
{'zip_zone': u'Semi Run', 'zipcode': u'14741', 'longitude': -78.5907},
{'zip_zone': u'Special Run', 'zipcode': u'14743', 'longitude': -78.4098},
{'zip_zone': u'Special Run', 'zipcode': u'14744', 'longitude': -78.167853},
{'zip_zone': u'Half Run', 'zipcode': u'14748', 'longitude': -78.639987},
{'zip_zone': u'Semi Run', 'zipcode': u'14753', 'longitude': -78.640416},
{'zip_zone': u'Special Run', 'zipcode': u'14754', 'longitude': -78.18395},
{'zip_zone': u'Special Run', 'zipcode': u'14755', 'longitude': -78.800866},
{'zip_zone': u'Half Run', 'zipcode': u'14760', 'longitude': -78.426015},
]
The output dict should look like 输出字典应该看起来像
[
{'zip_zone': u'Full Run', 'zipcode': u'14042', 'longitude': -78.516154, 'count': 4},
{'zip_zone': u'Full Run', 'zipcode': u'14101', 'longitude': -78.51734, 'count': 4},
{'zip_zone': u'Full Run', 'zipcode': u'14706', 'longitude': -78.493761, 'count': 4},
{'zip_zone': u'Half Run', 'zipcode': u'14709', 'longitude': -78.024817, 'count': 6},
{'zip_zone': u'Semi Run', 'zipcode': u'14711', 'longitude': -78.119974, 'count': 7},
{'zip_zone': u'Full Run', 'zipcode': u'14714', 'longitude': -78.256921, 'count': 4},
{'zip_zone': u'Half Run', 'zipcode': u'14715', 'longitude': -78.157392, 'count': 6},
{'zip_zone': u'Semi Run', 'zipcode': u'14717', 'longitude': -78.210567, 'count': 7},
{'zip_zone': u'Semi Run', 'zipcode': u'14719', 'longitude': -78.86951, 'count': 7},
{'zip_zone': u'Half Run', 'zipcode': u'14727', 'longitude': -78.268103, 'count': 6},
{'zip_zone': u'Semi Run', 'zipcode': u'14731', 'longitude': -78.658909, 'count': 7},
{'zip_zone': u'Half Run', 'zipcode': u'14735', 'longitude': -78.087607, 'count': 6},
{'zip_zone': None, 'zipcode': u'14737', 'longitude': -78.431625, 'count': 0},
{'zip_zone': u'Semi Run', 'zipcode': u'14739', 'longitude': -78.139046, 'count': 7},
{'zip_zone': u'Semi Run', 'zipcode': u'14741', 'longitude': -78.5907, 'count': 7},
{'zip_zone': u'Special Run', 'zipcode': u'14743', 'longitude': -78.4098, 'count': 4},
{'zip_zone': u'Special Run', 'zipcode': u'14744', 'longitude': -78.167853, 'count': 4},
{'zip_zone': u'Half Run', 'zipcode': u'14748', 'longitude': -78.639987, 'count': 6},
{'zip_zone': u'Semi Run', 'zipcode': u'14753', 'longitude': -78.640416, 'count': 7},
{'zip_zone': u'Special Run', 'zipcode': u'14754', 'longitude': -78.18395, 'count': 4},
{'zip_zone': u'Special Run', 'zipcode': u'14755', 'longitude': -78.800866, 'count': 4},
{'zip_zone': u'Half Run', 'zipcode': u'14760', 'longitude': -78.426015, 'count': 6},
]
This is a great use case for the Counter class in Python's collections module. 对于Python的collections模块中的Counter类,这是一个很好的用例。
import collections
# u is your input list of dictionaries, entries in u will be modified in place
c = collections.Counter(e["zip_zone"] for e in u)
for e in u:
e["count"] = c[e["zip_zone"]]
Maybe is not very beautiful but you can try to use defaultdict : 也许不是很漂亮,但是您可以尝试使用defaultdict :
from collections import defaultdict
output = defaultdict(list)
for line in origData:
output[line['zip_zone']].append(line)
for line in origData:
line['Count'] = len(output[line['zip_zone']])
print origData
I am not very sure your question, but following code may do what you want as expressed in the question: 我不太确定您的问题,但是下面的代码可以按照问题中的说明进行操作:
input = [
{'zip_zone': u'Full Run', 'zipcode': u'14042', 'longitude': -78.516154},
{'zip_zone': u'Full Run', 'zipcode': u'14101', 'longitude': -78.51734},
{'zip_zone': u'Full Run', 'zipcode': u'14706', 'longitude': -78.493761},
{'zip_zone': u'Half Run', 'zipcode': u'14709', 'longitude': -78.024817},
{'zip_zone': u'Semi Run', 'zipcode': u'14711', 'longitude': -78.119974},
{'zip_zone': u'Full Run', 'zipcode': u'14714', 'longitude': -78.256921},
{'zip_zone': u'Half Run', 'zipcode': u'14715', 'longitude': -78.157392},
{'zip_zone': u'Semi Run', 'zipcode': u'14717', 'longitude': -78.210567},
{'zip_zone': u'Semi Run', 'zipcode': u'14719', 'longitude': -78.86951},
{'zip_zone': u'Half Run', 'zipcode': u'14727', 'longitude': -78.268103},
{'zip_zone': u'Semi Run', 'zipcode': u'14731', 'longitude': -78.658909},
{'zip_zone': u'Half Run', 'zipcode': u'14735', 'longitude': -78.087607},
{'zip_zone': None, 'zipcode': u'14737', 'longitude': -78.431625},
{'zip_zone': u'Semi Run', 'zipcode': u'14739', 'longitude': -78.139046},
{'zip_zone': u'Semi Run', 'zipcode': u'14741', 'longitude': -78.5907},
{'zip_zone': u'Special Run', 'zipcode': u'14743', 'longitude': -78.4098},
{'zip_zone': u'Special Run', 'zipcode': u'14744', 'longitude': -78.167853},
{'zip_zone': u'Half Run', 'zipcode': u'14748', 'longitude': -78.639987},
{'zip_zone': u'Semi Run', 'zipcode': u'14753', 'longitude': -78.640416},
{'zip_zone': u'Special Run', 'zipcode': u'14754', 'longitude': -78.18395},
{'zip_zone': u'Special Run', 'zipcode': u'14755', 'longitude': -78.800866},
{'zip_zone': u'Half Run', 'zipcode': u'14760', 'longitude': -78.426015},
];
output=[];
zipZoneCnt={};
for item in input:
if item['zip_zone'] in zipZoneCnt.keys():
zipZoneCnt[item['zip_zone']]+=1;
else:
zipZoneCnt[item['zip_zone']]=1;
zipZoneCnt[None]=0;
for item in input:
item['count']=zipZoneCnt[item['zip_zone']];
print zipZoneCnt;
for item in input:
print item;
collections.Counter
to the rescue. collections.Counter
进行救援。
from collections import Counter
a = [
{'zip_zone': u'Full Run', 'zipcode': u'14042', 'longitude': -78.516154},
{'zip_zone': u'Full Run', 'zipcode': u'14101', 'longitude': -78.51734},
{'zip_zone': u'Full Run', 'zipcode': u'14706', 'longitude': -78.493761},
{'zip_zone': u'Half Run', 'zipcode': u'14709', 'longitude': -78.024817},
{'zip_zone': u'Semi Run', 'zipcode': u'14711', 'longitude': -78.119974},
]
# to obtain the counts:
c = Counter( x['zip_zone'] for x in a )
c
= Counter({u'Full Run': 3, u'Semi Run': 1, u'Half Run': 1})
# to update original structure in place:
for x in a:
x['count'] = c[x['zip_zone']]
a
[{'count': 3,
'longitude': -78.516154,
'zip_zone': u'Full Run',
'zipcode': u'14042'},
{'count': 3,
'longitude': -78.51734,
'zip_zone': u'Full Run',
'zipcode': u'14101'},
{'count': 3,
'longitude': -78.493761,
'zip_zone': u'Full Run',
'zipcode': u'14706'},
{'count': 1,
'longitude': -78.024817,
'zip_zone': u'Half Run',
'zipcode': u'14709'},
{'count': 1,
'longitude': -78.119974,
'zip_zone': u'Semi Run',
'zipcode': u'14711'}]
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