我正在尝试使用 OpenCalais 标记内容。以下是我正在使用与 API 通信的代码：
import httplib2
import json
import ast
# Some local values needed for the call
LOCAL_API_KEY = '***********************' # Aquire this by registering at the Calais site
CALAIS_TAG_API = 'https://api.thomsonreuters.com/permid/calais'
# Some sample text from a news story to pass to Calais for analysis
test_body = 'Samsung is closing its Milk Music streaming service'
# header information need by Calais.
# For more info see http://www.opencalais.com/documentation/calais-web-service-api/api-invocation/rest
headers = {
'X-AG-Access-Token': LOCAL_API_KEY,
'Content-Type': 'text/raw',
'outputFormat': 'application/json',
}
# Create your http object
http = httplib2.Http()
# Make the http post request, passing the body and headers as needed.
response, content = http.request(CALAIS_TAG_API, 'POST', headers=headers, body=test_body)
jcontent = json.loads(content) # Parse the json return into a python dict
output = json.dumps(jcontent, indent=4) # Pretty print the resulting dictionary returned.
print output
无论如何，这很好用，因为我能够获得以下输出（打印输出）。
{
"http://d.opencalais.com/dochash-1/8a7adab6-d07e-38e6-b0c9-5db5220336c1/cat/1": {
"score": 1,
"forenduserdisplay": "false",
"name": "Business_Finance",
"_typeGroup": "topics"
},
"http://d.opencalais.com/dochash-1/8a7adab6-d07e-38e6-b0c9-5db5220336c1/cat/2": {
"score": 1,
"forenduserdisplay": "false",
"name": "Entertainment_Culture",
"_typeGroup": "topics"
},
"http://d.opencalais.com/dochash-1/8a7adab6-d07e-38e6-b0c9-5db5220336c1/lid/DefaultLangId": {
"forenduserdisplay": "false",
"language": "http://d.opencalais.com/lid/DefaultLangId/InputTextTooShort",
"_typeGroup": "language"
},
"http://d.opencalais.com/dochash-1/8a7adab6-d07e-38e6-b0c9-5db5220336c1/Industry/1": {
"name": "Phones & Handheld Devices - NEC",
"permid": "4294951233",
"forenduserdisplay": "false",
"_typeGroup": "industry",
"relevance": 0.8,
"rcscode": "B:1768"
},
"http://d.opencalais.com/comphash-1/c021d644-16e9-3060-96fe-b3be0cd4ae1e": {
"_typeReference": "http://s.opencalais.com/1/type/em/e/Company",
"_type": "Company",
"name": "Samsung",
"confidence": {
"aggregate": "0.905",
"resolution": "1.0",
"statisticalfeature": "0.876",
"dblookup": "0.0"
},
"_typeGroup": "entities",
"instances": [
{
"detection": "[]Samsung[ is closing its Milk Music streaming]",
"length": 7,
"exact": "Samsung",
"suffix": " is closing its Milk Music streaming",
"offset": 0
}
],
"confidencelevel": "0.905",
"relevance": 0.8,
"nationality": "N/A",
"resolutions": [
{
"name": "SAMSUNG ELECTRONICS CO,.LTD",
"permid": "4295882451",
"commonname": "Samsung Elec",
"primaryric": "005930.KS",
"score": 1,
"ticker": "005930",
"id": "https://permid.org/1-4295882451"
}
],
"forenduserdisplay": "false"
},
"doc": {
"info": {
"document": "Samsung is closing its Milk Music streaming service",
"docId": "http://d.opencalais.com/dochash-1/8a7adab6-d07e-38e6-b0c9-5db5220336c1",
"docDate": "2016-08-22 13:02:01.814",
"docTitle": "",
"ontology": "http://mdaas-virtual-onecalais.int.thomsonreuters.com/owlschema/9.8/onecalais.owl.allmetadata.xml",
"calaisRequestID": "eef490a6-2e3e-7cac-156b-257ebcf3beba",
"id": "http://id.opencalais.com/b*RzenPxfvWZmjCvQqpzNA"
},
"meta": {
"stagsVer": "OneCalais_9.8-RELEASE-b6-2016-07-18_14:00:15",
"contentType": "text/raw",
"language": "InputTextTooShort",
"serverVersion": "OneCalais_9.8-RELEASE:109",
"submissionDate": "2016-08-22 13:02:01.679",
"processingVer": "AllMetadata",
"submitterCode": "0ca6a864-5659-789d-5f32-f365f695e757",
"signature": "digestalg-1|BovyytInhxJhSerNjEFvOZNAHJQ=|Q5g9GCOSi7+FnERjgY9y4B9oJukYPjYeTl6v+Zu81BJLwOBcIZZ/eA=="
}
},
"http://d.opencalais.com/dochash-1/8a7adab6-d07e-38e6-b0c9-5db5220336c1/ComponentVersions": {
"version": [
"Deals Index:201608221149:201608221149",
"index-refineries:201608202306:201608202306",
"config-physicalAssets-powerStations:480:480",
"OA Index:201608212349:201608212349",
"NextTags:OneCalais_9.8-RELEASE:109",
"config-sca-DataPackage:38:38",
"com.clearforest.infoext.dial4j.plugins-basistechconfig:OneCalais_9.8-RELEASE:109",
"People Index:201608221124:201608221124",
"config-negativeSignature:480:480",
"Dial4J:OneCalais_8.6-RELEASE:209",
"OA Override:507:507",
"People Override:480:480",
"index-vessels:201608201644:201608201644",
"config-refineries:480:480",
"config-cse:507:507",
"config-vessels:480:480",
"OneCalais:OneCalais_9.8-RELEASE:109",
"config-physicalAssets-mines:480:480",
"SocialTags Index:201608212334:201608212334",
"BlackList:504:504",
"index-ports:201608202256:201608202256",
"config-physicalAssets-ports:480:480",
"config-drugs:480:480"
],
"_typeGroup": "versions"
},
"http://d.opencalais.com/comphash-1/e89d0187-8b46-3f8d-9f6b-4995a709c85e": {
"_typeReference": "http://s.opencalais.com/1/type/em/e/Company",
"_type": "Company",
"name": "Milk Music",
"confidence": {
"aggregate": "0.499",
"resolution": "0.0",
"statisticalfeature": "0.775",
"dblookup": "0.0"
},
"_typeGroup": "entities",
"instances": [
{
"suffix": " streaming service",
"prefix": "Samsung is closing its ",
"detection": "[Samsung is closing its ]Milk Music[ streaming service]",
"length": 10,
"offset": 23,
"exact": "Milk Music"
}
],
"confidencelevel": "0.499",
"relevance": 0.8,
"nationality": "N/A",
"forenduserdisplay": "false"
},
"http://d.opencalais.com/dochash-1/8a7adab6-d07e-38e6-b0c9-5db5220336c1/cat/3": {
"score": 1,
"forenduserdisplay": "false",
"name": "Technology_Internet",
"_typeGroup": "topics"
},
"http://d.opencalais.com/dochash-1/8a7adab6-d07e-38e6-b0c9-5db5220336c1/SocialTag/1": {
"name": "Streaming music services",
"importance": "1",
"_typeGroup": "socialTag",
"originalValue": "Streaming music services",
"socialTag": "http://d.opencalais.com/genericHasher-1/d1447a37-4c52-3b2f-a9d2-40984014685b",
"forenduserdisplay": "true",
"id": "http://d.opencalais.com/dochash-1/8a7adab6-d07e-38e6-b0c9-5db5220336c1/SocialTag/1"
},
"http://d.opencalais.com/dochash-1/8a7adab6-d07e-38e6-b0c9-5db5220336c1/SocialTag/3": {
"name": "Milk Music",
"importance": "1",
"_typeGroup": "socialTag",
"originalValue": "Milk Music (streaming service)",
"socialTag": "http://d.opencalais.com/genericHasher-1/471ee9b8-9f72-3a81-aa13-2a7d44658521",
"forenduserdisplay": "true",
"id": "http://d.opencalais.com/dochash-1/8a7adab6-d07e-38e6-b0c9-5db5220336c1/SocialTag/3"
},
"http://d.opencalais.com/dochash-1/8a7adab6-d07e-38e6-b0c9-5db5220336c1/SocialTag/2": {
"name": "Digital audio",
"importance": "1",
"_typeGroup": "socialTag",
"originalValue": "Digital audio",
"socialTag": "http://d.opencalais.com/genericHasher-1/64447afb-045b-34db-9a52-dae5bed0254e",
"forenduserdisplay": "true",
"id": "http://d.opencalais.com/dochash-1/8a7adab6-d07e-38e6-b0c9-5db5220336c1/SocialTag/2"
},
"http://d.opencalais.com/dochash-1/8a7adab6-d07e-38e6-b0c9-5db5220336c1/SocialTag/5": {
"name": "Smartphones",
"importance": "2",
"_typeGroup": "socialTag",
"originalValue": "Smartphones",
"socialTag": "http://d.opencalais.com/genericHasher-1/e42d9d7b-150b-3c30-974f-87a1fba000ef",
"forenduserdisplay": "true",
"id": "http://d.opencalais.com/dochash-1/8a7adab6-d07e-38e6-b0c9-5db5220336c1/SocialTag/5"
},
"http://d.opencalais.com/dochash-1/8a7adab6-d07e-38e6-b0c9-5db5220336c1/SocialTag/4": {
"name": "Samsung",
"importance": "2",
"_typeGroup": "socialTag",
"originalValue": "Samsung",
"socialTag": "http://d.opencalais.com/genericHasher-1/97370f53-c2f8-31b8-bbcf-aa685e504714",
"forenduserdisplay": "true",
"id": "http://d.opencalais.com/dochash-1/8a7adab6-d07e-38e6-b0c9-5db5220336c1/SocialTag/4"
},
"http://d.opencalais.com/dochash-1/8a7adab6-d07e-38e6-b0c9-5db5220336c1/SocialTag/7": {
"name": "Samsung Galaxy",
"importance": "2",
"_typeGroup": "socialTag",
"originalValue": "Samsung Galaxy",
"socialTag": "http://d.opencalais.com/genericHasher-1/64b8e664-bbdc-3731-b712-eb30990eab6f",
"forenduserdisplay": "true",
"id": "http://d.opencalais.com/dochash-1/8a7adab6-d07e-38e6-b0c9-5db5220336c1/SocialTag/7"
},
"http://d.opencalais.com/dochash-1/8a7adab6-d07e-38e6-b0c9-5db5220336c1/SocialTag/6": {
"name": "Samsung Music Hub",
"importance": "2",
"_typeGroup": "socialTag",
"originalValue": "Samsung Music Hub",
"socialTag": "http://d.opencalais.com/genericHasher-1/a3310a01-ef6f-314e-90b2-a303822b965c",
"forenduserdisplay": "true",
"id": "http://d.opencalais.com/dochash-1/8a7adab6-d07e-38e6-b0c9-5db5220336c1/SocialTag/6"
}
}
我注意到的是键都是超链接。无论如何，我想从输出中打印所有的 socialTags。为此，我编写了以下代码：
# Print all the social tags
for key, value in ast.literal_eval(output).items():
if value["_typeGroup"] == 'socialTag':
print value["name"]
但是，我收到此错误：
Traceback (most recent call last):
File "opencal.py", line 30, in <module>
if value["_typeGroup"] == 'socialTag':
KeyError: '_typeGroup'
这是什么错误？或者更准确地说，获取 socialTags 的正确方法是什么？谢谢。