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#!/usr/bin/env python
# Copyright 2013 AlchemyAPI
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from __future__ import print_function
try:
from urllib.request import urlopen
from urllib.parse import urlparse
from urllib.parse import urlencode
except ImportError:
from urlparse import urlparse
from urllib2 import urlopen
from urllib import urlencode
try:
import json
except ImportError:
#Older versions of Python (i.e. 2.4) require simplejson instead of json
import simplejson as json
if __name__ == '__main__':
"""
Writes the API key to api_key.txt file. It will create the file if it doesn't exist.
This function is intended to be called from the Python command line using: python alchemyapi YOUR_API_KEY
If you don't have an API key yet, register for one at: http://www.alchemyapi.com/api/register.html
INPUT:
argv[1] -> Your API key from AlchemyAPI. Should be 40 hex characters
OUTPUT:
none
"""
import sys
if len(sys.argv) == 2 and sys.argv[1]:
if len(sys.argv[1]) == 40:
#write the key to the file
f = open('api_key.txt','w')
f.write(sys.argv[1])
f.close()
print('Key: ' + sys.argv[1] + ' was written to api_key.txt')
print('You are now ready to start using AlchemyAPI. For an example, run: python example.py')
else:
print('The key appears to invalid. Please make sure to use the 40 character key assigned by AlchemyAPI')
class AlchemyAPI:
#Setup the endpoints
ENDPOINTS = {}
ENDPOINTS['sentiment'] = {}
ENDPOINTS['sentiment']['url'] = '/url/URLGetTextSentiment'
ENDPOINTS['sentiment']['text'] = '/text/TextGetTextSentiment'
ENDPOINTS['sentiment']['html'] = '/html/HTMLGetTextSentiment'
ENDPOINTS['sentiment_targeted'] = {}
ENDPOINTS['sentiment_targeted']['url'] = '/url/URLGetTargetedSentiment'
ENDPOINTS['sentiment_targeted']['text'] = '/text/TextGetTargetedSentiment'
ENDPOINTS['sentiment_targeted']['html'] = '/html/HTMLGetTargetedSentiment'
ENDPOINTS['author'] = {}
ENDPOINTS['author']['url'] = '/url/URLGetAuthor'
ENDPOINTS['author']['html'] = '/html/HTMLGetAuthor'
ENDPOINTS['keywords'] = {}
ENDPOINTS['keywords']['url'] = '/url/URLGetRankedKeywords'
ENDPOINTS['keywords']['text'] = '/text/TextGetRankedKeywords'
ENDPOINTS['keywords']['html'] = '/html/HTMLGetRankedKeywords'
ENDPOINTS['concepts'] = {}
ENDPOINTS['concepts']['url'] = '/url/URLGetRankedConcepts'
ENDPOINTS['concepts']['text'] = '/text/TextGetRankedConcepts'
ENDPOINTS['concepts']['html'] = '/html/HTMLGetRankedConcepts'
ENDPOINTS['entities'] = {}
ENDPOINTS['entities']['url'] = '/url/URLGetRankedNamedEntities'
ENDPOINTS['entities']['text'] = '/text/TextGetRankedNamedEntities'
ENDPOINTS['entities']['html'] = '/html/HTMLGetRankedNamedEntities'
ENDPOINTS['category'] = {}
ENDPOINTS['category']['url'] = '/url/URLGetCategory'
ENDPOINTS['category']['text'] = '/text/TextGetCategory'
ENDPOINTS['category']['html'] = '/html/HTMLGetCategory'
ENDPOINTS['relations'] = {}
ENDPOINTS['relations']['url'] = '/url/URLGetRelations'
ENDPOINTS['relations']['text'] = '/text/TextGetRelations'
ENDPOINTS['relations']['html'] = '/html/HTMLGetRelations'
ENDPOINTS['language'] = {}
ENDPOINTS['language']['url'] = '/url/URLGetLanguage'
ENDPOINTS['language']['text'] = '/text/TextGetLanguage'
ENDPOINTS['language']['html'] = '/html/HTMLGetLanguage'
ENDPOINTS['text'] = {}
ENDPOINTS['text']['url'] = '/url/URLGetText'
ENDPOINTS['text']['html'] = '/html/HTMLGetText'
ENDPOINTS['text_raw'] = {}
ENDPOINTS['text_raw']['url'] = '/url/URLGetRawText'
ENDPOINTS['text_raw']['html'] = '/html/HTMLGetRawText'
ENDPOINTS['title'] = {}
ENDPOINTS['title']['url'] = '/url/URLGetTitle'
ENDPOINTS['title']['html'] = '/html/HTMLGetTitle'
ENDPOINTS['feeds'] = {}
ENDPOINTS['feeds']['url'] = '/url/URLGetFeedLinks'
ENDPOINTS['feeds']['html'] = '/html/HTMLGetFeedLinks'
ENDPOINTS['microformats'] = {}
ENDPOINTS['microformats']['url'] = '/url/URLGetMicroformatData'
ENDPOINTS['microformats']['html'] = '/html/HTMLGetMicroformatData'
#The base URL for all endpoints
BASE_URL = 'http://access.alchemyapi.com/calls'
def __init__(self):
"""
Initializes the SDK so it can send requests to AlchemyAPI for analysis.
It loads the API key from api_key.txt and configures the endpoints.
"""
import sys
try:
# Open the key file and read the key
f = open("api_key.txt", "r")
key = f.read().strip()
if key == '':
#The key file should't be blank
print('The api_key.txt file appears to be blank, please run: python alchemyapi.py YOUR_KEY_HERE')
print('If you do not have an API Key from AlchemyAPI, please register for one at: http://www.alchemyapi.com/api/register.html')
sys.exit(0)
elif len(key) != 40:
#Keys should be exactly 40 characters long
print('It appears that the key in api_key.txt is invalid. Please make sure the file only includes the API key, and it is the correct one.')
sys.exit(0)
else:
#setup the key
self.apikey = key
# Close file
f.close()
except IOError:
#The file doesn't exist, so show the message and create the file.
print('API Key not found! Please run: python alchemyapi.py YOUR_KEY_HERE')
print('If you do not have an API Key from AlchemyAPI, please register for one at: http://www.alchemyapi.com/api/register.html')
#create a blank key file
open('api_key.txt', 'a').close()
sys.exit(0)
except Exception as e:
print(e)
def entities(self, flavor, data, options={}):
"""
Extracts the entities for text, a URL or HTML.
For an overview, please refer to: http://www.alchemyapi.com/products/features/entity-extraction/
For the docs, please refer to: http://www.alchemyapi.com/api/entity-extraction/
INPUT:
flavor -> which version of the call, i.e. text, url or html.
data -> the data to analyze, either the text, the url or html code.
options -> various parameters that can be used to adjust how the API works, see below for more info on the available options.
Available Options:
disambiguate -> disambiguate entities (i.e. Apple the company vs. apple the fruit). 0: disabled, 1: enabled (default)
linkedData -> include linked data on disambiguated entities. 0: disabled, 1: enabled (default)
coreference -> resolve coreferences (i.e. the pronouns that correspond to named entities). 0: disabled, 1: enabled (default)
quotations -> extract quotations by entities. 0: disabled (default), 1: enabled.
sentiment -> analyze sentiment for each entity. 0: disabled (default), 1: enabled. Requires 1 additional API transction if enabled.
showSourceText -> 0: disabled (default), 1: enabled
maxRetrieve -> the maximum number of entities to retrieve (default: 50)
OUTPUT:
The response, already converted from JSON to a Python object.
"""
#Make sure this request supports this flavor
if flavor not in AlchemyAPI.ENDPOINTS['entities']:
return { 'status':'ERROR', 'statusInfo':'entity extraction for ' + flavor + ' not available' }
#add the data to the options and analyze
options[flavor] = data
return self.__analyze(AlchemyAPI.ENDPOINTS['entities'][flavor], options)
def keywords(self, flavor, data, options={}):
"""
Extracts the keywords from text, a URL or HTML.
For an overview, please refer to: http://www.alchemyapi.com/products/features/keyword-extraction/
For the docs, please refer to: http://www.alchemyapi.com/api/keyword-extraction/
INPUT:
flavor -> which version of the call, i.e. text, url or html.
data -> the data to analyze, either the text, the url or html code.
options -> various parameters that can be used to adjust how the API works, see below for more info on the available options.
Available Options:
keywordExtractMode -> normal (default), strict
sentiment -> analyze sentiment for each keyword. 0: disabled (default), 1: enabled. Requires 1 additional API transaction if enabled.
showSourceText -> 0: disabled (default), 1: enabled.
maxRetrieve -> the max number of keywords returned (default: 50)
OUTPUT:
The response, already converted from JSON to a Python object.
"""
#Make sure this request supports this flavor
if flavor not in AlchemyAPI.ENDPOINTS['keywords']:
return { 'status':'ERROR', 'statusInfo':'keyword extraction for ' + flavor + ' not available' }
#add the data to the options and analyze
options[flavor] = data
return self.__analyze(AlchemyAPI.ENDPOINTS['keywords'][flavor], options)
def concepts(self, flavor, data, options={}):
"""
Tags the concepts for text, a URL or HTML.
For an overview, please refer to: http://www.alchemyapi.com/products/features/concept-tagging/
For the docs, please refer to: http://www.alchemyapi.com/api/concept-tagging/
Available Options:
maxRetrieve -> the maximum number of concepts to retrieve (default: 8)
linkedData -> include linked data, 0: disabled, 1: enabled (default)
showSourceText -> 0:disabled (default), 1: enabled
OUTPUT:
The response, already converted from JSON to a Python object.
"""
#Make sure this request supports this flavor
if flavor not in AlchemyAPI.ENDPOINTS['concepts']:
return { 'status':'ERROR', 'statusInfo':'concept tagging for ' + flavor + ' not available' }
#add the data to the options and analyze
options[flavor] = data
return self.__analyze(AlchemyAPI.ENDPOINTS['concepts'][flavor], options)
def sentiment(self, flavor, data, options={}):
"""
Calculates the sentiment for text, a URL or HTML.
For an overview, please refer to: http://www.alchemyapi.com/products/features/sentiment-analysis/
For the docs, please refer to: http://www.alchemyapi.com/api/sentiment-analysis/
INPUT:
flavor -> which version of the call, i.e. text, url or html.
data -> the data to analyze, either the text, the url or html code.
options -> various parameters that can be used to adjust how the API works, see below for more info on the available options.
Available Options:
showSourceText -> 0: disabled (default), 1: enabled
OUTPUT:
The response, already converted from JSON to a Python object.
"""
#Make sure this request supports this flavor
if flavor not in AlchemyAPI.ENDPOINTS['sentiment']:
return { 'status':'ERROR', 'statusInfo':'sentiment analysis for ' + flavor + ' not available' }
#add the data to the options and analyze
options[flavor] = data
return self.__analyze(AlchemyAPI.ENDPOINTS['sentiment'][flavor], options)
def sentiment_targeted(self, flavor, data, target, options={}):
"""
Calculates the targeted sentiment for text, a URL or HTML.
For an overview, please refer to: http://www.alchemyapi.com/products/features/sentiment-analysis/
For the docs, please refer to: http://www.alchemyapi.com/api/sentiment-analysis/
INPUT:
flavor -> which version of the call, i.e. text, url or html.
data -> the data to analyze, either the text, the url or html code.
target -> the word or phrase to run sentiment analysis on.
options -> various parameters that can be used to adjust how the API works, see below for more info on the available options.
Available Options:
showSourceText -> 0: disabled, 1: enabled
OUTPUT:
The response, already converted from JSON to a Python object.
"""
#Make sure the target is valid
if target is None or target == '':
return { 'status':'ERROR', 'statusInfo':'targeted sentiment requires a non-null target' }
#Make sure this request supports this flavor
if flavor not in AlchemyAPI.ENDPOINTS['sentiment_targeted']:
return { 'status':'ERROR', 'statusInfo':'targeted sentiment analysis for ' + flavor + ' not available' }
#add the URL encoded data and target to the options and analyze
options[flavor] = data
options['target'] = target
return self.__analyze(AlchemyAPI.ENDPOINTS['sentiment_targeted'][flavor], options)
def text(self, flavor, data, options={}):
"""
Extracts the cleaned text (removes ads, navigation, etc.) for text, a URL or HTML.
For an overview, please refer to: http://www.alchemyapi.com/products/features/text-extraction/
For the docs, please refer to: http://www.alchemyapi.com/api/text-extraction/
INPUT:
flavor -> which version of the call, i.e. text, url or html.
data -> the data to analyze, either the text, the url or html code.
options -> various parameters that can be used to adjust how the API works, see below for more info on the available options.
Available Options:
useMetadata -> utilize meta description data, 0: disabled, 1: enabled (default)
extractLinks -> include links, 0: disabled (default), 1: enabled.
OUTPUT:
The response, already converted from JSON to a Python object.
"""
#Make sure this request supports this flavor
if flavor not in AlchemyAPI.ENDPOINTS['text']:
return { 'status':'ERROR', 'statusInfo':'clean text extraction for ' + flavor + ' not available' }
#add the data to the options and analyze
options[flavor] = data
return self.__analyze(AlchemyAPI.ENDPOINTS['text'][flavor], options)
def text_raw(self, flavor, data, options={}):
"""
Extracts the raw text (includes ads, navigation, etc.) for a URL or HTML.
For an overview, please refer to: http://www.alchemyapi.com/products/features/text-extraction/
For the docs, please refer to: http://www.alchemyapi.com/api/text-extraction/
INPUT:
flavor -> which version of the call, i.e. text, url or html.
data -> the data to analyze, either the text, the url or html code.
options -> various parameters that can be used to adjust how the API works, see below for more info on the available options.
Available Options:
none
OUTPUT:
The response, already converted from JSON to a Python object.
"""
#Make sure this request supports this flavor
if flavor not in AlchemyAPI.ENDPOINTS['text_raw']:
return { 'status':'ERROR', 'statusInfo':'raw text extraction for ' + flavor + ' not available' }
#add the data to the options and analyze
options[flavor] = data
return self.__analyze(AlchemyAPI.ENDPOINTS['text_raw'][flavor], options)
def author(self, flavor, data, options={}):
"""
Extracts the author from a URL or HTML.
For an overview, please refer to: http://www.alchemyapi.com/products/features/author-extraction/
For the docs, please refer to: http://www.alchemyapi.com/api/author-extraction/
INPUT:
flavor -> which version of the call, i.e. text, url or html.
data -> the data to analyze, either the text, the url or html code.
options -> various parameters that can be used to adjust how the API works, see below for more info on the available options.
Availble Options:
none
OUTPUT:
The response, already converted from JSON to a Python object.
"""
#Make sure this request supports this flavor
if flavor not in AlchemyAPI.ENDPOINTS['author']:
return { 'status':'ERROR', 'statusInfo':'author extraction for ' + flavor + ' not available' }
#add the data to the options and analyze
options[flavor] = data
return self.__analyze(AlchemyAPI.ENDPOINTS['author'][flavor], options)
def language(self, flavor, data, options={}):
"""
Detects the language for text, a URL or HTML.
For an overview, please refer to: http://www.alchemyapi.com/api/language-detection/
For the docs, please refer to: http://www.alchemyapi.com/products/features/language-detection/
INPUT:
flavor -> which version of the call, i.e. text, url or html.
data -> the data to analyze, either the text, the url or html code.
options -> various parameters that can be used to adjust how the API works, see below for more info on the available options.
Available Options:
none
OUTPUT:
The response, already converted from JSON to a Python object.
"""
#Make sure this request supports this flavor
if flavor not in AlchemyAPI.ENDPOINTS['language']:
return { 'status':'ERROR', 'statusInfo':'language detection for ' + flavor + ' not available' }
#add the data to the options and analyze
options[flavor] = data
return self.__analyze(AlchemyAPI.ENDPOINTS['language'][flavor], options)
def title(self, flavor, data, options={}):
"""
Extracts the title for a URL or HTML.
For an overview, please refer to: http://www.alchemyapi.com/products/features/text-extraction/
For the docs, please refer to: http://www.alchemyapi.com/api/text-extraction/
INPUT:
flavor -> which version of the call, i.e. text, url or html.
data -> the data to analyze, either the text, the url or html code.
options -> various parameters that can be used to adjust how the API works, see below for more info on the available options.
Available Options:
useMetadata -> utilize title info embedded in meta data, 0: disabled, 1: enabled (default)
OUTPUT:
The response, already converted from JSON to a Python object.
"""
#Make sure this request supports this flavor
if flavor not in AlchemyAPI.ENDPOINTS['title']:
return { 'status':'ERROR', 'statusInfo':'title extraction for ' + flavor + ' not available' }
#add the data to the options and analyze
options[flavor] = data
return self.__analyze(AlchemyAPI.ENDPOINTS['title'][flavor], options)
def relations(self, flavor, data, options={}):
"""
Extracts the relations for text, a URL or HTML.
For an overview, please refer to: http://www.alchemyapi.com/products/features/relation-extraction/
For the docs, please refer to: http://www.alchemyapi.com/api/relation-extraction/
INPUT:
flavor -> which version of the call, i.e. text, url or html.
data -> the data to analyze, either the text, the url or html code.
options -> various parameters that can be used to adjust how the API works, see below for more info on the available options.
Available Options:
sentiment -> 0: disabled (default), 1: enabled. Requires one additional API transaction if enabled.
keywords -> extract keywords from the subject and object. 0: disabled (default), 1: enabled. Requires one additional API transaction if enabled.
entities -> extract entities from the subject and object. 0: disabled (default), 1: enabled. Requires one additional API transaction if enabled.
requireEntities -> only extract relations that have entities. 0: disabled (default), 1: enabled.
sentimentExcludeEntities -> exclude full entity name in sentiment analysis. 0: disabled, 1: enabled (default)
disambiguate -> disambiguate entities (i.e. Apple the company vs. apple the fruit). 0: disabled, 1: enabled (default)
linkedData -> include linked data with disambiguated entities. 0: disabled, 1: enabled (default).
coreference -> resolve entity coreferences. 0: disabled, 1: enabled (default)
showSourceText -> 0: disabled (default), 1: enabled.
maxRetrieve -> the maximum number of relations to extract (default: 50, max: 100)
OUTPUT:
The response, already converted from JSON to a Python object.
"""
#Make sure this request supports this flavor
if flavor not in AlchemyAPI.ENDPOINTS['relations']:
return { 'status':'ERROR', 'statusInfo':'relation extraction for ' + flavor + ' not available' }
#add the data to the options and analyze
options[flavor] = data
return self.__analyze(AlchemyAPI.ENDPOINTS['relations'][flavor], options)
def category(self, flavor, data, options={}):
"""
Categorizes the text for text, a URL or HTML.
For an overview, please refer to: http://www.alchemyapi.com/products/features/text-categorization/
For the docs, please refer to: http://www.alchemyapi.com/api/text-categorization/
INPUT:
flavor -> which version of the call, i.e. text, url or html.
data -> the data to analyze, either the text, the url or html code.
options -> various parameters that can be used to adjust how the API works, see below for more info on the available options.
Available Options:
showSourceText -> 0: disabled (default), 1: enabled
OUTPUT:
The response, already converted from JSON to a Python object.
"""
#Make sure this request supports this flavor
if flavor not in AlchemyAPI.ENDPOINTS['category']:
return { 'status':'ERROR', 'statusInfo':'text categorization for ' + flavor + ' not available' }
#add the data to the options and analyze
options[flavor] = data
return self.__analyze(AlchemyAPI.ENDPOINTS['category'][flavor], options)
def feeds(self, flavor, data, options={}):
"""
Detects the RSS/ATOM feeds for a URL or HTML.
For an overview, please refer to: http://www.alchemyapi.com/products/features/feed-detection/
For the docs, please refer to: http://www.alchemyapi.com/api/feed-detection/
INPUT:
flavor -> which version of the call, i.e. url or html.
data -> the data to analyze, either the the url or html code.
options -> various parameters that can be used to adjust how the API works, see below for more info on the available options.
Available Options:
none
OUTPUT:
The response, already converted from JSON to a Python object.
"""
#Make sure this request supports this flavor
if flavor not in AlchemyAPI.ENDPOINTS['feeds']:
return { 'status':'ERROR', 'statusInfo':'feed detection for ' + flavor + ' not available' }
#add the data to the options and analyze
options[flavor] = data
return self.__analyze(AlchemyAPI.ENDPOINTS['feeds'][flavor], options)
def microformats(self, flavor, data, options={}):
"""
Parses the microformats for a URL or HTML.
For an overview, please refer to: http://www.alchemyapi.com/products/features/microformats-parsing/
For the docs, please refer to: http://www.alchemyapi.com/api/microformats-parsing/
INPUT:
flavor -> which version of the call, i.e. url or html.
data -> the data to analyze, either the the url or html code.
options -> various parameters that can be used to adjust how the API works, see below for more info on the available options.
Available Options:
none
OUTPUT:
The response, already converted from JSON to a Python object.
"""
#Make sure this request supports this flavor
if flavor not in AlchemyAPI.ENDPOINTS['microformats']:
return { 'status':'ERROR', 'statusInfo':'microformat extraction for ' + flavor + ' not available' }
#add the data to the options and analyze
options[flavor] = data
return self.__analyze(AlchemyAPI.ENDPOINTS['microformats'][flavor], options)
def __analyze(self, endpoint, params):
"""
HTTP Request wrapper that is called by the endpoint functions. This function is not intended to be called through an external interface.
It makes the call, then converts the returned JSON string into a Python object.
INPUT:
url -> the full URI encoded url
OUTPUT:
The response, already converted from JSON to a Python object.
"""
#Insert the base url
url = AlchemyAPI.BASE_URL + endpoint;
#Add the API Key and set the output mode to JSON
params['apikey'] = self.apikey;
params['outputMode'] = 'json';
try:
#build the request with uri encoding
page = urlopen(url, data=urlencode(params).encode('utf-8')).read().decode('utf-8')
return json.loads(page)
except Exception as e:
print(e)
return { 'status':'ERROR', 'statusInfo':'network-error' }