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ZH奶酪:自然语言处理工具LTP语言云调用方法

2015-06-18 10:28 651 查看
前言

LTP语言云平台

不支持离线调用;

  支持分词、词性标注、命名实体识别、依存句法分析、语义角色标注;

  不支持自定义词表,但是你可以先用其他支持自定义分词的工具(例如中科院的NLPIR)把文本进行分词,再让ltp帮你标注

支持C#、Go、Java、JavaScript、Nodejs、PHP、Python、R、Ruby等语言调用;  

还有一些错误响应频率限制重要说明(这几个我至今也没用到);

正文

官方网址:http://www.ltp-cloud.com/

使用文档:http://www.ltp-cloud.com/document/

在线演示:http://www.ltp-cloud.com/demo/

各种语言调用实例可以到Github上下载:https://github.com/HIT-SCIR/ltp-cloud-api-tutorial

例如Python版本的:https://github.com/HIT-SCIR/ltp-cloud-api-tutorial/tree/master/Python

Step1:注册

这个网址申请一个API key,稍后会用到;

Step2:一个简单的例子(Python版)

(1)复制代码:从Github上复制一段代码(取决于你使用的语言和所需的功能)

(2)修改代码:

  <1>把 api_key = "YourApiKey" 中的 "YourApiKey" 修改成你Step1申请的API Key;

  <2>把 text = "我爱北京天安门" 修改成你要处理的文本;

  <3>根据需求设置不同的参数(其实只需要api_key,text,pattern,format四个参数就够了,仔细看下pattern):

   


# -*- coding: utf-8 -*-
#!/usr/bin/env python

# This example shows how to use Python to access the LTP API to perform full
# stack Chinese text analysis including word segmentation, POS tagging, dep-
# endency parsing, name entity recognization and semantic role labeling and
# get the result in specified format.

import urllib2, urllib
import sys

if __name__ == '__main__':
if len(sys.argv) < 2 or sys.argv[1] not in ["xml", "json", "conll"]:
print >> sys.stderr, "usage: %s [xml/json/conll]" % sys.argv[0]
sys.exit(1)

uri_base = "http://ltpapi.voicecloud.cn/analysis/?"
api_key  = "YourApiKey"
text     = "我爱北京天安门"
# Note that if your text contain special characters such as linefeed or '&',
# you need to use urlencode to encode your data
text     = urllib.quote(text)
format   = sys.argv[1]
pattern  = "all"

url      = (uri_base
+ "api_key=" + api_key + "&"
+ "text="    + text    + "&"
+ "format="  + format  + "&"
+ "pattern=" + "all")

try:
response = urllib2.urlopen(url)
content  = response.read().strip()
print content
except urllib2.HTTPError, e:
print >> sys.stderr, e.reason


Step3:运行

如果要批量处理txt或者xml文件,需要自己写一段批量处理的代码,下边是我之前项目中用到的一段批量处理某一目录下txt文件代码(就是加了一层循环和设置了一个输出):

# -*- coding: utf-8 -*-
#!/usr/bin/env python

# This example shows how to use Python to access the LTP API to perform full
# stack Chinese text analysis including word segmentation, POS tagging, dep-
# endency parsing, name entity recognization and semantic role labeling and
# get the result in specified format.

import urllib2, urllib
import sys

if __name__ == '__main__':
uri_base = "http://ltpapi.voicecloud.cn/analysis/?"
api_key  = "7132G4z1HE3S********DSxtNcmA1jScSE5XumAI"

f = open("E:\\PyProj\\Others\\rite_sentence.txt")
fw = open("E:\\PyProj\\Others\\rite_pos.txt",'w')

line = f.readline()
while(line):
text     = line
# Note that if your text contain special characters such as linefeed or '&',
# you need to use urlencode to encode your data
text     = urllib.quote(text)
format   = "plain"
pattern  = "pos"

url      = (uri_base
+ "api_key=" + api_key + "&"
+ "text="    + text    + "&"
+ "format="  + format  + "&"
+ "pattern=" + pattern)

try:
response = urllib2.urlopen(url)
content  = response.read().strip()
print content
fw.write(line+content+'\n')
except urllib2.HTTPError, e:
print >> sys.stderr, e.reason
line = f.readline()
fw.close()
f.close()
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