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pycrfpp

python CRF++实现分词

train and test

训练

训练数据采用1998年1月份人民日报的标注数据

tag => B M E S

训练模型调用接口

crf_model = CRFModel(model='model/model')

crf_model.crf_learn(filename='data/199801人民日报.data')

参数model为保存模型的路径, filename为标注数据路径

测试

crf_model = CRFModel(model='model/model')

data = crf_model.crf_test(tag_data=data)

测试结果

既往青霉素、链霉素、磺胺类药物过敏史<@>既_往_青霉素_、链_霉素、_磺_胺类_药物_过敏史

对“鸡蛋”等多种食物过敏<@>对_“鸡蛋”_等_多种_食物_过敏

对降脂药“非诺贝特”过敏<@>对_降脂_药_“非诺贝特”_过敏

有“青霉素”过敏史、食物过敏史<@>有_“青霉素过敏史、_食物_过敏史

对磺胺类、青霉素类及巴比妥类药物过敏<@>对_磺胺类_、_青霉_素类_及_巴比_妥类_药物_过敏

CRF++-0.58, python3安装方法

安装CRF++

解压CRF++-0.58.zip

cd CRF++-0.58

./configure

make

make install

终端输入: crf_learn, 出现如下信息则安装成功.

CRF++: Yet Another CRF Tool Kit

Copyright (C) 2005-2013 Taku Kudo, All rights reserved.

Usage: crf_learn [options] files

-f, --freq=INT use features that occuer no less than INT(default 1)

-m, --maxiter=INT set INT for max iterations in LBFGS routine(default 10k)

-c, --cost=FLOAT set FLOAT for cost parameter(default 1.0)

-e, --eta=FLOAT set FLOAT for termination criterion(default 0.0001)

-C, --convert convert text model to binary model

-t, --textmodel build also text model file for debugging

-a, --algorithm=(CRF|MIRA) select training algorithm

-p, --thread=INT number of threads (default auto-detect)

-H, --shrinking-size=INT set INT for number of iterations variable needs to be optimal before considered for shrinking. (default 20)

-v, --version show the version and exit

-h, --help show this help and exit

问题1

crf_learn

libcrfpp.so--cannot open shared object file: No such file or directory

1、用ln将需要的so文件链接到/usr/lib或者/lib这两个默认的目录下边

ln -s /where/you/install/lib/*.so /usr/lib

sudo ldconfig

2、修改LD_LIBRARY_PATH

export LD_LIBRARY_PATH=/where/you/install/lib:$LD_LIBRARY_PATH

sudo ldconfig

3、修改/etc/ld.so.conf,然后刷新

vim /etc/ld.so.conf

add /where/you/install/lib

sudo ldconfig

默认安装路径为 /usr/local/lib

问题2

/usr/lib64/libstdc++.so.6: version `GLIBCXX_3.4.20' not found (required by */3rd-party/protobuf-2.4.1/src/.libs/libprotoc.so.7)

解决方案步骤:

1、下载:libstdc++.so.6.0.20, 复制到/usr/local/lib64/

(libstdc++.so.6.0.20在test目录下)

2、sudo cp /usr/local/lib64/libstdc++.so.6.0.20 /usr/lib64

3、sudo rm -rf /usr/lib64/libstdc++.so.6

4、sudo ln -s /usr/lib64/libstdc++.so.6.0.20 /usr/lib64/libstdc++.so.6

安装python3 CRFPP接口

cd python

python3 setup.py build

python3 setup.py install

测试, cd test

python3 test.py

结果:

测试python3 CRFPP...

只 B

有 E

站 S

在 S

百 B

姓 E

的 S

出 B

发 M

点 E

, S

达 B

到 E

“ S

你 S

就 S

是 S

我 S

、 S

我 S

就 S

是 S

你 S

” S

, S

才 S

可 B

能 E

把 S

工 B

作 E

真 B

正 E

做 S

到 B

位 E

。 S

已成功安装python3 CRFPP!

问题1:

running install

running build

running build_py

running build_ext

building '_CRFPP' extension

x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -I/usr/include/python3.5m -c CRFPP_wrap.cxx -o build/temp.linux-x86_64-3.5/CRFPP_wrap.o

cc1plus: warning: command line option ‘-Wstrict-prototypes’ is valid for C/ObjC but not for C++

CRFPP_wrap.cxx:149:20: fatal error: Python.h: 没有那个文件或目录

compilation terminated.

error: command 'x86_64-linux-gnu-gcc' failed with exit status 1

解决方法

安装apt-get install python3-dev

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