# coding:utf-8

import sys

import jieba

class WordToken(object):

def __init__(self):

# 最小起始id号, 保留的用于表示特殊标记

self.START_ID = 4

self.word2id_dict = {}

self.id2word_dict = {}

def load_file_list(self, file_list, min_freq):

"""

加载样本文件列表，全部切词后统计词频，按词频由高到低排序后顺次编号

并存到self.word2id_dict和self.id2word_dict中

"""

words_count = {}

for file in file_list:

with open(file, 'r') as file_object:

for line in file_object.readlines():

line = line.strip()

seg_list = jieba.cut(line)

for str in seg_list:

if str in words_count:

words_count[str] = words_count[str] + 1

else:

words_count[str] = 1

sorted_list = [[v[1], v[0]] for v in words_count.items()]

sorted_list.sort(reverse=True)

for index, item in enumerate(sorted_list):

word = item[1]

if item[0] < min_freq:

break

self.word2id_dict[word] = self.START_ID + index

self.id2word_dict[self.START_ID + index] = word

return index

def word2id(self, word):

if not isinstance(word, unicode):

print "Exception: error word not unicode"

sys.exit(1)

if word in self.word2id_dict:

return self.word2id_dict[word]

else:

return None

def id2word(self, id):

id = int(id)

if id in self.id2word_dict:

return self.id2word_dict[id]

else:

return None