FMM和BMM的python代码实现

FMM和BMM的python代码实现

1. FMM和BMM的编程实现，其实两个算法思路都挺简单，一个是从前取最大词长度的小分句，查找字典是否有该词，若无则分句去掉最后面一个字，再次查找，直至分句变成单词或者在字典中找到，并将其去除，然后重复上述步骤。BMM则是从后取分句，字典中不存在则分句最前去掉一个字，也是重复类似的步骤。

2. readCorpus.py

   import sys
   output = {}
   with open('语料库.txt', mode='r', encoding='UTF-8') as f:
       for line in f.readlines():
           if line is not None:
               # 去除每行的换行符
               t_line = line.strip('\n')
               # 按空格分开每个词
               words = t_line.split(' ')
               for word in words:
                   # 按/分开标记和词
                   t_word = word.split('/')
                   # 左方括号去除
                   tf_word = t_word[0].split('[')
                   if len(tf_word) == 2:
                       f_word = tf_word[1]
                   else:
                       f_word = t_word[0]
                   # 若在输出字典中，则value+1
                   if f_word in output.keys():
                       output[f_word] = output[f_word]+1
                   # 不在输出字典中则新建
                   else:
                       output[f_word] = 1
               big_word1 = t_line.split('[')
               for i in range(1, len(big_word1)):
                   big_word2 = big_word1[i].split(']')[0]
                   words = big_word2.split(' ')
                   big_word = ""
                   for word in words:
                       # 按/分开标记和词
                       t_word = word.split('/')
                       big_word = big_word + t_word[0]
                   # 若在输出字典中，则value+1
                   if big_word in output.keys():
                       output[big_word] = output[big_word]+1
                   # 不在输出字典中则新建
                   else:
                       output[big_word] = 1
   
   f.close()
   
   with open('output.txt', mode='w', encoding='UTF-8') as f:
       while output:
           minNum = sys.maxsize
           minName = ""
           for key, values in output.items():
               if values < minNum:
                   minNum = values
                   minName = key
           f.write(minName+": "+str(minNum)+"\n")
           del output[minName]
   f.close()
   
   

3. BMM.py

   MAX_WORD = 19
   word_list = []
   ans_word = []
   with open('output.txt', mode='r', encoding='UTF-8')as f:
       for line in f.readlines():
           if line is not None:
               word = line.split(':')
               word_list.append(word[0])
   f.close()
   #num = input("输入句子个数：")
   #for i in range(int(num)):
   while True:
       ans_word = []
       try:
           origin_sentence = input("输入：\n")
           while len(origin_sentence) != 0:
               len_word = MAX_WORD
               while len_word > 0:
                   # 从后读取最大词长度的数据，若该数据在字典中，则存入数组，并将其去除
                   if origin_sentence[-len_word:] in word_list:
                       ans_word.append(origin_sentence[-len_word:])
                       len_sentence = len(origin_sentence)
                       origin_sentence = origin_sentence[0:len_sentence-len_word]
                       break
                   # 不在词典中，则从后取词长度-1
                   else:
                       len_word = len_word - 1
               # 单词直接存入数组
               if len_word == 0:
                   if origin_sentence[-1:] != ' ':
                       ans_word.append(origin_sentence[-1:])
                   len_sentence = len(origin_sentence)
                   origin_sentence = origin_sentence[0:len_sentence - 1]
           for j in range(len(ans_word)-1, -1, -1):
               print(ans_word[j] + '/', end='')
           print('\n')
       except (KeyboardInterrupt, EOFError):
           break
   
   

4. FMM.py

   MAX_WORD = 19
   word_list = []
   with open('output.txt', mode='r', encoding='UTF-8')as f:
       for line in f.readlines():
           if line is not None:
               word = line.split(':')
               word_list.append(word[0])
   f.close()
   #num = input("输入句子个数：")
   #for i in range(int(num)):
   while True:
       try:
           origin_sentence = input("输入：\n")
           while len(origin_sentence) != 0:
               len_word = MAX_WORD
               while len_word > 0:
                   # 读取前最大词长度数据，在数组中则输出，并将其去除
                   if origin_sentence[0:len_word] in word_list:
                       print(origin_sentence[0:len_word]+'/', end='')
                       origin_sentence = origin_sentence[len_word:]
                       break
                   # 不在字典中，则读取长度-1
                   else:
                       len_word = len_word - 1
               # 为0则表示为单词，输出
               if len_word == 0:
                   if origin_sentence[0] != ' ':
                       print(origin_sentence[0]+'/', end='')
                   origin_sentence = origin_sentence[1:]
           print('\n')
       except (KeyboardInterrupt, EOFError):
           break
   
   

5. 效果图

• BMM.py（不含大粒度分词）

• BMM.py（含大粒度分词）

• FMM.py（不含大粒度分词）

• FMM.py（含大粒度分词）

我们可以观察到含大粒度分词的情况将香港科技大学，北京航空航天大学等表意能力强的词分在了一起而不是拆开，更符合分词要求。