Python3处理文件中每个词的方法

本文实例讲述了Python3处理文件中每个词的方法。分享给大家供大家参考。具体实现方法如下：

    ''''' 
    Created on Dec 21, 2012 
    处理文件中的每个词 
    @author: liury_lab 
    ''' 
    import codecs 
    the_file = codecs.open('d:/text.txt', 'rU', 'UTF-8') 
    for line in the_file: 
      for word in line.split(): 
        print(word, end = "|") 
    the_file.close() 
    # 若词的定义有变，可使用正则表达式 
    # 如词被定义为数字字母，连字符或单引号构成的序列 
    import re 
    the_file = codecs.open('d:/text.txt', 'rU', 'UTF-8') 
    print() 
    print('************************************************************************') 
    re_word = re.compile('[\w\'-]+') 
    for line in the_file: 
      for word in re_word.finditer(line): 
        print(word.group(0), end = "|") 
    the_file.close() 
    # 封装成迭代器 
    def words_of_file(file_path, line_to_words = str.split): 
      the_file = codecs.open('d:/text.txt', 'rU', 'UTF-8') 
      for line in the_file: 
        for word in line_to_words(line): 
          yield word 
      the_file.close() 
    print() 
    print('************************************************************************') 
    for word in words_of_file('d:/text.txt'): 
      print(word, end = '|') 
    def words_by_re(file_path, repattern = '[\w\'-]+'): 
      the_file = codecs.open('d:/text.txt', 'rU', 'UTF-8') 
      re_word = re.compile('[\w\'-]+') 

      def line_to_words(line): 
        for mo in re_word.finditer(line): 
          yield mo.group(0) # 原书为return，发现结果不对，改为yield 
      return words_of_file(file_path, line_to_words) 
    print() 
    print('************************************************************************') 
    for word in words_by_re('d:/text.txt'): 
      print(word, end = '|')

希望本文所述对大家的Python程序设计有所帮助。