#text.py#保留的字符keep = {‘a‘,‘b‘,‘c‘,‘d‘,‘e‘,‘f‘,‘g‘,‘h‘,‘i‘,‘j‘,‘k‘,‘l‘,‘m‘,‘n‘,‘o‘,‘p‘        ‘q‘,‘r‘,‘s‘,‘t‘,‘u‘,‘v‘,‘w‘,‘x‘,‘y‘,‘z‘,‘ ‘,‘-‘,"‘"}#将文本规范化 def normalize(s):     """Convert s to a normalized string."""    result = ‘‘    for c in s.lower():        if c in keep:            result += c    return result#获取文本基本信息def file_stats(fname):    """Print statistics for the given file."""    s = open(fname,‘r‘).read()    num_chars = len(s)    num_lines = s.count(‘\n‘)    num_words = len(normalize(s).split())    print("The file %s has:" % fname)    print("  %s characters" % num_chars)    print("  %s lines" % num_lines)    print("  %s words" % num_words)#将字符串转化为字典def make_freq_dict(s):    """Return a dictionary whose keys are the words of s,and whose values are the counts of those words."""    s = normalize(s)    words = s.split()    d = {}    for w in words:        if w in d:            d[w] += 1        else:            d[w] = 1    return d#获取文本基本信息def file_stats2(fname):    """Print statistics for the given file."""    s = open(fname,‘r‘).read()    num_chars = len(s)    num_lines = s.count(‘\n‘)    d = make_freq_dict(s)    num_words = sum(d[w] for w in d)    lst = [(d[w],w) for w in d]    lst.sort()    lst.reverse()    print("The file %s has:" % fname)    print("  %s characters" % num_chars)    print("  %s lines" % num_lines)    print("  %s words" % num_words)    print("\nThe top 10 most frequent words are:")    i = 1    for count,word in lst[:99]:        print(‘%2s. %4s %s‘ % (i, count, word))        i += 1

>>> file_stats2(‘a.txt‘)The file a.txt has:  12927 characters  297 lines  1645 wordsThe top 10 most frequent words are: 1.   62 to 2.   62 the 3.   47 is 4.   42 a 5.   41 of 6.   40 it 7.   36 that 8.   35 and 9.   32 as10.   24 so

#text.py#保留的字符keep = {‘a‘,‘b‘,‘c‘,‘d‘,‘e‘,‘f‘,‘g‘,‘h‘,‘i‘,‘j‘,‘k‘,‘l‘,‘m‘,‘n‘,‘o‘,‘p‘        ‘q‘,‘r‘,‘s‘,‘t‘,‘u‘,‘v‘,‘w‘,‘x‘,‘y‘,‘z‘,‘ ‘,‘-‘,"‘"}#将文本规范化 def normalize(s):     """Convert s to a normalized string."""    result = ‘‘    for c in s.lower():        if c in keep:            result += c    return result#获取文本基本信息def file_stats(fname):    """Print statistics for the given file."""    s = open(fname,‘r‘).read()    num_chars = len(s)    num_lines = s.count(‘\n‘)    num_words = len(normalize(s).split())    print("The file %s has:" % fname)    print("  %s characters" % num_chars)    print("  %s lines" % num_lines)    print("  %s words" % num_words)#将字符串转化为字典def make_freq_dict(s):    """Return a dictionary whose keys are the words of s,and whose values are the counts of those words."""    s = normalize(s)    words = s.split()    d = {}    for w in words:        if w in d:            d[w] += 1        else:            d[w] = 1    return d#获取文本基本信息def file_stats2(fname):    """Print statistics for the given file."""    s = open(fname,‘r‘).read()    num_chars = len(s)    num_lines = s.count(‘\n‘)    d = make_freq_dict(s)    num_different_words = sum(d[w]/d[w] for w in d)    num_words = sum(d[w] for w in d)    words_average_length = sum(len(w) for w in d)/num_different_words    num_once = sum(d[w] for w in d if d[w] == 1)    lst = [(d[w],w) for w in d]    lst.sort()    lst.reverse()    print("The file %s has:" % fname)    print("  %s characters" % num_chars)    print("  %s lines" % num_lines)    print("  %s words" % num_words)    print("  %s words appreance one time" % num_once)    print("  %s different words" % int(num_different_words))    print("  %s average length" % words_average_length)    print("\nThe top 10 most frequent words are:")    i = 1    for count,word in lst[:10]:        print(‘%2s. %4s %s‘ % (i, count, word))        i += 1def main():    file_stats2(‘a.txt‘)if __name__==‘__main__‘:    main()

>>> ================================ RESTART ================================>>> The file a.txt has:  12927 characters  297 lines  1645 words  515 words appreance one time  699 different words  6.539341917024321 average lengthThe top 10 most frequent words are: 1.   62 to 2.   62 the 3.   47 is 4.   42 a 5.   41 of 6.   40 it 7.   36 that 8.   35 and 9.   32 as10.   24 so