计算词频并由此制作字典

如果您不想使用collections.Counter，则可以编写自己的函数：

import sysfilename = sys.argv[1]fp = open(filename)data = fp.read()words = data.split()fp.close()unwanted_chars = ".,-_ (and so on)"wordfreq = {}for raw_word in words:    word = raw_word.strip(unwanted_chars)    if word not in wordfreq:        wordfreq[word] = 0     wordfreq[word] += 1

对于更好的东西，请看正则表达式。