machinelearning_notebook/homework_01_python/01_01.py

#1.1 字符串：给定一个文章，找出每个单词的出现次数。例如给定下面的一篇短文，进行操作。

str = "One is always on a strange road, watching strange scenery and listening to strange music. \
      Then one day, you will find that the things you try hard to forget are already gone. "
n = len(str)
#跳过列表
skip_list = [' ','.','\n','\t']
#记录单词和出现次数
word_dict = dict()
i = 0
while i < n-1:
    if str[i] in skip_list:
        i += 1
    #读取一个单词
    word = ''
    while str[i] not in skip_list:
        word = word + str[i]
        i += 1
    #更新单词列表
    if word in word_dict:
        word_dict[word] += 1
    else:
        word_dict[word] = 1
#删除空元素
del word_dict['']

print(word_dict)