Python把一段英文中所有单词进行分隔（列表）

# 测试
# 从网络上拷贝的一段英文，实现分隔。当不是分隔符时，认为是一个单词。
# 需要定义一个变量来记录单词的开始
p = "Nowadays, Chinese, our mother tongue," \
    "is enjoying an unprecedented popularity in the world." \
    " Over two hundred Confucius Institutes have been set up in sixty-nine countries," \
    "and many foreigners are attracted by the old," \
    " mysterious and charmin... "
words = []  # 建立一个空列表
index = 0   # 遍历所有的字符
start = 0   # 记录每个单词的开始位置
while index < len(p):   # 当index小于p的长度
    start = index       # start来记录位置
    while p[index] != " " and p[index] not in[".", ","]:   # 若不是空格，点号，逗号
        index += 1   # index加一
        if index == len(p):  # 若遍历完成
            break   # 结束
    words.append(p[start:index])
    if index == len(p):
        break
    while p[index] == " " or p[index] in [".", ","]:
        index += 1
        if index ==len(p):
            break

print(words)