Python：读出文本本件，统计单词数输出；读出文本文件，随机输出其中的10个单词

#读出文本本件，统计单词数输出；读出文本文件，随机输出其中的10个单词
import re
import random
f=open("this.txt","r")
r = re.compile(r"[,!\*\.]")
#统计每个单词数
words = {}
f=open("this.txt","r")
for line in f:
    for word in r.sub("",line.strip()).split(" "):
        if word in words:
            words[word] += 1
        words.setdefault(word,1)
print(words)
#随机输出10个单词
f=open("this.txt","r")
a=[]
for line in f:
    for word in r.sub("",line.strip()).split(" "):
        a.append(word)
l=[]
for i in range(10):
    x=random.randint(0,len(a)-1)
    if x not in l:
        l.append(x)
for i in range(10):
    print(a[l[i]])
f.close()

"this.txt"

The Zen of Python, by Tim Peters
Beautiful is better than ugly.
Explicit is better than implicit.
Simple is