python新增练习（二）_打开文件

n = eval(input("请输入正整数:"))
print("{:*>15}".format(n))

python新增练习（二）_词频统计_02
python新增练习（二）_词频统计_03

a = [3,6,9]
b =  eval(input()) #例如：[1,2,3]
c = []
for i in range(3):
    c.append(a[i]+b[i])
print(c)

python新增练习（二）_C_04

import random
random.seed(0)
s = 0
for i in range(5):
    n = random.randint(1,97)  # 产生随机数
    s =s+n**2
print(s)

python新增练习（二）_词频统计_05

python新增练习（二）_C_06

import turtle
turtle.pensize(2)
d = 0
for i in range(1,9):
    turtle.fd(100)
    d += 45
    turtle.seth(d)

python新增练习（二）_打开文件_07
python新增练习（二）_打开文件_08

f=open("name.txt")
names=f.readlines()
f.close()
f=open("vote.txt")
votes=f.readlines()
f.close()
f=open("vote1.txt","w")
D={}
NUM=0
for vote in votes:
    num = len(vote.split())
    if num==1 and vote in names:
        D[vote[:-1]]=D.get(vote[:-1],0)+1
        NUM+=1
    else:
        f.write(vote)
f.close()        
l=list(D.items())
l.sort(key=lambda s:s[1],reverse=True)
name=l[0][0]
score=l[0][1]
print("有效票数为：{} 当选村长村民为:{},票数为：{}".format(NUM,name,score))

python新增练习（二）_C_09

python新增练习（二）_打开文件_10

import jieba
f = open('data.txt','r')   
lines = f.readlines()
f.close()
f = open('out.txt','w')    
for line in lines:     
    line=line.strip()              #删除每行首尾可能出现的空格
    wordList = jieba.lcut(line)         #用结巴分词，对每行内容进行分词
    f.writelines('\n'.join(wordList))  #将分词结果存到文件out.txt中
f.close()

python新增练习（二）_词频统计_11
python新增练习（二）_C_12

import jieba
f = open('out.txt','r')    #以读的方式打开文件
words = f.readlines()
f.close()
D={}
for w in words:        #词频统计
    D[w[:-1]]=D.get(w[:-1],0) + 1
print("曹操出现次数为:{}  ".format(D["曹操"]))

python新增练习（二）_词频统计_13