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第一题
import random
brandlist = ['华为','中兴','小米','魅族','三星']
random.seed(0)
i = random.randint(1,len(brandlist))
name = brandlist[i]
print(name)
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第二题image.png
import jieba
s = input('请输入待测字符串：')
n = len(s)
m = len(jieba.lcut(s))
print('中文字符个数{}，中文词语个数{}'.format(n,m))
********************************************************************************
D:\anaconda\python.exe D:/bilibili大学/简书代码/推导式.py
请输入待测字符串：俄罗斯举办世界杯
Building prefix dict from the default dictionary ...
Loading model from cache C:\Users\董贺贺\AppData\Local\Temp\jieba.cache
Loading model cost 0.633 seconds.
中文字符个数8，中文词语个数3
Prefix dict has been built succesfully.
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第三题
n = eval(input('请输入数量：'))
if n>0:
if n==1:
cost = 160
elif n<5 and n>1:
cost = 160*n*0.9
elif n>4 and n<10:
cost = 160*n*0.8
elif n>9:
cost = 160*n*0.7
print('总额为：',cost)
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第四题
import turtle
turtle.pensize(2)
d = -45
for i in range(4):
turtle.seth(d)
d += 90
turtle.fd(200)
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第五题
names = input()
t = names.split()
d = {}
for i in range(len(t)):
d[t[i]]=d.get(t[i],0)+1
ls = list(d.items())
ls.sort(key = lambda x:x[1],reverse=True)
for k in ls:
print('{}:{}'.format(k[0],k[1]))
*******************************************************************
计算机 男优 KTV 鸭子 销售 男优 妓院 男优 计算机 男优
男优:4
计算机:2
妓院:1
鸭子:1
KTV:1
销售:1
说到这，不得不喷一下这个叫梁永的老师，您是真菜，肯定是冒充西交的研究生，西交的水平能LOW到这样了吗，真特么丢人，不会做不做就是了，还尼玛改题目，你咋不给自己出一道200分的附加题。干脆自己给自己改试卷得了。
重点说一下这个split()和replace（）函数都会产生副本，不影响原文件
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第六题
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第一问
方法一：
with open(r'D:\KSWJJ\66000001\sensor.txt')as f:
lines = f.readlines()
for line in lines:
ls = line.strip(' \n\r').split(',')
if ls[1]==' earpa001':
with open(r'D:\KSWJJ\66000001\earpa001.txt','a')as fo:
fo.write('{},{},{},{}\n'.format(ls[0],ls[1],ls[2],ls[3]))
**********************************************************************
2016/5/31 0:20, earpa001,1,1
2016/5/31 2:26, earpa001,1,6
2016/5/31 3:12, earpa001,1,1
2016/5/31 5:57, earpa001,1,6
2016/5/31 6:59, earpa001,1,1
方法二：
with open(r'D:\KSWJJ\66000001\sensor.txt')as f:
for line in f:
ls = line.strip(' \n\r').split(',')
if ls[1].count(' earpa001') == 1:
with open(r'D:\KSWJJ\66000001\earpa001.txt','a')as fo:
fo.write('{},{},{},{}\n'.format(ls[0],ls[1],ls[2],ls[3]))
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第二问
d = {}
with open(r'D:\KSWJJ\66000001\earpa001.txt')as f:
for line in f:
t = line.strip(' \n\r').split(',')
s = t[2]+'-'+t[3]
d[s]=d.get(s,0)+1
ls = list(d.items())
ls.sort(key=lambda x:x[1], reverse=True) # 该语句用于排序
for i in range(len(ls)):
m,n = ls[i]
fo = open(r'D:\KSWJJ\66000001\earpa001_count.txt','a')
fo.write('{},{}\n'.format(m,n))
fo.close()
