字符串操作练习：星座、凯撒密码、99乘法表、词频统计预处理

99乘法表

for i in range(1,10,1):
    for j in range(1,i+1,1):
        print('%d*%d=%d'%(i,j,i*j),end='\t')
    print('\n')

中国GDP

>>> print('中华人民共和国国内生产总值（GDP）{0:,.2f}亿元（2015年）'.format(689136.89))
中华人民共和国国内生产总值（GDP）689,136.89亿元（2015年）
>>> 

12星座

>>> for i in range (12):
    print(chr(9800+i))

    
♈
♉
♊
♋
♌
♍
♎
♏
♐
♑
♒
♓
>>> for i in range (12):
    print(chr(9800+i),end='\t')

    
♈    ♉    ♊    ♋    ♌    ♍    ♎    ♏    ♐    ♑    ♒    ♓    
>>> for i in range (12):
    print(chr(9800+i),end=' ')

    
♈ ♉ ♊ ♋ ♌ ♍ ♎ ♏ ♐ ♑ ♒ ♓ 
>>> 

凯撒密码（+3）

kaisa=input('明文:')
s=ord('a')
for i in kaisa:
    if s<= ord(i)<=ord('z'):
        print(chr(s+(ord(i)-s+3)%26),end='')
    else:
        print(i,end='')
        

 

 {}的格式控制<序号><填充><对齐>宽度<千分位><精度><类型>

>>> print('输出的数是:{0:,.4f}'.format(1995.112))
输出的数是:1,995.1120

>>> p='hpk'
>>> print('字符串{0:*>8}'.format(p))
字符串*****hpk

 

输入姓名，格式输出：占4位、居中、不足4字的以空格填充 

a=input('请输入姓名(四个字以内)：')
if len(a)==4:
    print('{}'.format(a))
else:
    print('{0: >4}'.format(a))
    

 

下载一首英文的歌词或文章，统计单词出现的次数，将所有,.？！替换为空格，将所有大写转换为小写

kang='''I’m at a payphone trying to call home
All of my change I’ve spent it on you
Where are the times gone baby
It’s all wrong, where are the plans we made for two
Yeah, I, I know it’s hard to remember
The people we used to be
It’s even harder to picture
That you’re not here next to me
You said it’s too late to make it
But is it too late to try?
And then that time that you wasted
All of our bridges burned down
I’ve wasted my nights
You turned out the lights
Now I’m paralyzed
Still stucked in that time when we called it love
But even the sun sets in paradise
I’m at a payphone trying to call home
All of my change i’ve spent on you
Where are the times gone baby
It’s all wrong, where are the plans we made for two
If happy ever after did exist
I would still be holding you like this
And all those fairytales are full of it
One more stupid love song I’ll be sick
You turned your back on tomorrow
Cause you forgot yesterday
I gave you my love to borrow
But just gave it away
You can’t expect me to be fine
I don’t expect you to care
I know I said it before
But all of our bridges burned down
I’ve wasted my nights
You turned out the lights
Now I’m paralyzed
Still stucked in that time when we called it love
But even the sun sets in paradise
I’m at a payphone trying to call home
All of my change I’ve spent on you
Where are the times gone baby
It’s all wrong, where are the plans we made for two
If happy ever after did exist
I would still be holding you like this
And all those fairytales are full of it
One more stupid love song I’ll be sick
Now I’m at a payphone…
Now work that sh-t
I’ll be right here spending all this money while you sitting round
Wondering why wasn’t you who came out from nothing
Made it from the bottom
Now when you see me I’m strutting
And all of my cause a way to push up a button
Telling me the chances I blew up or whatever you call it
Switched the number to my phone
So you never can call it
Don’t need my name, or my show
Swish you can tell it I’m ballin’
What a shame coulda got picked
Had a really good game but you missed your last shot
So you talk about who you see at the top
Or what you could’ve saw
But sad to say it’s over for it
Phantom roll out valet open doors
Where’s the car way, got what you was looking for
Now ask me who they want
So you can go take that little piece of sh-t with you
I’m at a payphone trying to call home
All of my change I’ve spent on you
Where are the times gone baby
It’s all wrong, where are the place we made for two
If happy ever after did exist
I would still be holding you like this
And all these fairytales are full of it
One more stupid love song I’ll be sick
Now i’m at a payphone'''
print('payphone的个数为')
print(kang.count('payphone'))
print('全文改为小写')
print(kang.lower())

用webbrowser打开校园新闻

import webbrowser as web
url='http://news.gzcc.cn/html/xiaoyuanxinwen/'
web.open_new_tab(url)
for i in range(2,5):
    web.open_new_tab('http://news.gzcc.cn/html/xiaoyuanxinwen/'+str(i)+'.html')