字符串操作练习：星座、凯撒密码、99乘法表、词频统计预处理

for i in range(12):
    print(chr(9800+i),end="/")

sr1="abcdefghijklmnopqrstuvwxyz"
sr2=sr1.upper()
sr=sr1+sr1+sr2+sr2
st=input("please input:")
sR=""
for j in st:
    if j==" ":
        sR = sR +" "
        continue
    i=sr.find(j)
    if(i>-1):
        sR=sR+sr[i-3]
print(sR)

print("圆周率{{{1:,.4f}{2}}}是{0}".format("无理数",3.1415926,"..."))

a=input("please input:")
print(a.center(4,‘ ‘))

a=float(input("please input money:"))
b=input("please input year:")
print("中华人民共和国国内生产总值(GDP){0:,.2f}亿元({1}年)".format(a,b))

for i in range(1,10):
    for j in range(1,i+1):
        print(j,"*",i,"=",i*j," ",end=‘‘)
    print(end=‘\n‘)

sr=‘‘‘Just one last dance ,oh baby just one last dance!
We meet in the night in the Spanish café,
I look in your eyes just don‘t know what to say,
It feels like I‘m drowning in salty water,A few hours left ‘til the sun‘s gonna rise,
tomorrow will come an it‘s time to realize.our love has finished forever,
how I wish to come with you!how I wish we make it through!
Just one last dance!before we say goodbye,
when we sway and turn round and round and round,
it‘s like the first time,Just one more chance,
hold me tight and keep me warm.cause the night is getting cold.
and I don‘t know where I belong,Just one last dance! ‘‘‘

print("dance出现次数:",sr.count(‘dance‘))
for i in sr:
    sr=sr.replace(‘,‘,‘ ‘)
    sr=sr.replace(‘!‘,‘ ‘)
    sr=sr.replace(‘?‘,‘ ‘)
print(sr)
for i in sr:
    sr=sr.lower()
print(sr)

import webbrowser as web
i=input("please input number:")
web.open_new_tab(‘http://news.gzcc.cn/html/xiaoyuanxinwen/‘+str(i)+‘.html‘)