字符串操作练习:星座、凯撒密码、99乘法表、词频统计预处理
实例:输出12个星座符号,以反斜线分隔。
for i in range(12):
print(chr(9800+i),end="\t")
输入姓名,格式输出:占4位、居中、不足4字的以空格填充。
s = input('input your name:') s = str(s) print('{0: ^75}'.format(s))
实例:恺撒密码的编码
def Caesar_code(s,t): s = str(s) t = int(t) l = [] for i in range(len(s)): l.append(chr(ord(s[i])+t)) print(chr(ord(s[i])+t),end='') Caesar_code('huanglinsheng',3)
实例:打出99乘法表
for i in range(1,10): for j in range(1,i+1): print('{}*{}={}\t'.format(i,j,i*j),end='') print(" ")
格式化输出:中华人民共和国国内生产总值(GDP)689,136.89亿元(2015年)(千分位、2位小数,浮点数)
GDP = input('中华人民共和国国内生产总值(GDP):') GDP = str(GDP) Year = input('输入年份:') Year = int(Year) print('{} : {}'.format(Year,GDP))
实例: 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。
s = '''英文歌 (5, 4, 3, 2, 1)-群星 I plant a flower, plant a tree Plant your hopes and plant your dreams And let them grow until… (5, 4, 3, 2, 1) I’ll take you somewhere that is near Seas of blue and fields of green May the heartaches soon be healed I’m just a woman but I’m for real As strong as every man can be So put your faith in me… I'm what I am and what you see Only say the words that I would keep I'm one of you ''' print(s.count('I')) print(s.replace('I','i')) print(s.replace('I','my')) print(s.replace('a',' '))
用webbrowser,uweb.open_new_tab('url')打开校园新闻列表
import webbrowser as web for i in range(2,5): web.open_new_tab('http://news.gzcc.cn/html/meitishijie/'+str(i)+'.html')
posted on 2017-09-18 11:41 huanglinsheng 阅读(152) 评论(0) 编辑 收藏 举报