import re
# print(re.findall('\w','ab 12\+- *&_')) ['a', 'b', '1', '2', '_']
# \w
# print(re.findall('\W','ab 12\+- *&_')) [' ', '\\', '+', '-', ' ', '*', '&']
# print(re.findall('\s','ab \r1\n2\t\+- *&_')) [' ', '\r', '\n', '\t', ' ']
# print(re.findall('\S','ab \r1\n2\t\+- *&_')) ['a', 'b', '1', '2', '\\', '+', '-', '*', '&', '_']
# print(re.findall('\d','ab \r1\n2\t\+- *&_')) ['1', '2']
# \d
# print(re.findall('\D','ab \r1\n2\t\+- *&_')) ['a', 'b', ' ', '\r', '\n', '\t', '\\', '+', '-', ' ', '*', '&', '_']
# print(re.findall('\w_sb','egon alex_sb123123wxx_sb,lxx_sb')) ['x_sb', 'x_sb', 'x_sb']
# \w_sb
# print(re.findall('\Aalex','abcalex is salexb')) []
# print(re.findall('\Aalex','alex is salexb')) ['alex']
# print(re.findall('^alex','alex is salexb')) ['alex']
# print(re.findall('sb\Z','alexsb is sbalexbsb')) ['sb']
# print(re.findall('sb$','alexsb is sbalexbsb')) # ['sb']
# sb
# print(re.findall('^ebn$','ebn1')) # []
# ebn
# print(re.findall('a\nc','a\nc a\tc a1c')) ['a\nc']
# 重复匹配：
#. ? * + {m,n} .* .*?
#1、.:代表除了换行符外的任意一个字符
# print(re.findall('a.c','abc a1c aAc aaaaaca\nc'))
# a.c
# print(re.findall('a.c','abc a1c aAc aaaaaca\nc',re.DOTALL))
#2、？：代表左边那一个字符重复0次或1次
# print(re.findall('ab?','a ab abb abbb abbbb abbbb'))
# ab?
#3、*：代表左边那一个字符出现0次或无穷次
# print(re.findall('ab*','a ab abb abbb abbbb abbbb a1bbbbbbb'))
# ab*
#4、+ ：代表左边那一个字符出现1次或无穷次
# print(re.findall('ab+','a ab abb abbb abbbb abbbb a1bbbbbbb'))
# ab+
#5、{m,n}:代表左边那一个字符出现m次到n次
# print(re.findall('ab?','a ab abb abbb abbbb abbbb'))
# print(re.findall('ab{0,1}','a ab abb abbb abbbb abbbb'))
# print(re.findall('ab*','a ab abb abbb abbbb abbbb a1bbbbbbb'))
# print(re.findall('ab{0,}','a ab abb abbb abbbb abbbb a1bbbbbbb'))
# print(re.findall('ab+','a ab abb abbb abbbb abbbb a1bbbbbbb'))
# print(re.findall('ab{1,}','a ab abb abbb abbbb abbbb a1bbbbbbb'))
# print(re.findall('ab{1,3}','a ab abb abbb abbbb abbbb a1bbbbbbb'))
#6、.*：匹配任意长度，任意的字符=====》贪婪匹配
# print(re.findall('a.*c','ac a123c aaaac a *123)()c asdfasfdsadf'))
# a.*c
#7、.*？：非贪婪匹配
# print(re.findall('a.*?c','a123c456c'))
# ['a123c']
# ():分组
# print(re.findall('(alex)_sb','alex_sb asdfsafdafdaalex_sb'))
# ['alex', 'alex']
# (alex)_sb
# print(re.findall(
# 'href="(.*?)"',
# '<li><a id="blog_nav_sitehome" class="menu" href="http://www.cnblogs.com/">博客园</a></li>'))
# ['http://www.cnblogs.com/']
# <li><a id="blog_nav_sitehome" class="menu" href="http://www.cnblogs.com/">博客园</a></li>
# href=".*?"
# []:匹配一个指定范围内的字符（这一个字符来自于括号内定义的）
# print(re.findall('a[0-9][0-9]c','a1c a+c a2c a9c a11c a-c acc aAc'))
# ['a11c']
#当-需要被当中普通符号匹配时，只能放到[]的最左边或最 右边
# print(re.findall('a[-+*]c','a1c a+c a2c a9c a*c a11c a-c acc aAc'))
# print(re.findall('a[a-zA-Z]c','a1c a+c a2c a9c a*c a11c a-c acc aAc'))
# []内的^代表取反的意思
# print(re.findall('a[^a-zA-Z]c','a c a1c a+c a2c a9c a*c a11c a-c acc aAc'))
# print(re.findall('a[^0-9]c','a c a1c a+c a2c a9c a*c a11c a-c acc aAc'))
# print(re.findall('([a-z]+)_sb','egon alex_sb123123wxxxxxxxxxxxxx_sb,lxx_sb'))
# [a-z]+_sb
# | :或者
# print(re.findall('compan(ies|y)','Too many companies have gone bankrupt, and the next one is my company'))
# (?:):代表取匹配成功的所有内容，而不仅仅只是括号内的内容
# print(re.findall('compan(?:ies|y)','Too many companies have gone bankrupt, and the next one is my company'))
# print(re.findall('alex|sb','alex sb sadfsadfasdfegon alex sb egon'))
# ['alex', 'sb', 'alex', 'sb']
# re模块的其他方法：
# print(re.findall('alex|sb','123123 alex sb sadfsadfasdfegon alex sb egon'))
# print(re.search('alex|sb','123213 alex sb sadfsadfasdfegon alex sb egon').group())
# print(re.search('^alex','123213 alex sb sadfsadfasdfegon alex sb egon'))
# print(re.search('^alex','alex sb sadfsadfasdfegon alex sb egon').group())
# print(re.match('alex','alex sb sadfsadfasdfegon alex sb egon').group())
# print(re.match('alex','123213 alex sb sadfsadfasdfegon alex sb egon'))
# info='a:b:c:d'
# print(info.split(':'))
# print(re.split(':',info))
# info=r'get :a.txt\3333/rwx'
# print(re.split('[ :\\\/]',info))
# print('egon is beutifull egon'.replace('egon','EGON',1))
# print(re.sub('(.*?)(egon)(.*?)(egon)(.*?)',r'\1\2\3EGON\5','123 egon is beutifull egon 123'))
# (123 )(egon)( is beutifull )(egon)( 123)
#\1\2\3EGON\5
# print(re.sub('(lqz)(.*?)(SB)',r'\3\2\1',r'lqz is SB'))
# print(re.sub('([a-zA-Z]+)([^a-zA-Z]+)([a-zA-Z]+)([^a-zA-Z]+)([a-zA-Z]+)',r'\5\2\3\4\1',r'lqzzzz123+ is SB'))
#(lqzzzz)(123+ )(is)( )(SB)
#
# pattern=re.compile('alex')
# print(pattern.findall('alex is alex alex'))
# print(pattern.findall('alexasdfsadfsadfasdfasdfasfd is alex alex'))
