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学习18内容#re 正则模块
发布于2019-08-05 12:13 阅读(939) 评论(0) 点赞(1) 收藏(0)
re 正则
import res = "meet_宝元_meet"
print(re.findall("meet",s))
从字符串中全部查找内容,返回一个列表s = "meet_宝元_meet123"
print(re.findall("\w",s))
查找数字,字母(中文),下划线s = "meet_宝元_meet123!@#"
print(re.findall("\W",s))
查找非数字,字母(中文),下划线s = "meet_ 宝元_ me et\t \n"
print(re.findall("\s",s))
查找任意空格,换行符,制表符s = "meet_ 宝元_ me et\t \n"
print(re.findall("\S",s))
查找非任意空格,换行符,制表符s = "meet_ 宝元_123me et\t \n"
print(re.findall("\d",s))
查找数字
print(re.findall("\D",s))
查找非数字s = "meet宝元_123meet\t \n"
print(re.findall("\Ameet",s))
print(re.findall("^meet",s))
查找是否以什么开头的内容s = "meet宝元_123meet"
print(re.findall("t\Z",s))
print(re.findall("t$",s))
查找是否以什么结尾的内容s = "meet宝元_123meet \n \t \n"
print(re.findall("\n",s))
查找换行符print(re.findall("\t",s))
查找制表符s = "m\net宝元_123maet \n \t "
print(re.findall("m.e",s))
.只能匹配任意一个内容(非换行符)s = "m\net宝元_123maet \n \t "
print(re.findall("m.e",s,re.DOTALL))
.只能匹配任意一个内容s = "meet宝元_1A-23maet"
print(re.findall("[a-z]",s)) # 小写的a,z
print(re.findall("[A-Z]",s)) # 大写的A,Z
print(re.findall("[A-Za-z]",s)) # 大写和小写的a,z A,Z
print(re.findall("[a-z0-9]",s)) # 小写的a,z 数字 0,9s = "meet宝元_1A-23maet"
print(re.findall("[^0-9]",s)) # [^0-9] 查找非0-9的内容s = "mmmmmm"
print(re.findall("m*",s)) # * 匹配 0个多个 [贪婪匹配]s = "meet_asdf_msss_mmns_aaam" # + 匹配1个或多个 [贪婪匹配]
print(re.findall("me+",s)) # me,mee,meee,meeeee,s = "meet_asdf_msss_mmns_aaam" # ? 匹配 0个或1个 [非贪婪匹配]
print(re.findall("m?",s))s = "meet_asdf_msss_mmns_aaam" # s{3} s重复3次 == sss
print(re.findall("s{3}",s))s = "meet_assdf_msss_mmns_aaam"
print(re.findall("s{1,3}",s)) # s{1,3} s ss sss
指定最少多少次,最多多少次a|b # 或
s = "meet_assdf_msss_mmns_aaam"
print(re.findall("m|s",s)) # m或者ss = "meet_assdf_mssst_(.)mmns_aaamaaatmsssssssssssstt"
print(re.findall("m(.+)t",s))s = "meet_assdf_mssst_(.)mmns_aaamaaatmsssssssssssstt"
print(re.findall("m(?:..?)t",s))s = 'alex_sb ale123_sb wu12sir_sb wusir_sb ritian_sb 的 alex wusir '
print(re.findall("\w+_sb",s))
print(re.findall("[a-z]+_sb",s))s = '_sb alex 123_sb wu12sir_sb wusir_sb ritian_sb 的 x wusir '
print(re.search("ale",s).group())
search 找到1个后就停止查找了,从字符串中进行查找.找到后返回的是一个对象,查看元素.group()s = '_sb alex 123_sb wu12sir_sb wusir_sb ritian_sb 的 x wusir '
print(re.match("ale",s).group())
match 找到1个后就停止查找了,只从字符串的开头查找.找到后返回的是一个对象,查看元素.group()s = '_sb alex,123:sb;wu12sir#sb*wusir!sb ritian_sb 的 x wusir '
print(re.split("[#,:!*]",s))
分割替换
print(re.sub("barry","太亮",'barry是最好的讲师，barry就是一个普通老师，请不要将barry当男神对待。'))compile # 定义匹配规则
obj = re.compile("\w")
print(obj.findall("meet_宝元_常鑫垃圾"))
re.findall("\w","meet_宝元_常鑫大煎饼")finditer # 返回是一个迭代器的地址
g = re.finditer("\w","常鑫垃圾")
print(next(g).group())
for i in g:
print(i.group())print(re.findall("常(.*?)娃","常鑫垃圾_井盖_烧饼吃娃娃_自行车_葫芦爷爷救娃娃"))
print(re.findall("常(.*?)娃","常鑫垃圾_井盖_烧饼吃娃娃_自行车_葫芦爷爷救娃娃"))print(re.search("(?P<tag_name>\w+)\w+\w+","h1hellh1"))
print(re.search("(?P<aaa>\w+)dfa","asbsadfasdfa").group("aaa"))
print(re.search("(?P<cx>\w+)dfa","asbsadfasdfa").group())1 "1-2*(60+(-40.35/5)-(-4*3))"
1.1 匹配所有的整数s = "1-2*(60+(-40.35/5)-(-4*3))"
print(re.findall("\d+",s))匹配所有的数字（包含小数）
print(re.findall("\d+\.\d+|\d+",s))匹配所有的数字（包含小数包含负号）
print(re.findall("-?\d+\.\d+|-?\d+",s))s = "http://blog.csdn.net/make164492212/article/details/51656638"
print(re.findall("h.*2/",s))s1 = '''
时间就是1995-04-27,2005-04-27
1999-04-27 老男孩教育创始人
老男孩老师 alex 1980-04-27:1980-04-27
2018-12-08
'''
print(re.findall("\d+-\d+-\d+",s1))匹配qq号：腾讯从10000开始
qq = input("请输入QQ号:")
print(re.findall("[1-9][0-9]{4,9}",qq))s1 = '''
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</div>
'''
print(re.findall("<span(.*?)>",s1))
print(re.findall('<a href="(.*?)"',s1))所属网站分类: 技术文章 > 博客
作者：爱妃不要跑
链接：https://www.pythonheidong.com/blog/article/4533/2251492f29a8bff6b2a3/
来源：python黑洞网
任何形式的转载都请注明出处,如有侵权 一经发现 必将追究其法律责任
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