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  • Python模块学习------ 正则表达式

    import re 
    #f = open('data.txt','r')
    #for eachline in f.readlines():
        #print re.split('ss+', eachline)
    
    ## !/usr/bin/env python
    
    from random import randint, choice
    from string import lowercase
    from sys import maxint
    from time import ctime
    
    doms = ('com', 'edu', 'net', 'org', 'gov')
    
    for i in range(randint(5, 10)):  
        dtint = randint(0, maxint -1)   
        dtstr = ctime(dtint)
       
        shorter = randint (4,7)
        em = ''
        for j in range(shorter):
            em += choice(lowercase)
                   
        longer = randint (shorter, 12)
        dn = ''
        for j in range(longer):
            dn += choice(lowercase)
            
        print "%s::%s@%s.%s::%d-%d-%d" % (dtstr, em, dn, choice(doms), dtint, shorter, longer)
    

     运行结果:

    Sat Mar 13 01:58:52 2032::cdrnpl@spvxjivzlzux.net::1962727132-6-12
    Wed May 17 00:02:49 2034::cvyyd@nrfry.net::2031408169-5-5
    Mon Oct 04 00:23:55 2004::zvkxrhv@fwbdncrl.org::1096820635-7-8
    Sat Feb 16 01:46:48 2013::lgkzuz@fvratahza.edu::1360950408-6-9
    Fri Aug 13 02:20:00 1976::dvsptdy@szsfeub.edu::208722000-7-7
    Sun Dec 01 04:54:59 1991::oqdoh@dcuqagr.gov::691534499-5-7
    Thu Oct 11 01:32:08 1990::qaoevt@kvbjqd.edu::655579928-6-6
    Tue Aug 04 04:33:58 2009::jnejg@jmzwb.gov::1249331638-5-5
    Sun Jul 20 08:11:48 2003::nuohl@svtgnn.net::1058659908-5-6
    Tue May 29 12:09:07 2001::pgfzf@segsnmusti.net::991109347-5-10
    
    import re
    data = 'Mon May 18 01:40:03 2020::mkxvej@pbhhwbxzgk.edu::1589737203-6-10'
    patt1 = '^(Mon|Tue|Wed|Thu|Fri|Sat|Sun)'
    s_patt = '-(d)-'
    s_search = re.search(s_patt, data)
    print s_search.group()
    m_patt_0 = '.+(d+-d+-d+)'
    m_match_0 = re.match(m_patt_0, data)
    print m_match_0.group(1)
    m_patt = '.+?(d+-d+-d+)'
    m_match = re.match(m_patt, data)
    print m_match.group(1)
    

     “非贪婪”操作符“?”, 可以用在“*”、“+”、“?”的后面。可以使正则表达式引擎匹配的字符越少越好。

    运行结果:

    -6-
    3-6-10
    1589737203-6-10
    
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  • 原文地址:https://www.cnblogs.com/xiyuan2016/p/7123160.html
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