Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
Processing...

Test String

Code Generator

Generated Code

import re regex = re.compile(r""" ([a-z]\s*)? ( ( [零幺一二两三四五六七八九十百千万点比] |[零一二三四五六七八九十][ ] |(?<=[一二两三四五六七八九十])[年月日号] |(分之) )+ ( (?<=[一二两三四五六七八九十])[a-zA-Z年月日号个只分万亿秒] |(?<=[一二两三四五六七八九十]\s)[a-zA-Z] )? (?(1) |(?(5) |( [零幺一二两三四五六七八九十百千万亿点比] |(分之) ) )+ ) ) """, flags=re.VERBOSE | re.IGNORECASE) test_str = ("压缩软件七 zip \n" "这是一部 iPhone 四 s \n" "这是一部苹果四 s\n" "我要玩 gta五\n" "索尼相机 mark 五\n" "三星 s 七\n" "数字测试一万三千七百零二\n" "不管三七二十一\n" "九九八十一难\n" "时间测试二零一八年五月二十三号上午十点十分\n" "一万零七十六\n" "百分之三十二点六八\n" "比分测试十七比十六\n" "比分测试三十七比十六\n" "一点一\n" "一点一滴\n" "八九十\n" "一个人一定要\n" "一五八七三六九零\n" "二七九三零一二二\n" "八五三零七四九九\n" "二六一四九七八七\n" "一五九六四八六二\n" "四五六九八七二三\n" "四八六一五九六四\n" "一七八六四五八九\n" "一二三加四五六\n" "九七八六加三三八四\n" "发电站每天发电三万零二十九度电\n" "银行月交易总额七千九百零三亿元\n" "深圳每月平均工资在一万三千元\n" "每月房租要交一千伍佰元\n" "我每月交通费用在四百元左右\n" "本月开销费用是五万一千三百二十八元\n" "如果你中了五千万元奖金会分我一半吗\n" "这个月工资我发了三千五百二十九元\n" "学会了这个技能你至少可以涨薪五千元\n" "我们的会议时间定在九点二十五分开始\n" "上课时间是八点十五分请不要迟到\n" "昨天你九点二十一分才到教室\n" "今天是二零一九年一月三十一号\n" "今年的除夕夜是二零一九年二月四号\n" "这根水管的长度不超过三十五米\n" "四百米是最短的长跑距离\n" "最高的撑杆跳为十一米\n" "等会请在十二点零五分请通知我\n" "二十三点十五分开始\n" "你生日那天我会送你九百九十九朵玫瑰\n" "给我一双鞋我可以跳九十六米远\n" "虽然我们的身高相差三百五十六毫米也不影响我们交往\n" "我们班的最高总分为五百八十三分\n" "今天考试老师多扣了我二十一分\n" "我量过这张桌子总长为一点三七米\n" "乘务员身高必须超过一百八十五公分\n" "这台电脑分辨率为一零二四\n" "手机价格不超过一千五百元\n" "一百零一点二三\n" "一百二十三点一一六\n" "四百五十六点一四七\n" "零点一五九四\n" "三点一四一五\n" "零点一一二二三三\n" "零点一\n" "四万零一点九八七\n" "五十六点八七八\n" "零点零零一二三\n" "零点零零零一\n" "零点九二零一五\n" "九百九十九点零零零一\n" "一万点一二三\n" "六百六十六点五五五\n" "四百四十四点七八九\n" "七百八十九点六六六\n" "零点一二三四五\n" "一点零五六四九\n" "环比上调百分之一点八六\n" "环比分别下跌百分之三点四六及微涨百分之零点七零\n" "单价在三万元的二手房购房个案当中\n" "六月仍有百分之七单价在三万元的房源\n" "最终也只是以总积分一分之差屈居第二\n" "中新网八月二十九日电今日\n" "自六月底呼和浩特市率先宣布取消限购后\n" "仅一个多月的时间里\n" "除了北京上海广州深圳四个一线城市和三亚之外\n" "四十六个限购城市当中\n" "四十一个已正式取消或变相放松了限购\n" "其中包括对拥有一套住房并已结清相应购房贷款的家庭\n" "这个后来被称为九三零新政策的措施\n" "今年有望超三百亿美元\n" "就连一向看多的任志强\n" "近期也一反常态地发表看空言论\n" "这块黄金重达三百二十四点七五克\n" "她出生于八六年八月十八日她弟弟出生于一九九五年三月一日\n" "电影中梁朝伟扮演的陈永仁的编号二七一四九\n" "现场有十二分之七的观众投出了赞成票\n" "随便来几个价格十二块五和三十四点五元和二十点一万\n" "明天有百分之六十二的概率降雨\n" "这是固话零四二一三三四四一一二二\n" "这是手机八六一八五四四一三九一二一\n") matches = regex.finditer(test_str) for match_num, match in enumerate(matches, start=1): print(f"Match {match_num} was found at {match.start()}-{match.end()}: {match.group()}") for group_num, group in enumerate(match.groups(), start=1): print(f"Group {group_num} found at {match.start(group_num)}-{match.end(group_num)}: {group}")

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Python, please visit: https://docs.python.org/3/library/re.html