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

/
/

Test String

Code Generator

Generated Code

# coding=utf8 # the above tag defines encoding for this document and is for Python 2.x compatibility import re regex = r"(<b>Name)(.*?<b>)" test_str = "<html> <head> <meta http-equiv=\"Content-Language\" content=\"en-us\"> <meta http-equiv=\"Content-Type\" content=\"text/html; charset=windows-1252\"> <meta name=\"GENERATOR\" content=\"Microsoft FrontPage 4.0\"> <meta name=\"ProgId\" content=\"FrontPage.Editor.Document\"> <title>Member Card The Institute of Chartered Accountants of India</title> <script language=\"javascript\" type=\"text/javascript\"> <!-- var win=null; function NewWindow(mypage,myname,w,h,scroll,pos){ if(pos==\"random\"){LeftPosition=(screen.width)?Math.floor(Math.random()*(screen.width-w)):100;TopPosition=(screen.height)?Math.floor(Math.random()*((screen.height-h)-75)):100;} if(pos==\"center\"){LeftPosition=(screen.width)?(screen.width-w)/2:100;TopPosition=(screen.height)?(screen.height-h)/2:100;} else if((pos!=\"center\" && pos!=\"random\") || pos==null){LeftPosition=0;TopPosition=20} settings='width='+w+',height='+h+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',location=no,directories=no,status=no,menubar=no,toolbar=no,resizable=no'; win=window.open(mypage,myname,settings);} // --> </script> <SCRIPT LANGUAGE=\"JavaScript1.1\"> <!-- Original: Vivek Gupta --> <!-- Begin function right(e) { if (navigator.appName == 'Netscape' && (e.which == 3 || e.which == 2)) return false; else if (navigator.appName == 'Microsoft Internet Explorer' && (event.button == 2 || event.button == 3)) { alert(\"Sorry, you do not have permission to right click.\"); return false; } return true; } document.onmousedown=right; document.onmouseup=right; if (document.layers) window.captureEvents(Event.MOUSEDOWN); if (document.layers) window.captureEvents(Event.MOUSEUP); window.onmousedown=right; window.onmouseup=right; // End --> </script> </head> <body bgcolor=\"#ECFFFF\"> <p align=\"center\"><u><i><b><font size=\"5\">Members Details as on Date</font></b></i></u></p> <hr> <div align=\"right\"> <table border=\"0\" width=\"100%\"> <tr> <td width=\"13%\" bgcolor=\"#CCCCFF\"><font size=\"2\"><b>Membership No.</b></font></td> <td width=\"2%\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>:</b></font></td> <td width=\"25%\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>140337,&nbsp;&nbsp;&nbsp; </b></font><b><font color=\"#FF0000\" size=\"3\">ACTIVE</font> </b></td> <td width=\"8%\" bgcolor=\"#CCCCFF\"><font size=\"2\"><b>Sex</b></font></td> <td width=\"1%\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>:</b></font></td> <td width=\"18%\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>M </b></font></td> <td width=\"13%\" bgcolor=\"#CCCCFF\"><font size=\"2\"><b>Date of Birth</b></font></td> <td width=\"1%\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>:</b></font></td> <td width=\"38%\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>30/12/1986 </b></font></td> </tr> <tr> <td width=\"13%\" bgcolor=\"#CCCCFF\"><font size=\"2\"><b>Name</b></font></td> <td width=\"2%\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>:</b></font></td> <td width=\"25%\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>CA. THAKRAR UTSAV SUBHASH </b></font></td> <td width=\"8%\" bgcolor=\"#CCCCFF\"><font size=\"2\"><b>Blood Grp</b></font></td> <td width=\"1%\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>:</b></font></td> <td width=\"18%\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>B (-) </b></font></td> <td width=\"13%\" bgcolor=\"#CCCCFF\"><font size=\"2\"><b>Enrolment Dt.</b></font></td> <td width=\"1%\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>:</b></font></td> <td width=\"38%\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>29/07/2011 </b></font></td> </tr> <tr> <td width=\"13%\" bgcolor=\"#CCCCFF\"><font size=\"2\"><b>Asso.&nbsp; / Fellow</b></font></td> <td width=\"2%\" bgcolor=\"#99CCFF\">:</td> <td width=\"25%\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>ACA </b></font></td> <td width=\"8%\" bgcolor=\"#CCCCFF\"><font size=\"2\"><b>Nationality</b></font></td> <td width=\"1%\" bgcolor=\"#99CCFF\"></td> <td width=\"18%\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>IND </b></font></td> <td width=\"13%\" bgcolor=\"#CCCCFF\"><font size=\"2\"><b>Fellow Date</b></font></td> <td width=\"1%\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>:</b></font></td> <td width=\"38%\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>&nbsp; </b></font></td> </tr> <tr> <td width=\"13%\" bgcolor=\"#CCCCFF\"><font size=\"2\"><b>Father's Name</b></font></td> <td width=\"2%\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>:</b></font></td> <td width=\"25%\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>SUBHASH THAKRAR </b></font></td> <td width=\"8%\" bgcolor=\"#CCCCFF\"></td> <td width=\"1%\" bgcolor=\"#99CCFF\"></td> <td width=\"18%\" bgcolor=\"#99CCFF\"></td> <td width=\"13%\" bgcolor=\"#CCCCFF\"><b><font size=\"2\">COP Status</font></b></td> <td width=\"1%\" bgcolor=\"#99CCFF\"><b>:</b></td> <td width=\"27%\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>FULLTIME </b></font></td> </tr> </table> </div> <hr> <div align=\"right\"> <table border=\"0\" width=\"100%\"> <tr> <td width=\"50%\" colspan=\"2\" bgcolor=\"#CCCCFF\"><u><font size=\"2\"><b>Professional Address Details</b></font></u></td> <td width=\"50%\" colspan=\"2\" bgcolor=\"#CCCCFF\"><u><font size=\"2\"><b>Residential Address Details</b></font></u></td> </tr> <tr> <td width=\"50%\" colspan=\"2\"></td> <td width=\"50%\" colspan=\"2\"></td> </tr> <tr> <td width=\"50%\" colspan=\"2\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>OPP PUNJAB NATIONAL BANK </b></font></td> <td width=\"50%\" colspan=\"2\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>M/S CHATRABHUJ SAVJI &amp; CO </b></font></td> </tr> <tr> <td width=\"50%\" colspan=\"2\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>SUTARWADA </b></font></td> <td width=\"50%\" colspan=\"2\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>SUTARWADA </b></font></td> </tr> <tr> <td width=\"50%\" colspan=\"2\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>&nbsp; </b></font></td> <td width=\"50%\" colspan=\"2\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>&nbsp; </b></font></td> </tr> <tr> <td width=\"50%\" colspan=\"2\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>&nbsp; </b></font></td> <td width=\"50%\" colspan=\"2\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>&nbsp; </b></font></td> </tr> <tr> <td width=\"50%\" colspan=\"2\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>PORBANDAR - 360575 </b></font></td> <td width=\"50%\" colspan=\"2\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>PORBANDAR - 360575 </b></font></td> </tr> <tr> <td width=\"50%\" colspan=\"2\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>INDIA </b></font></td> <td width=\"50%\" colspan=\"2\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>INDIA </b></font></td> </tr> <tr> <td width=\"14%\" bgcolor=\"#CCCCFF\"><font size=\"2\"><b>Tel. No.</b></font></td> <td width=\"36%\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>0286-2243863 </b></font></td> <td width=\"14%\" bgcolor=\"#CCCCFF\"><font size=\"2\"><b>Tel. No.</b></font></td> <td width=\"34%\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>0286 2245641 </b></font></td> </tr> <tr> <td width=\"14%\" bgcolor=\"#CCCCFF\"><font size=\"2\"><b>Fax. No.</b></font></td> <td width=\"36%\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>&nbsp; </b></font></td> <td width=\"14%\" bgcolor=\"#CCCCFF\"><font size=\"2\"><b>Fax. No.</b></font></td> <td width=\"34%\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>&nbsp; </b></font></td> </tr> <tr> <td width=\"14%\" bgcolor=\"#CCCCFF\"><font size=\"2\"><b>Mob. No.</b></font></td> <td width=\"36%\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>09409059418 </b></font></td> <td width=\"14%\" bgcolor=\"#CCCCFF\"><font size=\"2\"><b>Mob. No.</b></font></td> <td width=\"34%\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>09409059418 </b></font></td> </tr> <tr> <td width=\"14%\" bgcolor=\"#CCCCFF\"><font size=\"2\"><b>E-mail.</b></font></td> <td width=\"36%\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>usthakrar@gmail.com </b></font></td> <td width=\"14%\" bgcolor=\"#CCCCFF\"><font size=\"2\"><b>E-mail.</b></font></td> <td width=\"34%\" bgcolor=\"#99CCFF\"><font size=\"2\"><b>usthakrar@gmail.com </b></font></td> </tr> </table> </div> <hr> <div align=\"right\"> <table border=\"0\" width=\"100%\"> <tr> <td width=\"29%\"> <a href=\"locm_res.asp?MRH_MRN=140337\" onclick=\"NewWindow(this.href,'mywin','500','400','no','center');return false\" onfocus=\"this.blur()\"><b><font color=\"#0000FF\">Member Employment Details</font></b></a></td> <td width=\"27%\"> <a href=\"locm_ocp.asp?MRH_MRN=140337\" onclick=\"NewWindow(this.href,'mywin','900','400','no','center');return false\" onfocus=\"this.blur()\"> <b><font color=\"#0000FF\">Member Firm Association Details</font></b></a></td> <td width=\"44%\"><b><a href=\"locm_article.asp?MRH_MRN=140337\" onclick=\"NewWindow(this.href,'mywin','900','400','yes','center');return false\" onfocus=\"this.blur()\"> <font color=\"#0000FF\"> Article / Audit (List of Student undergoing Training with details)</font></a></b></td> </tr> <tr> <td width=\"29%\"> . </td> <td width=\"27%\"> </td> <td width=\"44%\">.</td> </tr> <tr> <td width=\"100%\" colspan=\"3\" align=\"center\"> <b><font color=\"#0000FF\"><a href=\"firm_approval.asp\" onclick=\"NewWindow(this.href,'mywin','900','400','yes','center');return false\" onfocus=\"this.blur()\"> Search Firm Registered / Approved with ICAI as on Date</a></font></b></td> </tr> </table> </div> <p> &nbsp;</p> <hr> <p>&nbsp;</p> </body> </html> " matches = re.search(regex, test_str) if matches: print ("Match was found at {start}-{end}: {match}".format(start = matches.start(), end = matches.end(), match = matches.group())) for groupNum in range(0, len(matches.groups())): groupNum = groupNum + 1 print ("Group {groupNum} found at {start}-{end}: {group}".format(groupNum = groupNum, start = matches.start(groupNum), end = matches.end(groupNum), group = matches.group(groupNum))) # Note: for Python 2.7 compatibility, use ur"" to prefix the regex and u"" to prefix the test string and substitution.

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