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

Language

Generated Code

import re regex = re.compile(r"(\{color[^}]*\})|(\![^!]*(thumbnail)\!)|(^\|[\ \h]*)|(\|[\ ]*(?=[\n\r]))", flags=re.MULTILINE) test_str = ("\"#### ![](https://secure.spiria.com/jira-staging/secure/viewavatar?size=xsmall&avatarId=12555&avatarType=issuetype) [MAINT-170     Setup a virtual IOS Development Environment](https://secure.spiria.com/jira-staging/browse/MAINT-170)####\n" " **Description** \n" "| |\n" "| |\n" "| |\n" "|!https://www.pagerduty.com/wp-content/uploads/2016/05/pagerduty-logo-green.png!|[{color:#999999}shutterstock.pagerduty.com{color}|https://shutterstock.pagerduty.com/incidents]|\n" "| |\n" "| |\n" "|Hello Don Ramsey, you have one open incident assigned to you:|\n" " \n" "|{color:#767676}Incident #149053{color}|\n" "| |\n" "|[CRITICAL: 'check_renewal_tracking' on 'prod-worker16.ma01.bigstockcorp.net'|https://shutterstock.pagerduty.com/incidents/P4HX6H1]|\n" "| |\n" "|[{color:#333333}View Incident{color}|https://shutterstock.pagerduty.com/incidents/P4HX6H1]|\n" "| |\n" "|{color:#767676}Details{color}|\n" "|pd_nagios_object: service CONTACTPAGER: 5bb546134cb64acb845ebdf05fc3ae6b|\n" "| |\n" "|{color:#767676}Status{color}|\n" "|{color:#fc0f03}Triggered{color}|\n" "| |\n" "|{color:#767676}Urgency{color}|\n" "|↑ High|\n" "| |\n" "|{color:#767676}Assigned To{color}|\n" "|[{color:#005c9c}Don Ramsey{color}|https://shutterstock.pagerduty.com/users/PAHPTR7]|\n" "| |\n" "|{color:#767676}Opened On{color}|\n" "|[{color:#000000}Oct 24, 2017 at 11:03 AM (Eastern Time (US & Canada)) {color}\\|]|\n" "| |\n" "|{color:#767676}Service{color}|\n" "|[{color:#005c9c}nagios (Bigstock){color}|https://shutterstock.pagerduty.com/services/PVF3TQU]|\n" "| |\n" "|{color:#767676}Escalation Policy{color}|\n" "|[{color:#005c9c}Bigstock Team Escalation{color}|https://shutterstock.pagerduty.com/escalation_policies#PYK0IBT]|\n" "| |\n" "| |\n" "|You can disable these messages (or turn off HTML emails) by adjusting [{color:#005c9c}your notification rules{color}|https://shutterstock.pagerduty.com/users/PAHPTR7].|\n" "| | |\n" "| |\n" "|{color:#767676}PagerDuty, Inc., 600 Townsend St., #200, San Francisco, California, 94103 Copyright © 2008 — 2017 PagerDuty, Inc. All rights reserved.{color}|\n" "| |\n\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