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
No Match

/
/
m

Test String

Code Generator

Language

Generated Code

# coding=utf8 # the above tag defines encoding for this document and is for Python 2.x compatibility import re regex = r"^ *analyticsConfig\.analyticsClass = WLAnalyticsWrapper\.self" test_str = ("@objc (WLAppDelegate)\n" "open class WLAppDelegate: LUUIBaseAppDelegate {\n\n" " fileprivate var overrideTabBarControllerDelegate: LUUITabBarControllerDelegate?\n" " open override var tabBarControllerDelegate: UITabBarControllerDelegate? {\n" " if overrideTabBarControllerDelegate == nil {\n" " overrideTabBarControllerDelegate = WLTabBarControllerDelegate()\n" " }\n" " return overrideTabBarControllerDelegate\n" " }\n\n" " @objc open override func applyAppearance() {\n" " super.applyAppearance()\n" " WLAppearance.apply()\n" " }\n\n" " // swiftlint:disable:next function_body_length\n" " @objc open override func configureApplicationKeys() {\n" " let appConfig: LUUIApplicationConfiguration = LUUIApplicationConfiguration.shared()\n\n" " appConfig.crashlyticsAPIKey = WLCrashlyticsAPIKey\n" " appConfig.googleAnalyticsTrackingID = WLGoogleAnalyticsTrackingID\n" " appConfig.inviteFriendsShowsQRCode = true\n" " appConfig.referAFriendCampaignID = NSNumber(value: WLReferAFriendCampaignID)\n" " appConfig.usesSideNavigation = false\n" " appConfig.enablePaymentPreferenceSelection = true\n" " appConfig.sendGiftCardFromSettings = true\n" " appConfig.claimBankingEnabled = true\n" " appConfig.showEnableLocationAlert = true\n" " appConfig.enableFacebookLogin = true\n" " appConfig.myRewardsEnabled = true\n" " appConfig.showOptionalInfoDuringRegistration = true\n" " appConfig.analyticsConfiguration = analyticsConfiguration()\n" " appConfig.cardReaderConfiguration = cardReaderConfiguration()\n" " appConfig.appLocationsScreen = .mapLocations\n" " appConfig.allowsOrderAhead = true\n" " appConfig.enableOrderAheadLandingScreen = true\n" " appConfig.allowsOrderAheadDelivery = false\n" " appConfig.orderAheadMenuLayoutStyle = .list\n" " appConfig.modularRewardsEnabled = true\n" " appConfig.enableOrderAheadTipCell = false\n\n" " appConfig.levelupAPIKey = WLLevelUpAPIKey\n" " appConfig.environmentConfigProd.levelupAppID = WLLevelUpAPIKey as NSString\n" " appConfig.environmentConfigStaging.levelupAPIKey = WLLevelUpAPIKeyStaging as NSString\n\n" " appConfig.levelupAppID = WLLevelUpAppID\n" " appConfig.environmentConfigProd.levelupAppID = WLLevelUpAppID as NSString\n" " appConfig.environmentConfigStaging.levelupAppID = WLLevelUpAppIDStaging as NSString\n\n" " if WLLegacyLoyaltyCampaignID > 0 {\n" " appConfig.loyaltyMigrationCampaignID = NSNumber(value: WLLegacyLoyaltyCampaignID)\n" " appConfig.environmentConfigProd.loyaltyMigrationCampaignID = appConfig.loyaltyMigrationCampaignID!\n" " appConfig.environmentConfigStaging.loyaltyMigrationCampaignID = NSNumber(value: WLLegacyLoyaltyCampaignIDStaging)\n" " }\n\n" " if WLReferAFriendCampaignID > 0 {\n" " appConfig.referAFriendCampaignID = NSNumber(value: WLReferAFriendCampaignID)\n" " appConfig.environmentConfigProd.referAFriendCampaignID = appConfig.referAFriendCampaignID!\n" " appConfig.environmentConfigStaging.referAFriendCampaignID = NSNumber(value: WLReferAFriendCampaignIDStaging)\n" " }\n\n" " if let rewardsLoyaltyCampaignID: NSNumber = applicationConfig().rewardsLoyaltyCampaignID {\n" " appConfig.rewardsLoyaltyCampaignID = rewardsLoyaltyCampaignID\n" " appConfig.rewardsLoyaltyCampaignType = .spendBased\n" " } else if WLRewardsLoyaltyCampaignID > 0 {\n" " appConfig.rewardsLoyaltyCampaignID = NSNumber(value: WLRewardsLoyaltyCampaignID)\n" " appConfig.environmentConfigProd.rewardsLoyaltyCampaignID = appConfig.rewardsLoyaltyCampaignID!\n" " appConfig.environmentConfigStaging.rewardsLoyaltyCampaignID = NSNumber(value: WLRewardsLoyaltyCampaignIDStaging)\n" " appConfig.rewardsLoyaltyCampaignType = .spendBased\n" " }\n\n" " if WLRewardsStatusCampaignID > 0 {\n" " appConfig.rewardsStatusCampaignID = NSNumber(value: WLRewardsStatusCampaignID)\n" " appConfig.environmentConfigProd.rewardsStatusCampaignID = appConfig.rewardsStatusCampaignID!\n" " appConfig.environmentConfigStaging.rewardsStatusCampaignID = NSNumber(value: WLRewardsStatusCampaignIDStaging)\n" " appConfig.rewardsStatusCampaignType = .spendBased\n" " }\n\n" " appConfig.analyticsConfiguration = analyticsConfiguration()\n" " appConfig.cardReaderConfiguration = cardReaderConfiguration()\n" " appConfig.crashReportingConfiguration = crashReportingConfiguration()\n" " appConfig.viewControllerConfiguration = viewControllerConfiguration()\n" " appConfig.viewConfiguration = viewConfiguration()\n" " appConfig.cellConfiguration = cellConfiguration()\n" " }\n\n" " @objc open func analyticsConfiguration() -> LUUIAnalyticsConfiguration {\n" " let analyticsConfig: LUUIAnalyticsConfiguration = LUUIAnalyticsConfiguration()\n" " analyticsConfig.analyticsClass = WLAnalyticsWrapper.self\n" " return analyticsConfig\n" " }\n\n" " @objc open func cardReaderConfiguration() -> LUUICardReaderConfiguration {\n" " let cardReaderConfig: LUUICardReaderConfiguration = LUUICardReaderConfiguration()\n" " cardReaderConfig.cardReaderViewControllerClass = WLCardReaderViewController.self\n" " return cardReaderConfig\n" " }\n\n" " @objc open func crashReportingConfiguration() -> LUUICrashReportingConfiguration {\n" " let crashReportingConfig: LUUICrashReportingConfiguration = LUUICrashReportingConfiguration()\n" " crashReportingConfig.crashReportingWrapperClass = WLCrashlyticsWrapper.self\n" " return crashReportingConfig\n" " }\n\n" " @objc open override func tabBarViewControllers() -> [Any]? {\n" " return UITabBarController.loggedInTabBarController()\n" " }\n\n" " @objc open func viewConfiguration() -> LUUIViewConfiguration {\n" " let config = LUUIViewConfiguration()\n\n" " config.imageRewardProgressionViewClass = WLImageRewardProgressionView.self\n\n" " return config\n" " }\n\n" " @objc open func viewControllerConfiguration() -> LUUIViewControllerConfiguration {\n" " let config = LUUIViewControllerConfiguration()\n\n" " config.confirmGiftCardOrderViewControllerClass = WLConfirmGiftCardOrderViewController.self\n" " config.forgotPasswordViewControllerClass = WLForgotPasswordViewController.self\n" " config.getStartedViewControllerClass = WLGetStartedViewController.self\n" " config.interstitialViewControllerClass = WLInterstitialViewController.self\n" " config.inviteFriendsViewControllerClass = WLInviteFriendsViewController.self\n" " config.logInViewControllerClass = WLLogInViewController.self\n" " config.mapLocationsLocationDetailViewControllerClass = WLMapLocationsLocationDetailViewController.self\n" " config.mapLocationsSearchViewControllerClass = WLMapLocationsSearchViewController.self\n" " config.mapLocationsViewControllerClass = WLMapLocationsViewController.self\n" " config.orderAheadLandingViewControllerClass = WLOrderAheadLandingViewController.self\n" " config.orderGiftCardViewControllerClass = WLOrderGiftCardViewController.self\n" " config.paymentMethodDetailViewControllerClass = WLPaymentMethodDetailViewController.self\n" " config.payViewControllerClass = WLPayViewController.self\n" " config.scanSuccessViewControllerClass = WLScanSuccessViewController.self\n" " config.selectPaymentPreferenceViewControllerClass = WLSelectPaymentPreferenceViewController.self\n" " config.settingsViewControllerClass = WLSettingsViewController.self\n" " config.signUpViewControllerClass = WLSignUpViewController.self\n" " config.signUpOrLogInViewControllerClass = WLSignUpOrLogInViewController.self\n" " config.transactionDetailViewControllerClass = WLTransactionDetailViewController.self\n" " config.transactionHistoryViewControllerClass = WLTransactionHistoryViewController.self\n" " config.rewardsStatusLevelsViewControllerClass = WLRewardsStatusLevelsViewController.self\n" " config.permissionPrimerViewControllerClass = WLPermissionPrimerViewController.self\n" " config.selectPaymentMethodViewControllerClass = WLSelectPaymentMethodViewController.self\n" " config.availableRewardsDrawerViewControllerClass = WLAvailableRewardsDrawerViewController.self\n" " config.modularRewardsViewControllerClass = WLModularRewardsViewController.self\n\n" " return config\n" " }\n\n" " @objc open func cellConfiguration() -> LUUICellConfiguration {\n" " let config = LUUICellConfiguration()\n\n" " config.captionedImageHeaderViewCellClass = WLCaptionedImageHeaderViewCell.self\n" " config.locationCellClass = WLLocationCell.self\n" " config.mapLocationsButtonsCellClass = WLMapLocationsButtonsCell.self\n" " config.mapLocationsLocationCellClass = WLMapLocationsLocationCell.self\n" " config.transactionEarnedCreditCellClass = WLTransactionEarnedCreditCell.self\n" " config.transactionHistoryCellClass = WLTransactionHistoryCell.self\n" " config.statusLevelGoalCellClass = WLStatusLevelGoalCell.self\n" " config.availableRewardIconTableViewCellClass = WLAvailableRewardIconTableViewCell.self\n" " config.orderAheadSpecialInstructionsCellClass = WLOrderAheadSpecialInstructionsCell.self\n" " config.orderAheadCategoryMenuListTableViewCellClass = WLOrderAheadCategoryMenuListTableViewCell.self\n\n" " return config\n" " }\n\n" " @objc open override func settingsSectionsData() -> LUUIStaticTableViewData {\n" " let data = LUUIStaticTableViewSectionsData()\n\n" " data.add(WLStaticTableViewSectionFactory.customSocialSection())\n" " data.add(WLStaticTableViewSectionFactory.customAccountSection())\n" " data.add(WLStaticTableViewSectionFactory.customHelpSection())\n\n" " return data\n" " }\n\n" "}\n") matches = re.search(regex, test_str, re.MULTILINE) 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