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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"/\*/?(\n|[^/]|[^*]/)*\*/") test_str = ("/*********************\n" " * test\n" " * multiline\n" " */\n\n" "/* next表示を半透明でなくする (カクつき防止のテスト) */\n" "#content-tips-wrap {\n" " opacity: 1!important;\n" "}\n\n\n" "/* path /_ct/* */\n\n" "/* なるほどねー */\n\n" "/***** compact footer ****/\n" "@import url('/static/dinoportal/custom/content-compactfooter.css');\n\n" "/***** Read All *****/\n" "@import url('/static/dinoportal/custom/content-addmore.css');\n" "@requirejs: url('/static/dinoportal/custom/content-addmore.js');\n\n" "/* endpath */\n\n" "/* ヘッダメニューを常にモバイルと同じにする */\n" "@import url('/static/dinoportal/custom/header-menu-always-mobile.css');\n\n" "/* メニューフィードの写真・カードの先頭を大きく */\n" "@import url('/static/dinoportal/custom/menufeed-big-leading.css');\n\n" "/* 写真・カードのフィードをモバイルで2列表示 */\n" "@import url('/static/dinoportal/custom/feed-card-mobile-2cols.css');\n\n" "/* サイドバーを左に */\n" "@import url('/static/dinoportal/custom/sidebar-left.css');\n\n" "/* サイドバーの要素をブロック分け */\n" "@import url('/static/dinoportal/custom/sidebar-separate.css');\n\n" "/* コンテンツカバー画像をぼかす */\n" "/* @import url('/static/dinoportal/custom/content-cover-blur.css'); */\n\n" "/* 各種色設定 (LESS記法) */\n" "@import url('/static/dinoportal/custom/colors.less');\n" "/* ベース */\n" "@colors-base: hsl(207, 40%, 15%); /* 文字 */\n" "@colors-base-bg: white; /* 背景 */\n" "/* 箱囲み要素 */\n" "@colors-base-box: @colors-base; /* 文字 */\n" "@colors-base-box-bg: fade(@colors-base, 12%); /* 背景 */\n" "/* ヘッダ */\n" "@colors-header: #eee; /* 文字 */\n" "@colors-header-bg: black; /* 背景 */\n" "@colors-header-shadow: black; /* ヘッダ下線 */\n" "/* ヘッダメニュー */\n" "@colors-header-menu: @colors-header; /* 文字 */\n" "@colors-header-menu-bg: @colors-header-bg; /* 背景 */\n" "/* ヘッダメニュー(選択中メニュー) */\n" "@colors-header-menu-active: white; /* 文字 */\n" "@colors-header-menu-active-bg: transparent; /* 背景 */\n" "@colors-header-menu-active-mark: hsl(0,100%,35%); /* 下線 */\n" "/* ウィジェット */\n" "@colors-widget: @colors-base-box; /* 文字 */\n" "@colors-widget-bg: @colors-base-box-bg; /* 背景 */\n" "/* タイトル系 */\n" "@colors-menufeed-title: black; /* メニューフィードのブロックタイトル */\n" "@colors-contents-title: @colors-base; /* フィードのコンテンツタイトル */\n" "/* 写真・カード型フィード */\n" "@colors-cards-bg: #eee; /* 写真・カード型フィードの背景 */\n" "/* コンテンツ */\n" "@colors-content-heading: @colors-base; /* 見出し */\n" "@colors-content-heading-decoration: @colors-base; /* 見出し装飾色 */\n" "@colors-content-subheading: @colors-base; /* 小見出し */\n" "@colors-content-subheading-decoration: @colors-base; /* 小見出し装飾色 */\n" "@colors-content-body-link: @colors-base; /* コンテンツ内リンク */\n" "@colors-content-body-link-active: @colors-base; /* コンテンツ内リンク(アクティブ/ホバー) */\n" "@colors-content-quote: @colors-base-box; /* 引用ボックス(文字) */\n" "@colors-content-quote-bg: @colors-base-box-bg; /* 引用ボックス(背景) */\n" "@colors-content-box: @colors-base-box; /* 箱囲み段落(文字) */\n" "@colors-content-box-bg: @colors-base-box-bg; /* 箱囲み段落(背景) */\n\n\n" "/* モバイルでメニューフィードサイドバーの.widget要素を最下部にまとめる */\n" "/* @adjustwidgets: ~`window._adjustwidgets = {start:10000, step:0}`; */\n\n\n" "/* モバイル、メニューフィード、通常リスト型表示の後続要素のタイトルをボールドに */\n" "@media (max-width:767px) {\n" " #newsfeed .newsfeed-block.newsfeed-all-display-type-list .wfcontent.not-has-display-type .content-title {\n" " font-weight:bold;\n" " font-size:110%;\n" " }\n" "}\n\n" "/* 記事小見出し */\n" ".article > h3 {\n" " border:1px solid hsl(171, 80%, 45%);\n" " padding:.4em .5em .3em 1.5em;\n" " position:relative;\n" "}\n" ".article > h3:before {\n" " content:'';\n" " position:absolute;\n" " top:.4em;\n" " left:.4em;\n" " bottom:.4em;\n" " width:.75em;\n" " background:hsl(171, 80%, 45%);\n" "}\n\n" ".article > h4 {\n" " font-size:100%;\n" " border-left:.2em solid hsl(171, 80%, 45%);\n" " padding-left:.4em;\n" "}\n\n" "/****** banners-2col debug *******/\n" ".banners-2col { position:relative; }\n" ".banners-2col > a > img {\n" " display:block;\n" " width:100%;\n" " margin:0;\n" " padding:0;\n" "}\n" ".banners-2col > a {\n" " margin:0; padding:0;\n" " display:inline-block;\n" " position:relative;\n" " width:49%;\n" " width:-webkit-calc( 50% - 2px );\n" " width:calc( 50% - 2px );\n" " width:~\"calc( 50% - 2px )\"; /* for LESS */\n" " display:inline-block;\n" " vertical-align:top;\n" "}\n" ".banners-2col > a:hover {\n" " text-decoration:none;\n" "}\n" ".banners-2col > a:nth-child(2n+1) {\n" " margin-right:2%;\n" " margin-right:4px;\n" "}\n" ".banners-2col > a:nth-child(n+3) {\n" " margin-top:4px;\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