Если мы хотим передать URL, которые имеют example.com
и sample-article
, тогда мы можем начать с выражения, похожего на:
(https?:\/\/)?(www\.)?example\.com\/(.+)\/(sample-article)
Test
# coding=utf8
# the above tag defines encoding for this document and is for Python 2.x compatibility
import re
regex = r"(https?:\/\/)?(www\.)?example\.com\/(.+)\/(sample-article)"
test_str = ("example.com/123/sample-article\n"
"example.com/dogs/sample-article\n"
"www.example.com/123/sample-article\n"
"www.example.com/dogs/sample-article\n"
"https://www.example.com/dogs/sample-article\n"
"http://www.example.com/dogs/sample-article")
matches = re.finditer(regex, test_str, re.MULTILINE)
for matchNum, match in enumerate(matches, start=1):
print ("Match {matchNum} was found at {start}-{end}: {match}".format(matchNum = matchNum, start = match.start(), end = match.end(), match = match.group()))
for groupNum in range(0, len(match.groups())):
groupNum = groupNum + 1
print ("Group {groupNum} found at {start}-{end}: {group}".format(groupNum = groupNum, start = match.start(groupNum), end = match.end(groupNum), group = match.group(groupNum)))
# Note: for Python 2.7 compatibility, use ur"" to prefix the regex and u"" to prefix the test string and substitution.
RegEx Circuit
jex.im визуализирует регулярные выражения:
Редактировать:
Если мы хотим проанализировать HTML здесь, было бы намного лучше использовать анализатор HTML.В противном случае изменения нашего выражения станут утомительными и ненужными.
Если бы это было невозможно, мы бы начали с выражения с левыми и правыми границами, похожими на:
href=\"((https?:\/\/www\.example\.com)\/[a-z]+?\/[0-9]+?\/[a-z-]+\/)\"
Test
# coding=utf8
# the above tag defines encoding for this document and is for Python 2.x compatibility
import re
regex = r"href=\"((https?:\/\/www\.example\.com)\/[a-z]+?\/[0-9]+?\/[a-z-]+\/)\""
test_str = "<div id=\"content\" class=\"\" role=\"main\"><article id=\"post-5463\" class=\"post-entry clearfix post-5463 post type-post status-publish format-standard has-post-thumbnail hentry category-13 tag-wordpress\"><div class=\"post-box\"><div class=\"post-header clearfix\"><div class=\"post-format-icon post-format-standard\"> <i class=\"fa fa-pencil\"></i></div><div class=\"post-info-wrap\"><h2 class=\"post-title\"><a href=\"https://www.getastra.com/blog/911/wordpress-hacked-sending-spam/\" title=\"WordPress Website Hacked & Sending Spam: Symptoms, Causes & Cleanup\" rel=\"bookmark\">WordPress Website Hacked & Sending Spam: Symptoms, Causes & Cleanup</a></h2><div class=\"post-meta clearfix\"><ul><li><img style=\"--aspect-ratio:1;\" alt='' data-src='https://secure.gravatar.com/avatar/fc475099fdd637e1ec27d0b5c73cb876?s=35&d=retro&r=g' data-srcset='https://secure.gravatar.com/avatar/fc475099fdd637e1ec27d0b5c73cb876?s=70&d=retro&r=g 2x' class='avatar avatar-35 photo lazyload' height='35' width='35' /></li><li><a href=\"https://www.getastra.com/blog/author/vikas/\" rel=\"author\">By: <span class=\"fn\"></span></a></li><li><i class=\"fa fa-clock-o\"></i><time class=\"entry-date published\" datetime=\"2019-05-09T16:21:26+05:30\">May 9, 2019</time></li><li><i class=\"fa fa-comments\"></i><a href=\"/#respond\" class=\"comments-link\">Leave a comment</a></li></ul></div></div></div><div class=\"post-media\"> <figure class=\"post-thumbnail-wrapper \"> <a href=\"https://www.getastra.com/blog/911/wordpress-hacked-sending-spam/\" title=\"WordPress Website Hacked & Sending Spam: Symptoms, Causes & Cleanup\" rel=\"bookmark\"> <img width=\"748\" height=\"350\" data-srcset=\"https://www.getastra.com/blog/wp-content/uploads/2019/05/CopyofCopyofCopyofTemplate84_4c3eb9ee60c31a6a26529b08360fa628_2000-748x350.png 748w, https://www.getastra.com/blog/wp-content/uploads/2019/05/CopyofCopyofCopyofTemplate84_4c3eb9ee60c31a6a26529b08360fa628_2000.png 750w\" data-src=\"https://www.getastra.com/blog/wp-content/uploads/2019/05/CopyofCopyofCopyofTemplate84_4c3eb9ee60c31a6a26529b08360fa628_2000-748x350.png\" class=\"attachment-blog-featured size-blog-featured wp-post-image lazyload\" alt=\"WordPress Website Hacked & Sending Spam: Symptoms, Causes & Cleanup\" sizes=\"(max-width: 748px) 100vw, 748px\" style=\"--aspect-ratio:2.1371428571429;\" /><div class=\"thumb-overlay\"> <i class=\"fa fa-link\"></i></div> </a> </figure></div><div class=\"post-con</a></li></ul></div></body></html>"
matches = re.finditer(regex, test_str, re.MULTILINE | re.IGNORECASE)
for matchNum, match in enumerate(matches, start=1):
print ("Match {matchNum} was found at {start}-{end}: {match}".format(matchNum = matchNum, start = match.start(), end = match.end(), match = match.group()))
for groupNum in range(0, len(match.groups())):
groupNum = groupNum + 1
print ("Group {groupNum} found at {start}-{end}: {group}".format(groupNum = groupNum, start = match.start(groupNum), end = match.end(groupNum), group = match.group(groupNum)))
# Note: for Python 2.7 compatibility, use ur"" to prefix the regex and u"" to prefix the test string and substitution.
Выход
Match 1 was found at 395-466: href="https://www.getastra.com/blog/911/wordpress-hacked-sending-spam/"
Group 1 found at 401-465: https://www.example.com/blog/911/wordpress-hacked-sending-spam/
Group 2 found at 401-425: https://www.getastra.com
Match 2 was found at 1522-1593: href="https://www.example.com/blog/911/wordpress-hacked-sending-spam/"
Group 1 found at 1528-1592: https://www.example.com/blog/911/wordpress-hacked-sending-spam/
Group 2 found at 1528-1552: https://www.example.com
Match 3 was found at 3065-3136: href="https://www.example.com/blog/911/wordpress-hacked-sending-spam/"
Group 1 found at 3071-3135: https://www.example.com/blog/911/wordpress-hacked-sending-spam/
Group 2 found at 3071-3095: https://www.example.com