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Well it fooled me for a while, hope it helps someone else.

SVN is smart enough to infer that you didn't actually bother verifying that the fingerprint matches. But in all seriousness, https://sourceforge.net/apps/trac/sourceforge/wiki/Subversion#Server Certificate Verification Failed notes that you should open the project url in a trusted browser to check you're not being MITM'ed (should work for non-sourceforge too), e.g.

import re import urllib.request import operator # Download wiki page url = "https://en.wikipedia.org/wiki/Diplomatic_history_of_World_War_II" html = urllib.request.urlopen(url).read() # Find all mentioned years in the 20th or 21st century regex = r"\b(? This is another instance where I would strongly recommend using the well-tested libraries and/or services, along with the use of whitelists instead of blacklists, in order to protect your application from malicious inputs.

:19|20)\d\b" matches = re.findall(regex, str(html)) # Form a dict of the number of occurrences of each year year_counts = dict((year, matches.count(year)) for year in set(matches)) # Print the dict sorted in descending order for year in sorted(year_counts, key=year_counts.get, reverse=True): print(year, year_counts[year]) . :[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\[\x01-\x09\x0b\x0c\x0e-\x7f])*")@(? Regex matching speeds can range from not-very-fast to extremely slow, depending on how well the expression is written.

A regular expression (or regex, or regexp) is a way to describe complex search patterns using sequences of characters. :[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]|\[\x01-\x09\x0b\x0c\x0e-\x7f]) )\]) Yeah, we're not going to walk through that one.

The complexity of the specialized regex syntax, however, can make these expressions somewhat inaccessible. One of the most useful ad-hoc uses of regular expressions can be code refactoring.

.action_button.action_button:active.action_button:hover.action_button:focus.action_button:hover.action_button:focus .count.action_button:hover .count.action_button:focus .count:before.action_button:hover .count:before.u-margin-left--sm.u-flex.u-flex-auto.u-flex-none.bullet.

Error Banner.fade_out.modal_overlay.modal_overlay .modal_wrapper.modal_overlay [email protected](max-width:630px)@media(max-width:630px).modal_overlay .modal_fixed_close.modal_overlay .modal_fixed_close:before.modal_overlay .modal_fixed_close:before.modal_overlay .modal_fixed_close:before.modal_overlay .modal_fixed_close:hover:before.

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For instance, here's a more advanced expression from (the aptly named) which matches 99% of RFC 5322 compliant email addresses. Overusing regex is a great way to make your co-workers (and anyone else who needs to work with your code) very angry with you.In this tutorial, I'll attempt to give an provide an approachable introduction to regex syntax and usage in a variety of scenarios, languages, and environments. CSS comments come in the form Parsing languages, from English to Java to JSON, can be a real pain using regex expressions.This web application is my favorite tool for building, testing, and debugging regular expressions. Writing your own regex expression for this purpose is likely to be an exercise in frustration that will result in eventual (or immediate) disaster when an edge case or minor syntax/grammar inconsistency in the data source causes the expression to fail.For example, in the above 24-hour pattern, we've defined two capture groups - one for the hour and one for the minute. Here's how we could use Javascript to parse a 24-hour formatted time into hours and minutes. Once you have confirmed that the input text is an email address, it is best to always follow through with the standard practice of sending a confirmation/activation email. Regex is an incredibly useful tool, but that doesn't mean you should use it everywhere.This is a very simple example which ignores lots of very important email-validity edge cases, such as invalid start/end characters and consecutive periods. If there is an alternative solution to a problem, which is simpler and/or does not require the use of regular expressions, please do not use regex just to feel clever.

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