Python Xeger: Python library to generate random strings from regular expressions.rstr Random Strings in Python is a helper module to generating random strings of various types fuzzy testing, generating dummy data, etc.sre_yield: a Python library, generate all values that can match a given regular expression, or count possible matches efficiently.The principle is: Regex -> NFA, NFA -> minimal DFA, DFS-walk through the DFA (collecting all characters) Python (and a general GA RE usage guide) Utilities Reverse Regex Random String Generators / Xeger PHP Live Regex A Live Regular Expression Tester for PHP R The most useful tools (in my view) for the specific flavor are listed first, then alternative and secondary testers follow.NET Regex Tester The order of the listings is intentional. Here are language/flavor specific online regex testers listed. Currently has about 8000 expressions from roughly 2500 contributors (most are subpar IMHO). RegexGuide not a real geneartor, more a learning tool that shows how a simple regex pattern could look like based on user input and some user requirements.Available as a command line utility (Clojure) and a JavaScript library. frak frak transforms collections of strings into regular expressions.Regex Generator++ Automatic Generation of Text Extraction Patterns from Examples.txt2re: regular expression generator (with code generator for Perl, PHP php python java javascript coldfusion c c++ ruby vb vbscript j# c# c++.net vb.net).Regex Expression Generator, Code Generator & Explanator RexV2 Evaluator for PHP PCRE, PHP Posix!, Perl, Python, Javascript, Node.JS!.regexper translates regular expressions into an SVG image (for documentation or embedding).debuggex Shows neat expression diagrams (not active anymore).regexr Online regex tester with good regex replace and explain functionality.
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