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PORegex to get list of all words with specific letters (unicode graphemes)
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copied!<p>I'm writing a Python script for a FOSS language learning initiative. Let's say I have an XML file (or to keep it simple, a Python list) with a list of words in a particular language (in my case, the words are in Tamil, which uses a Brahmi-based Indic script). </p> <p>I need to draw out the subset of those words that can be spelled using just those letters. </p> <p>An English example: </p> <pre><code>words = ["cat", "dog", "tack", "coat"] get_words(['o', 'c', 'a', 't']) should return ["cat", "coat"] get_words(['k', 'c', 't', 'a']) should return ["cat", "tack"] </code></pre> <p>A Tamil example: </p> <pre><code>words = [u"மரம்", u"மடம்", u"படம்", u"பாடம்"] get_words([u'ம', u'ப', u'ட', u'ம்') should return [u"மடம்", u"படம்") get_words([u'ப', u'ம்', u'ட') should return [u"படம்"] </code></pre> <p>The order that the words are returned in, or the order that the letters are entered in should not make a difference. </p> <p>Although I understand the difference between unicode codepoints and graphemes, I'm not sure how they're handled in regular expressions. </p> <p>In this case, I would want to match only those words that are made up of the specific graphemes in the input list, and nothing else (i.e. the markings that follow a letter should only follow that letter, but the graphemes themselves can occur in any order).</p>

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