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POpython regex split any \W+ with some exceptions
 

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  1. POpython regex split any \W+ with some exceptions
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    <p>it is easy to split text using regex at non-alpha characters:</p> <pre><code>tokens=re.split(r'(?u)\W+',text) #to split at any non-alpha unicode character </code></pre> <p>and <a href="https://stackoverflow.com/questions/12683201/python-re-split-to-split-by-spaces-commas-and-periods-but-not-in-cases-like">This answer</a> provides a way to split at certain characters. However, what I need is:</p> <ol> <li>splitting at any unicode non-alpha</li> <li><p>give regex the following exceptions:</p> <ul> <li>underscores "_" </li> <li>this slash"/" </li> <li>ampersand "&amp;" and at sign "@" </li> <li>fullstops surrounded by digits \d+ </li> <li>fullstops preceded by certain arbitrary strings "Mr.", "Dr."...etc</li> </ul></li> </ol> <p>I can easily detect any of these using regex, but the question is how to tell regex to have them as exceptions to the splitting at non-alpha.</p> <hr> <p>EDIT: Here is an example text I am trying to match:</p> <pre><code>text="Mr. Jones email jones@gmail.com 12.455 12,254.25 says This is@a&amp;test example_cool man+right more/fun 43.35. And so we stopped. And then we started again. وبعدها رجعنا إلى المنزل، وقابلنا أصدقاءنا؛ وشربنا الشاي." </code></pre> <p>and here is its version in unicode (notice the non-alpha characters in Arabic u'\u060c', u'\u061b')</p> <pre><code>unicode_text=u'Mr. Jones email jones@gmail.com 12.455 12,254.25 says This is@a&amp;test example_cool man+right more/fun 43.35. And so we stopped. And then we started again. \u0648\u0628\u0639\u062f\u0647\u0627 \u0631\u062c\u0639\u0646\u0627 \u0625\u0644\u0649 \u0627\u0644\u0645\u0646\u0632\u0644\u060c \u0648\u0642\u0627\u0628\u0644\u0646\u0627 \u0623\u0635\u062f\u0642\u0627\u0621\u0646\u0627\u061b \u0648\u0634\u0631\u0628\u0646\u0627 \u0627\u0644\u0634\u0627\u064a.' </code></pre> <p>Here is the result of the regex in the answer provided:</p> <pre><code>re.split(r'(?u)(?![\+&amp;\/@\d+\.\d+Mr\.])\W+',unicode_text) </code></pre> <blockquote> <p>[u'Mr.', u'Jones', u'email', u'jones@gmail.com', u'12.455', u'12', u'254.25', u'says', u'This', u'is@a&amp;test', u'example_cool', u'man+right', u'more/fun', u'43.35.', u'And', u'so', u'we', u'stopped.', u'And', u'then', u'we', u'started', u'again.', u'\u0648\u0628\u0639\u062f\u0647\u0627', u'\u0631\u062c\u0639\u0646\u0627', u'\u0625\u0644\u0649', u'\u0627\u0644\u0645\u0646\u0632\u0644', u'\u0648\u0642\u0627\u0628\u0644\u0646\u0627', u'\u0623\u0635\u062f\u0642\u0627\u0621\u0646\u0627', u'\u0648\u0634\u0631\u0628\u0646\u0627', u'\u0627\u0644\u0634\u0627\u064a.']</p> </blockquote> <p>Notice that the regex did not split around fullstops at the end of words. So it would be nice to have something to deal with this</p>
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    1. COyes, this is what I want
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    2. COSo what have you tried ? This is quite simple except for the last parts. Note that `\w` matches alphanumeric characters and an underscore `_` ! So `\W` is exactly the reverse of it.
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    3. COI tried this: tokens=re.split('(?u)[^\w_@/]|(?<!\d)[,.](?!\d)',string) but didn't work...
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