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POHow do I put all the strings that match my regular expression into a list in Python?
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copied!<p>So in my Python script, I open up a text file containing dates of the format "January, 26, 1991"</p> <p>Here is my regular expression:</p> <pre><code>pattern = """ (?:(September|April|June|November),\ (0?[1-9]|[12]\d|30),\ ((?:19|20)\d\d))#Months with 30 days |(?:(January|March|May|July|August|October|December),\ (0?[1-9]|[12]\d|3[01]),\ ((?:19|20)\d\d))#Months with 31 days |(?:February, (?:(?:(0?[1-9]|1\d|2[0-8]),\ ((?:19|20)\d\d))|(?:(29),\ ((?:(?:19|20)(?:04|08|12|16|20|24|28|32|36|40|44|48|52|56|60|64|68|72|76|80|84|88|92|96))|2000))))#February with 28 days or 29 with a leap year """ r = re.compile(pattern, re.VERBOSE) </code></pre> <p>This regular expression should match any real date including February 29 on leap years.</p> <p>The problem I am having is figuring out a way to go through my opened text file and put all of the matched dates into a list. I've tried using .match, .search, .split and the other ones but I haven't had any luck. Is there a way to put all matches into a list as a string so that I can easily compare the list to another and find all the dates that are in both lists? Basically I would like a list to come out looking like </p> <p>["January, 1, 1990", "February, 29, 2012", "December, 25, 1945",....]</p> <p>Also, please let me know if the regular expression I have is correct. I modified it from the answer to another question I had and I'm not sure whether I have it right since I'm not able to see whether the dates in my text file were matched or not.</p>

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