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PO
primarykey
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7070959
data
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0
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0
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1
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2011-08-15T21:18:30.843
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2011-08-15T22:59:01.100
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2011-08-15T22:59:01.100
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2
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text
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<pre><code>import datetime import re givenURL = 'http://site.com/?year=2011&month=10&day=5&hour=11' givenTime = '08:53PM' print ' givenURL == ' + givenURL print 'givenTime == ' + givenTime regx = re.compile('year=(\d\d\d\d)&month=(\d\d?)&day=(\d\d?)&hour=\d\d?') print '\nmap(int,regx.search(givenURL).groups()) ==',map(int,regx.search(givenURL).groups()) theDate = datetime.date(*map(int,regx.search(givenURL).groups())) theTime = datetime.datetime.strptime(givenTime, "%I:%M%p") print '\ntheDate ==',theDate,type(theDate) print '\ntheTime ==',theTime,type(theTime) theDateTime = theTime.replace(theDate.year,theDate.month,theDate.day) print '\ntheDateTime ==',theDateTime,type(theDateTime) </code></pre> result <pre><code> givenURL == http://site.com/?year=2011&month=10&day=5&hour=11 givenTime == 08:53PM map(int,regx.search(givenURL).groups()) == [2011, 10, 5] theDate == 2011-10-05 <type 'datetime.date'> theTime == 1900-01-01 20:53:00 <type 'datetime.datetime'> theDateTime == 2011-10-05 20:53:00 <type 'datetime.datetime'> </code></pre> <h2>Edit 1</h2> As strptime() is slow, I improved my code to eliminate it <pre><code>from datetime import datetime import re from time import clock n = 10000 givenURL = 'http://site.com/?year=2011&month=10&day=5&hour=11' givenTime = '08:53AM' # eyquem regx = re.compile('year=(\d\d\d\d)&month=(\d\d?)&day=(\d\d?)&hour=\d\d? (\d\d?):(\d\d?)(PM|pm)?') t0 = clock() for i in xrange(n): given = givenURL + ' ' + givenTime mat = regx.search(given) grps = map(int,mat.group(1,2,3,4,5)) if mat.group(6): grps[3] += 12 # when it is PM/pm, the hour must be augmented with 12 theDateTime1 = datetime(*grps) print clock()-t0,"seconds eyquem's code" print theDateTime1 print # Artsiom Rudzenka dateandtimePattern = "http://site.com/?year=%Y&month=%m&day=%d&time=%I:%M%p" t0 = clock() for i in xrange(n): theDateTime2 = datetime.strptime(givenURL.split('&hour=')[0] + '&time=' + givenTime, dateandtimePattern) print clock()-t0,"seconds Artsiom's code" print theDateTime2 print print theDateTime1 == theDateTime2 </code></pre> result <pre><code>0.460598763251 seconds eyquem's code 2011-10-05 08:53:00 2.10386180366 seconds Artsiom's code 2011-10-05 08:53:00 True </code></pre> My code is 4.5 times faster. That may be interesting if there are a lot of such transformations to perform
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1. This table or related slice is empty.
PostParentId
1. PORetrieving a date from a complex string in Python
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PostTypePostTypeId
1. PTAnswer
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1. USeyquem
UserOwnerUserId
1. USeyquem
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1. COVery impressive, but unfortunately your method is a bit less legible than the other method and thus, someone at my skill level is likely to get a bit lost in it. Thanks for the input, pretty cool way of going about it.
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