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Re: Best way to rewrite Popen

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Op Wednesday 20 May 2015 01:20 CEST schreef MRAB:

> On 2015-05-19 23:23, Cecil Westerhof wrote:
>> Op Tuesday 19 May 2015 23:28 CEST schreef Jon Ribbens:
>>
>>> On 2015-05-19, Cecil Westerhof <Cecil@decebal.nl> wrote:
>>>> It looks like that this does what I want (the dot is needed so
>>>> that it also works with 2.7): files = sorted(os.listdir('.')) p =
>>>> re.compile('actions-2015-05-[0-9][0-9].sql$') current_month = [
>>>> file for file in files if p.match(file) ]
>>>
>>> You could instead do (in Python 2 or 3):
>>>
>>> files = glob.glob("actions-2015-05-[0-9][0-9].sql")
>>> files.sort()
>>
>> Something to remember.
>>
>> But in this case I also need the previous month. So I have:
>> files           = sorted(os.listdir('.'))
>> p               = re.compile('actions-2015-05-[0-9][0-9].sql$')
>> current_month   = [ file for file in files if p.match(file) ]
>> p               = re.compile('actions-2015-04-[0-9][0-9].sql$')
>> previous_month  = [ file for file in files if p.match(file) ]
>>
>> Of-course I will not hard-code the months in the real code.
>>
> In a regex, '.' will match any character except '\n', or any
> character at all if the DOTALL ('(?s)') flag in turned on. If you
> want to match an actual '.', you should escape it like this: r'\.'.
> (And if you're using backslashes in a string literal, make it a raw
> string literal!)
>
> p = re.compile(r'actions-2015-05-[0-9][0-9]\.sql$')

Oops, you are correct.

It is now:
    start               = database + '-'
    end                 = r'-[0-9][0-9]\.sql$'
    p                   = re.compile(start + current_month  + end)
    current_month_lst   = [ file for file in files if p.match(file) ]
    p                   = re.compile(start + previous_month + end)
    previous_month_lst  = [ file for file in files if p.match(file) ]

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof

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Best way to rewrite Popen Cecil Westerhof <Cecil@decebal.nl> - 2015-05-19 19:01 +0200
  Re: Best way to rewrite Popen Jon Ribbens <jon+usenet@unequivocal.co.uk> - 2015-05-19 17:36 +0000
    Re: Best way to rewrite Popen Cecil Westerhof <Cecil@decebal.nl> - 2015-05-19 21:13 +0200
      Re: Best way to rewrite Popen Jon Ribbens <jon+usenet@unequivocal.co.uk> - 2015-05-19 20:14 +0000
      Re: Best way to rewrite Popen Cecil Westerhof <Cecil@decebal.nl> - 2015-05-19 22:19 +0200
        Re: Best way to rewrite Popen Jon Ribbens <jon+usenet@unequivocal.co.uk> - 2015-05-19 21:28 +0000
          Re: Best way to rewrite Popen Cecil Westerhof <Cecil@decebal.nl> - 2015-05-20 00:23 +0200
            Re: Best way to rewrite Popen MRAB <python@mrabarnett.plus.com> - 2015-05-20 00:20 +0100
              Re: Best way to rewrite Popen Cecil Westerhof <Cecil@decebal.nl> - 2015-05-20 02:15 +0200
  Re: Best way to rewrite Popen Jonas Wielicki <jonas@wielicki.name> - 2015-05-19 19:43 +0200
  Re: Best way to rewrite Popen Chris Angelico <rosuav@gmail.com> - 2015-05-20 03:47 +1000
  Re: Best way to rewrite Popen Zachary Ware <zachary.ware+pylist@gmail.com> - 2015-05-19 12:55 -0500
  Re: Best way to rewrite Popen Chris Angelico <rosuav@gmail.com> - 2015-05-20 04:13 +1000
  Re: Best way to rewrite Popen Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-05-20 03:23 +0200

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