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Re: Splitting a file from specific column content

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On 22/01/2012 15:39, Arnaud Delobelle wrote:
> On 22 January 2012 15:19, MRAB<python@mrabarnett.plus.com>  wrote:
>
>>  Here's a solution in Python 3:
>>
>>  input_path = "..."
>>  section_1_path = "..."
>>  section_2_path = "..."
>>  section_3_path = "..."
>>
>>  with open(input_path) as input_file:
>>      try:
>>          line = next(input_file)
>>
>>          # Copy section 1.
>>          with open(section_1_path, "w") as output_file:
>>              while line[0]<  "3":
>>                  output_file.write(line)
>>                  line = next(input_file)
>>
>>          # Copy section 2.
>>          with open(section_2_path, "w") as output_file:
>>              while line[5]<  "5":
>>                  output_file.write(line)
>>                  line = next(input_file)
>>
>>          # Copy section 3.
>>          with open(section_3_path, "w") as output_file:
>>              while True:
>>                  output_file.write(line)
>>                  line = next(input_file)
>>      except StopIteration:
>>          pass
>>  --
>>  http://mail.python.org/mailman/listinfo/python-list
>
> Or more succintly (but not tested):
>
>
> sections = [
>      ("3", "section_1")
>      ("5", "section_2")
>      ("\xFF", "section_3")
> ]
>
> with open(input_path) as input_file:
>      lines = iter(input_file)
>      for end, path in sections:
>          with open(path, "w") as output_file:
>              for line in lines:
>                  if line>= end:
>                      break
>                  output_file.write(line)
>
Consider the condition "line >= end".

If it's true, then control will break out of the inner loop and start
the inner loop again, getting the next line.

But what of the line which caused it to break out? It'll be lost.

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Thread

Splitting a file from specific column content Yigit Turgut <y.turgut@gmail.com> - 2012-01-22 06:32 -0800
  Re: Splitting a file from specific column content Roy Smith <roy@panix.com> - 2012-01-22 09:45 -0500
    Re: Splitting a file from specific column content Roy Smith <roy@panix.com> - 2012-01-22 14:26 -0500
    Re: Splitting a file from specific column content Tim Chase <python.list@tim.thechases.com> - 2012-01-22 13:34 -0600
    Re: Splitting a file from specific column content Roy Smith <roy@panix.com> - 2012-01-22 14:37 -0500
      Re: Splitting a file from specific column content Yigit Turgut <y.turgut@gmail.com> - 2012-01-22 12:16 -0800
  Re: Splitting a file from specific column content MRAB <python@mrabarnett.plus.com> - 2012-01-22 15:19 +0000
  Re: Splitting a file from specific column content Arnaud Delobelle <arnodel@gmail.com> - 2012-01-22 15:39 +0000
    Re: Splitting a file from specific column content Yigit Turgut <y.turgut@gmail.com> - 2012-01-22 08:17 -0800
      Re: Splitting a file from specific column content MRAB <python@mrabarnett.plus.com> - 2012-01-22 16:56 +0000
        Re: Splitting a file from specific column content Yigit Turgut <y.turgut@gmail.com> - 2012-01-22 09:47 -0800
    Re: Splitting a file from specific column content Eelco <hoogendoorn.eelco@gmail.com> - 2012-01-22 12:43 -0800
  Re: Splitting a file from specific column content MRAB <python@mrabarnett.plus.com> - 2012-01-22 16:09 +0000
  Re: Splitting a file from specific column content Arnaud Delobelle <arnodel@gmail.com> - 2012-01-22 19:58 +0000
  Re: Splitting a file from specific column content MRAB <python@mrabarnett.plus.com> - 2012-01-22 20:55 +0000

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