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Re:Save to a file, but avoid overwriting an existing file

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 zoom <zoom@yahoo.com> Wrote in message:
> Hi!
> 
> I would like to assure that when writing to a file I do not overwrite an 
> existing file, but I'm unsure which is the best way to approach to this 
> problem. As I can see, there are at least two possibilities:
> 
> 1. I could use fd = os.open("x", os.O_WRONLY | os.O_CREAT | os.O_EXCL)
> which will fail - if the file exists. However, I would prefer if the 
> program would try to save under different name in this case, instead of 
> discarding all the calculation done until now - but I' not too well with 
> catching exceptions.
> 

The tempfile module is your best answer,  but if you really need
 to keep the file afterwards,  you'll have the same problem when
 you rename it later. 

I suggest you learn about try/except.  For simple cases it's not
 that tough, though if you want to ask about it, you'll need to
 specify your Python version. 

-- 
DaveA

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Thread

Save to a file, but avoid overwriting an existing file zoom <zoom@yahoo.com> - 2014-03-12 13:29 +0100
  Re: Save to a file, but avoid overwriting an existing file Skip Montanaro <skip@pobox.com> - 2014-03-12 07:37 -0500
  Re: Save to a file, but avoid overwriting an existing file Tim Chase <python.list@tim.thechases.com> - 2014-03-12 08:33 -0500
  Re:Save to a file, but avoid overwriting an existing file Dave Angel <davea@davea.name> - 2014-03-12 14:22 -0400
  Re: Save to a file, but avoid overwriting an existing file Emile van Sebille <emile@fenx.com> - 2014-03-12 12:38 -0700
  Re: Save to a file, but avoid overwriting an existing file Cameron Simpson <cs@zip.com.au> - 2014-03-13 09:19 +1100
  Re: Save to a file, but avoid overwriting an existing file Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-03-12 23:04 +0000
  Re: Save to a file, but avoid overwriting an existing file Ben Finney <ben+python@benfinney.id.au> - 2014-03-13 11:22 +1100

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