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Re: Using "with" context handler, and catching specific exception?

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Victor Hooi <victorhooi@gmail.com> writes:

>     try:
>         with open('somefile.log', 'wb' as f:
>             f.write("hello there")
>     except IOError as e:
>         logger.error("Uhoh, the file wasn't there").

IOError, as Steven D'Aprano points out, is not equivalent to “file not
found”. Also, you're not doing anything with the exception object, so
there's no point binding it to the name ‘e’.

What you want is the specific FileNotFoundError:

    try:
        with open('somefile.log', 'wb' as f:
            f.write("hello there")
    except FileNotFoundError:
        logger.error("Uhoh, the file wasn't there").

See <URL:http://docs.python.org/3/library/exceptions.html#FileNotFoundError>.

-- 
 \            “Choose mnemonic identifiers. If you can't remember what |
  `\                mnemonic means, you've got a problem.” —Larry Wall |
_o__)                                                                  |
Ben Finney

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Thread

Using "with" context handler, and catching specific exception? Victor Hooi <victorhooi@gmail.com> - 2013-10-21 18:43 -0700
  Re: Using "with" context handler, and catching specific exception? MRAB <python@mrabarnett.plus.com> - 2013-10-22 03:04 +0100
  Re: Using "with" context handler, and catching specific exception? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-10-22 02:48 +0000
  Re: Using "with" context handler, and catching specific exception? Ben Finney <ben+python@benfinney.id.au> - 2013-10-22 14:04 +1100
    Re: Using "with" context handler, and catching specific exception? Victor Hooi <victorhooi@gmail.com> - 2013-10-21 20:27 -0700
      Re: Using "with" context handler, and catching specific exception? Ben Finney <ben+python@benfinney.id.au> - 2013-10-22 14:53 +1100
        Re: Using "with" context handler, and catching specific exception? Victor Hooi <victorhooi@gmail.com> - 2013-10-22 18:11 -0700

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