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File to dict

Neil Cerutti horpner at yahoo.com
Fri Dec 7 11:14:59 EST 2007 
On 2007-12-07, Duncan Booth <duncan.booth at invalid.invalid> wrote:
> Neil Cerutti <horpner at yahoo.com> wrote:
>
>> On 2007-12-07, Duncan Booth <duncan.booth at invalid.invalid> wrote:
>>> from __future__ import with_statement
>>>
>>> def loaddomainowners(domain):
>>>     with open('/etc/virtual/domainowners','r') as infile:
>> 
>> I've been thinking I have to use contextlib.closing for
>> auto-closing files. Is that not so?
>> 
> That is not so.
>
> Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit 
> (Intel)] on win32
> Type "help", "copyright", "credits" or "license" for more information.
>>>> from __future__ import with_statement
>>>> with open('diffs.txt') as f:
> ...    print len(list(f))
> ...
> 40
>>>> f
><closed file 'diffs.txt', mode 'r' at 0x00AA0698>

Thanks. After seeing your answer I managed to find what I'd
overlooked before, in the docs for file.close:

  As of Python 2.5, you can avoid having to call this method
  explicitly if you use the with statement. For example, the
  following code will automatically close f when the with block
  is exited: 
  
    from __future__ import with_statement
    
    with open("hello.txt") as f:
        for line in f:
            print line

-- 
Neil Cerutti
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