open("test", "w+") works even better.
Jeff
Jeff Johnson
[EMAIL PROTECTED]
SanDC, Inc.
623-582-0323
Fax 623-869-0675
Paul McNett wrote:
> Paul McNett wrote:
>
>> Ed Leafe wrote:
>>
>>> On Jan 15, 2008, at 3:39 PM, Jeff Johnson wrote:
>>>
>>>> Thank Ed. But it IS a file object so I can pass it to:
>>>>
>>>> cp = ConfigParser.ConfigParser()
>>>> cp.readfp(f)
>>>>
>>>> Right? It appears to work fine.
>>> If you open it for write, it should be a zero-byte file. You would
>>> normally open the file for read (i.e., no parameter) before passing
>>> it to something that needs to read it.
>> AFAIK (but test it for yourself at the command line), you either open
>> files read-only or write-only. IOW, if I open a file with 'w', I can
>> write to it but not read from it. I just tried that and got an exception
>> trying to read from it 'bad file descriptor'.
>>
>> If you want to open up a file to write to without first erasing its
>> contents, you use 'w+' mode.
>
> Oops, back to Python 101 for me:
>
> open("test", "r") -> read-only
> open("test", "w") -> write-only
> open("test", "w+") -> read/write
> open("test", "a") -> append-only
> open("test", "a+") -> append/read
>
> There are additional mode codes, such as 'b' which tells it not to
> automatically add newlines, which is usually what you want.
>
> Paul
>
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