Using 'with open(...) as ...' together with configparser.ConfigParser.read
MRAB
python at mrabarnett.plus.com
Thu Oct 31 13:06:11 EDT 2024
On 2024-10-31 06:47, Loris Bennett via Python-list wrote:
> Jon Ribbens <jon+usenet at unequivocal.eu> writes:
>
>> On 2024-10-30, Loris Bennett <loris.bennett at fu-berlin.de> wrote:
>>> Jon Ribbens <jon+usenet at unequivocal.eu> writes:
>>>> On 2024-10-30, Loris Bennett <loris.bennett at fu-berlin.de> wrote:
>>>>> Jon Ribbens <jon+usenet at unequivocal.eu> writes:
>>>>>> As per the docs you link to, the read() method only takes filename(s)
>>>>>> as arguments, if you have an already-open file you want to read then
>>>>>> you should use the read_file() method instead.
>>>>>
>>>>> As you and others have pointed out, this is indeed covered in the docs,
>>>>> so mea culpa.
>>>>>
>>>>> However, whereas I can see why you might want to read the config from a
>>>>> dict or a string, what would be a use case in which I would want to
>>>>> read from an open file rather than just reading from a file(name)?
>>>>
>>>> The ConfigParser module provides read(), read_file(), read_string(),
>>>> and read_dict() methods. I think they were just trying to be
>>>> comprehensive. It's a bit non-Pythonic really.
>>>
>>> OK, but is there a common situation might I be obliged to use
>>> 'read_file'? I.e. is there some common case where the file name is not
>>> available, only a corresponding file-like object or stream?
>>
>> Well, sure - any time it's not being read from a file. A bit ironic
>> that the method to use in that situation is "read_file", of course.
>> In my view the read() and read_file() methods have their names the
>> wrong way round. But bear in mind this code is 27 years old, and
>> the read() function came first.
>
> Yes, I suppose history has a lot to answer for :-)
>
> However I didn't make myself clear: I understand that there are
> different functions, depending on whether I have a file name or a
> stream. Nevertheless, I just can't think of a practical example where I
> might just have *only* a stream, especially one containing my
> configuration data. I was just interested to know if anyone can give an
> example.
>
What if the config file was inside a zipped folder?
Although I haven't used ConfigParser like that, I have read the contents
of files that are in a zipped folder. It means that I don't have to
extract the file first.
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