Find if a file existing within 1000s of folder/sub-folder - each file has a unique presence

[MRAB]

On 2015-05-21 17:31, Grant Edwards wrote:
> On 2015-05-21, Chris Angelico <rosuav at gmail.com> wrote:
>> On Fri, May 22, 2015 at 12:14 AM, Grant Edwards <invalid at invalid.invalid> wrote:
>>> On 2015-05-21, Steven D'Aprano <steve+comp.lang.python at pearwood.info> wrote:
>>>
>>>> import glob
>>>> print(glob.glob("c:/abc/def/ghjmain/features/XYZ/*<filename>"))
>>>>
>>>> Don't use backslashes \ as they have special meaning to Python. Use forward
>>>> slashes and let Python convert them as needed.
>>>
>>> Interesting. I've never heard about this.
>>>
>>> When will Python convert them?
>>
>> Actually, it won't ever bother to convert them.
>
> OK, so this isn't some new feature I hadn't heard about due to my
> spending most of my time with 2.7. :)
>
>> The Windows file system APIs are quite happy to work with forward
>> slashes;
>
> Yep, I knew that -- I have always use forward slashes on Windows (and
> DOS before that) when dealing with the file system.
>
>> it's only command-line tools (which conventionally use forward
>> slashes to introduce options), and not all of them, which require
>> backslashes.
>
Dialog boxes, however, insist on backslashses.

> Yup, I was wondering if that was where Python (or its stdlib) would
> convert them (which would have surprised me).  Back in the day, you
> could change the 'option switch' character from '/' to whatever you
> wanted (and as an old Unix guy, I always set it to '-').  Then you
> could even use forward slashes on the command line (mostly). But, I
> don't think Windows has support that for yonks.
>