Please tell me how to execute python file in Ubuntu by double

[Grant Edwards]

On 2017-12-15, Steve D'Aprano <steve+python at pearwood.info> wrote:
> On Fri, 15 Dec 2017 09:48 am, Gregory Ewing wrote:
[...]
> Classic MacOS associated two such pieces of metadata with each file: the
> creator and type. [...]
>
> https://en.wikipedia.org/wiki/Creator_code
>
>> I believe MacOSX also has the ability to store a file type as
>> metadata, but it doesn't seem to be used much.
>
> They are still supported (-ish) by OS X, but have been superseded by Uniform
> Type Identifiers.

Where are the UTIs stored?  Do OS X filesystems still have a "resource
fork"?

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