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

[Rick Johnson]

On Tuesday, December 12, 2017 at 10:42:54 PM UTC-6, eryk sun wrote:
[...]
> That said, I don't see this feature as being very useful
> compared to just using "open with" when I occasionally need
> to open a file with a non-default program.

That's the point i was trying to make, but i think it may
have whoooshed over Chris's head. ;-)