Whoops! It didn't say "the executable that gets built is called python.exe", but it is in the build section, so taking things literally, yes, the executable is called python.exe and I maybe should have taken it at its word.

There's a subtle problem in the wording since "the executable" almost always suggests "the program you run". It's a little weird -- though I see your point about why it's done that way -- to build an executable that gets installed as a different name. (Well, maybe installed with  version number as part of the name.) So even if the README is literally correct I do think it lays a subtle trap for the reader that could be avoided with a slight rewording.  Not important -- I'm just trying to help by pointing out documentation problems as I come across them. Most of them have been real.
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        --- Mitchell