[Python-Dev] PEP 3147 ready for pronouncement and merging

[Isaac Morland]

On Tue, 13 Apr 2010, Barry Warsaw wrote:

> I am attaching the latest revision of PEP 3147 to this message, which is 
> also available here:
>
> http://www.python.org/dev/peps/pep-3147/
[....]
> PEP: 3147
> Title: PYC Repository Directories
[....]
> Further, pyc files will contain a magic string that differentiates the
> Python version they were compiled for.  This allows multiple byte
> compiled cache files to co-exist for a single Python source file.
>
> This scheme has the added benefit of reducing the clutter in a Python
> package directory.
>
> When a Python source file is imported for the first time, a
> `__pycache__` directory will be created in the package directory, if
> one does not already exist.  The pyc file for the imported source will
> be written to the `__pycache__` directory, using the magic-tag
> formatted name.  If either the creation of the `__pycache__` directory
> or the pyc file inside that fails, the import will still succeed, just
> as it does in a pre-PEP-3147 world.
[....]

Thank you for doing the work on this improvement.

I have one wording suggestion which I hope isn't bikeshedding: up above, I 
think the sentence containing "pyc files will contain a magic string" 
would be clearer if it made it clear that the file *names*, not (just?) 
the file contents, will contain the magic tag.

Isaac Morland			CSCF Web Guru
DC 2554C, x36650		WWW Software Specialist