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Hello,

some time ago I contributed a couple of patches to speedup shutil.copy\*() functions:

I would like to backport both functionalities so that they can be used on Python 2.7 and <3.8 and put it on PYPI. In order to do so I will basically have to copy some parts of shutil module (copytree() function + the unit-tests I added in BPO-33671 and a couple of other things). Are there constraints regarding this in terms of license? Am I supposed to use GPL? (I was thinking about using MIT)

Note: in this package called "zerocopy" I will probably want to expose other functionalities such as tee(), splice() and CopyFileEx and TransmitFile on Windows, so it's probably gonna be half a backport and half a brand new project.

Thanks.

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