I learned from chatting with lifeless and dstufft that the PKG-INFO vs METADATA file isn't related to package metadata version at all -- it's two different packaging formats described in PEP 0376 [1] and PEP 0427 [2].
[1] http://legacy.python.org/dev/peps/pep-0376/#how-distributions-are-installed [2] http://legacy.python.org/dev/peps/pep-0427/#the-dist-info-directory
I learned from chatting with lifeless and dstufft that the PKG-INFO vs METADATA file isn't related to package metadata version at all -- it's two different packaging formats described in PEP 0376 [1] and PEP 0427 [2].
[1] http:// legacy. python. org/dev/ peps/pep- 0376/#how- distributions- are-installed legacy. python. org/dev/ peps/pep- 0427/#the- dist-info- directory
[2] http://