This time use a patch to mangle the project files a bit so that msbuild likes them.
31bf50b Make python3 build with VS2013
external/python3/UnpackedTarball_python3.mk | 8 +
external/python3/python-vc2013.patch.1 | 1213 +++++++++++++++++++++++++++
2 files changed, 1221 insertions(+)
Upstream: cgit.freedesktop.org