Revert "py2 -> py3"
Revert "py2 -> py3"

This reverts commit 78f48eb67990607e9952b360310e735e7fa73284.
wrong commit message

dstoe/vigra,dstoe/vigra,funkey/vigra,funkey/vigra,dagophil/vigra,dagophil/vigra,funkey/vigra,dstoe/vigra,dstoe/vigra,dagophil/vigra,dagophil/vigra,funkey/vigra,funkey/vigra,dstoe/vigra,funkey/vigra,dagophil/vigra,dagophil/vigra,dagophil/vigra,dstoe/vigra,funkey/vigra,dstoe/vigra