Squashed 'dblp-python/' content from commit ac22170

git-subtree-dir: dblp-python
git-subtree-split: ac22170dfdb8d0bd46063a2c0612c1839e870540
Merge commit '6766961a58a63084e91e6eef6c18cb85b61a897e' as 'dblp-python'
this time should add subtree right