Denpendencies:
1.libgit2:
 git clone git://github.com/libgit2/libgit2.git
 cd libgit2
 git checkout v0.19.0//pygit2 0.19.x need this version
 mkdir build & cd build
 cmake ..
 cmake --build .
 sudo cmake --build . --target install
2.pygit2(need pythonXX-dev)
 git clone git://github.com/libgit2/pygit2.git
 cd pygit2
 python setup.py install
 python setup.py test
3.webpy(download to your project)
 git clone git://github.com/webpy/webpy.git
 ln -s webpy/web .
 
Run:
 python demo.py