graphviz conda package is no Python package. It simply puts the graphviz files into your virtual env's
Library/ directory. Look e.g. for
dot.exe in the
~~To install the
graphviz Python package, you can use
conda install pip and
pip install graphviz. Always prefer conda packages if they are available over pip packages. Search for the package you need (
conda search pkgxy) and then install it (
conda install pkgxy). If it is not available, you can always build your own conda packages or you can try anaconda.org for user-built packages.~~
Update : There exists now a
python-graphviz package at Anaconda.org which contains the Python interface for the
graphviz tool. Simply install it with
conda install python-graphviz.
(Thanks to wedran and g-kaklam for posting this solution and to endolith for notifying me).