Using Drake from Python

A limited subset of the Drake C++ functionality is available from Python. The Drake Python bindings are generated using pybind11, which means that every function or class which is exposed to C++ has been explicitly enumerated in one of the source files inside the drake/bindings/pybind11 folder. These bindings are installed as a single package called pydrake.

Using the Python Bindings

To use the Drake Python bindings, you need to build Drake and then ensure that Python knows where to find the Drake bindings. When building with CMake, the pydrake package will be installed by default to build/install/lib/python2.7/dist-packages. You will need to add this folder to your PYTHONPATH environment variable. For example, if you have Drake installed in /home/user/drake-distro/build/install, then you should do:

export PYTHONPATH="$PYTHONPATH:/home/user/drake-distro/build/install/lib/python2.7/dist-packages"

With your Python path configured appropriately, you should be able to import pydrake:

$ python
Python 2.7.6 (default, Oct 26 2016, 20:30:19)
[GCC 4.8.4] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import pydrake

What’s Available from Python

The most up-to-date demonstrations of what can be done using pydrake are the pydrake unit tests themselves. You can see all of them inside the drake/bindings/python/pydrake/test folder in the Drake source code.