NumPy is the fundamental package needed for scientific computing with Python. It contains among other things:
SciPy is open-source software for mathematics, science, and engineering. It is also the name of a very popular conference on scientific programming with Python. The SciPy library depends on NumPy, which provides convenient and fast N-dimensional array manipulation. The SciPy library is built to work with NumPy arrays, and provides many user-friendly and efficient numerical routines such as routines for numerical integration and optimization.
pyMPI is a project integrating the Message Passing Interface (MPI) into the Python interpreter.
