Using SHTns with Python

SHTns provides a Python interface that uses NumPy arrays to perform Spherical Harmonic Transforms.

The Python interface has been generated using SWIG (but you don't need it to compile the the Python package).

• Compile using (see also Compiling and installing SHTns)

   ./configure --enable-python
  make
  make install 

  Optionally you can indicate an alternate pyhton interpreter to ./configure using PYTHON=<my-python> (see ./configure –help).
  If you cannot install as root, you can alternatively intall the python package as user, replacing

  make install 

  with

  python setup.py install --user 

• Use within a python script or shell

  import shtns 

To start using SHTns you must then create an sht object, from which you can call the transform functions and more. The arrays should be created using NumPy.

See Also

See the Python example to get started, and the full working example shallow_water.py that solves the non-linear shallow water equations.

In case of segfaults, you may have alignment problems (should not occur on 64 bit systems). Please file a bugreport or contact the author.