Description

A few examples to illustrate the main steps required to build and call Fortran code from Python with the following tools:

Tool	Pros	Cons
ctypes	Allows for tailor-made wrappers. C-API as byproduct.	C-bindings and Python-bindings must be written for all data types and procedures (besides the manual effort, some aspects are not intuitive at all).
f2py	Little/no manual work. Fortran procedures are automatically given a Pythonic signature. Array dimensions become optional arguments.	No support for derived data types, abstract interfaces, etc. No possibility for wrapper customization.
f90wrap	Support for derived data types, abstract interfaces, etc. Can parse Doxygen (but not FORD) docstrings.	Procedure signatures remain unchanged (Fortranic, not Pythonic). Procedures with callbacks are excluded (bug?). Support seems limited (just an impression).
gfort2py	to do!	to do!

A rather comprehensive list of tools to invoke Fortran code from Python can be found here.