This is documentation for an old release of NumPy (version 1.17). Read this page Search for this page in the documentation of the latest stable release (version 2.2).

F2PY Users Guide and Reference Manual

The purpose of the F2PY –Fortran to Python interface generator– is to provide a connection between Python and Fortran languages. F2PY is a part of NumPy (numpy.f2py) and also available as a standalone command line tool f2py when numpy is installed that facilitates creating/building Python C/API extension modules that make it possible

• to call Fortran 77/90/95 external subroutines and Fortran 90/95 module subroutines as well as C functions;
• to access Fortran 77 COMMON blocks and Fortran 90/95 module data, including allocatable arrays

from Python.

• Three ways to wrap - getting started
  • The quick way
  • The smart way
  • The quick and smart way
• Signature file
  • Python module block
  • Fortran/C routine signatures
  • Extensions
• Using F2PY bindings in Python
  • Scalar arguments
  • String arguments
  • Array arguments
  • Call-back arguments
  • Common blocks
  • Fortran 90 module data
• Using F2PY
  • Command f2py
  • Python module numpy.f2py
• Using via numpy.distutils
• Advanced F2PY usages
  • Adding self-written functions to F2PY generated modules
  • Modifying the dictionary of a F2PY generated module