The purpose of the F2PY – Fortran to Python interface generator – utility is to provide a connection between Python and Fortran. F2PY distributed as part of NumPy (numpy.f2py) and once installed is …

Rather than calling into a shared library via ctypes or cffi, the f2py tool can be used to to wrap Fortran interfaces in Python functions. It does this by generating a custom CPython C extension and …

f2py Examples Simple examples of using f2py to get high-speed Fortran integrated with Python easily. These examples are also useful to troubleshoot problems with f2py.

Note that in Fortran, any line that starts with a C is a comment; so the Cf2py directives are ignored by the Fortran compiler, and used only by f2py while processing the file.

Sep 26, 2025 · The f2py utility will generate automatically all of the code necessary to pass NumPy arrays in between Python and your compiled Fortran routines. In particular, it makes sure that …

This page contains a reference to all command-line options for the f2py command, as well as a reference to internal functions of the numpy.f2py module. Using f2py as a command-line tool #

Insert special f2py directives inside Fortran source for complex wrapping. Write a interface file (.pyf) to wrap Fortran files without changing them. f2py automatically generate the pyf template file that can …

One dimensional arrays are stored the same in C and Fortran. Because of this f2py allows the fortran code to operate on one dimensional vectors in place, so your fortran code will change one …

The purpose of the F2PY – Fortran to Python interface generator – utility is to provide a connection between Python and Fortran. F2PY distributed as part of NumPy (numpy.f2py) and once installed is …

A F2PY directive consists of special comment lines (starting with Cf2py or !f2py, for example) which are ignored by Fortran compilers but interpreted by F2PY as normal lines.