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Table of Contents

Name

f2py - Fortran to Python interface generator

Synopsis

(1) To construct extension module sources:

f2py [<options>] <fortran files> [[[only:]||[skip:]] <fortran functions> ] [: <fortran files> ...]

(2) To compile fortran files and build extension modules:

f2py -c [<options>, <config_fc options>, <extra options>] <fortran files>

(3) To generate signature files:

f2py -h <filename.pyf> ...< same options as in (1) >

This program generates a Python C/API file (<modulename>module.c) that contains wrappers for given Fortran or C functions so that they can be called from Python. With the -c option the corresponding extension modules are built.

Options

-h <filename>: Write signatures of the fortran routines to file <filename> and exit. You can then edit <filename> and use it instead of <fortran files>. If <filename>==stdout then the signatures are printed to stdout.
<fortran functions>: Names of fortran routines for which Python C/API functions will be generated. Default is all that are found in <fortran files>.
skip:: Ignore fortran functions that follow until ‘:’.
only:: Use only fortran functions that follow until ‘:’.
:: Get back to <fortran files> mode.
-m <modulename>: Name of the module; f2py generates a Python/C API file <modulename>module.c or extension module <modulename>. Default is ’untitled’.
--[no-]lower: Do [not] lower the cases in <fortran files>. By default, --lower is assumed with -h key, and --no-lower without -h key.
--build-dir <dirname>: All f2py generated files are created in <dirname>. Default is tempfile.mktemp().
--overwrite-signature: Overwrite existing signature file.
--[no-]latex-doc: Create (or not) <modulename>module.tex. Default is --no-latex-doc.
--short-latex: Create ’incomplete’ LaTeX document (without commands \documentclass, \tableofcontents, and \begin{document}, \end{document}).
--[no-]rest-doc: Create (or not) <modulename>module.rst. Default is --no-rest-doc.
--debug-capi: Create C/API code that reports the state of the wrappers during runtime. Useful for debugging.
-include’<includefile>’: Add CPP #include statement to the C/API code. <includefile> should be in the format of either ‘"filename.ext"’ or ‘<filename.ext>’. As a result <includefile> will be included just before wrapper functions part in the C/API code. The option is depreciated, use ‘usercode‘ statement in signature files instead.
--[no-]wrap-functions: Create Fortran subroutine wrappers to Fortran 77 functions. --wrap-functions is default because it ensures maximum portability/compiler independence.
--help-link [..]: List system resources found by system_info.py. [..] may contain a list of resources names. See also --link-<resource> switch below.
--quiet: Run quietly.
--verbose: Run with extra verbosity.
-v: Print f2py version ID and exit.
--include_paths path1:path2:...: Search include files (that f2py will scan) from the given directories.

Config_fc Options

The following options are effective only when -c switch is used.

--help-compiler: List available Fortran compilers [DEPRECIATED].
--fcompiler=<name>: Specify Fortran compiler type by vendor.
--compiler=<name>: Specify C compiler type (as defined by distutils)
--fcompiler-exec=<path>: Specify the path to F77 compiler [DEPRECIATED].
--f90compiler-exec=<path>: Specify the path to F90 compiler [DEPRECIATED].
--help-fcompiler: List available Fortran compilers and exit.
--f77exec=<path>: Specify the path to F77 compiler.
--f90exec=<path>: Specify the path to F90 compiler.
--f77flags="...": Specify F77 compiler flags.
--f90flags="...": Specify F90 compiler flags.
--opt="...": Specify optimization flags.
--arch="...": Specify architecture specific optimization flags.
--noopt: Compile without optimization.
--noarch: Compile without arch-dependent optimization.
--debug: Compile with debugging information.

Extra Options

The following options are effective only when -c switch is used.

--link-<resource>: Link extension module with <resource> as defined by numpy_distutils/system_info.py. E.g. to link with optimized LAPACK libraries (vecLib on MacOSX, ATLAS elsewhere), use --link-lapack_opt. See also --help-link switch.
-L/path/to/lib/ -l<libname>
-D<define> -U<name> -I/path/to/include/
<filename>.o <filename>.so <filename>.a
-DPREPEND_FORTRAN -DNO_APPEND_FORTRAN -DUPPERCASE_FORTRAN -DUNDERSCORE_G77: Macros that might be required with non-gcc Fortran compilers.
-DF2PY_REPORT_ATEXIT: To print out a performance report of F2PY interface when python exits. Available for Linux.
-DF2PY_REPORT_ON_ARRAY_COPY=<int>: To send a message to stderr whenever F2PY interface makes a copy of an array. Integer <int> sets the threshold for array sizes when a message should be shown.