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An extension for IPython that help to use Fortran in your interactive session.

Project description

Latest PyPI version Number of PyPI downloads

Compile and import Fortran symbols from a code cell, using f2py.

The contents of the cell are written to a .f90 file in the directory IPYTHONDIR/fortran using a filename with the hash of the code. This file is then compiled. The resulting module is imported and all of its symbols are injected into the user’s namespace.


Martín Gaitán <>



see this notebook


You can install or upgrade via pip

pip install -U fortran-magic

or directly from the repository using the %install_ext magic command:

In[1]: %install_ext

Basic usage

Once it’s installed, you can load it with %load_ext fortranmagic. Then put your Fortran code in a cell started with the cell magic %%fortran`. For example:

In[2]: %load_ext fortranmagic

In[3]: %%fortran

       subroutine f1(x, y, z)
            real, intent(in) :: x,y
            real, intent(out) :: z

            z = sin(x+y)

       end subroutine f1

Every symbol is automatically imported. So f1 is already available:

In[4]:  f1(1.0, 2.1415)
Out[4]: 9.26574066397734e-05

See the documentation for details.


0.4.2 / 2013-10-08

  • Implement the --extra option (Thanks to Denis Vasilyev for the help)

  • Include %%fortran’s args in the hashing, so the same cell are recompiled with the same code but different arguments

0.3 / 2013-10-03

  • Added %fortran_config to set and persist default arguments for %%fortran

  • Improve documentation

0.2.1 / 2013-09-24

  • Packaged and registered in pypi

  • Starting a version’s changelog

0.2 / 2013-09-19

  • Fortran highlighting in a %%fortran cell

  • Works (or it should) in any platform (linux/windows/osx) and with py3 (thanks to Bradley Froehle)

  • Many f2py’s arguments exposed as magic arguments

  • Verbosity handling

  • Improved documentation

0.1 / 2013-09-08

  • First public release

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