@macro ezfio
{@acronym{EZFIO} }
@end macro

@section Preparing the @ezfio file

The @exe program uses the @ezfio (Easy Fortran Input/Output) library
generator@footnote{@url{http://ezfio.sourceforge.net}} to handle data persistence.
An @ezfio ``file'' is a directory which contains all the needed input/output data
needed by the code. These files are accessible via a simple @acronym{API} both
in Fortran and Python.

The output file containing the computed wave function has to be transformed
into an @ezfio file in order to be used by @exe. This step is realized by
calling the @command{to_ezfio.py} Python script followed by the name of the
file containing the wave function:
@example
to_ezfio.py test.out
@end example
An @ezfio file is produced, named @file{test.out.ezfio}.