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.. _restart_files:
=============
Restart files
=============
Writing restart files
=====================
Use ``calc.write('xyz.gpw')`` or ``calc.write('xyz.gpw', mode='all')``
to include also the wave functions.
You can register an automatic call to the ``write`` method, every
``n``'th iteration like this::
calc.attach(calc.write, n, 'xyz.gpw')
or::
calc.attach(calc.write, n, 'xyz.gpw', mode='all')
Reading restart files
=====================
The calculation can be read from file like this::
calc = GPAW('xyz.gpw')
or this::
atoms, calc = restart('xyz.gpw')
By adding the option txt=None you can suppress text output when restarting
(e.g. when plotting a DOS)::
atoms, calc = restart('xyz.gpw', txt=None)
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