CallbackSaveToDisk

class odl.solvers.util.callback.CallbackSaveToDisk(saveto, step=1, impl='pickle', **kwargs)

Bases: Callback

Callback for saving iterates to disk.

Methods

__call__(x)	Save the current iterate.
reset()	Set iter to 0.

__init__(saveto, step=1, impl='pickle', **kwargs)

Initialize a new instance.

Parameters:

savetostring

Format string for the name of the file(s) where iterates are saved. The file name is generated as

filename = saveto.format(cur_iter_num)

where cur_iter_num is the current iteration number.

steppositive int, optional

Number of iterations between saves.

impl{'pickle', 'numpy', 'numpy_txt'}, optional

The format to store the iterates in. Numpy formats are only usable if the data can be converted to an array via numpy.asarray.

Other Parameters:

kwargs

Optional arguments passed to the save function.

Examples

Store each iterate:

>>> callback = CallbackSaveToDisk('my_path/my_iterate')

Save every fifth overwriting the previous one:

>>> callback = CallbackSaveToDisk(saveto='my_path/my_iterate',
...                               step=5)

Save each fifth iterate in numpy format, indexing the files with the iteration number:

>>> callback = CallbackSaveToDisk(saveto='my_path/my_iterate_{}',
...                               step=5, impl='numpy')