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Add example to the documentation using multiple readers #2071

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merged 6 commits into from
Apr 4, 2022
Merged

Add example to the documentation using multiple readers #2071

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728927f
Add example using multiple readers
Mar 24, 2022
a377751
Update satpy/scene.py
adybbroe Mar 25, 2022
6bae054
Update satpy/scene.py
adybbroe Mar 25, 2022
fbf7a45
Update satpy/scene.py
adybbroe Mar 25, 2022
047b8c6
Rearrange examples so the most common comes first, and the special ca…
Apr 1, 2022
b1e4240
Fix formulation
Apr 2, 2022
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25 changes: 20 additions & 5 deletions satpy/scene.py
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright (c) 2010-2017 Satpy developers
# Copyright (c) 2010-2022 Satpy developers
#
# This file is part of satpy.
#
Expand Down Expand Up @@ -71,14 +71,29 @@ def __init__(self, filenames=None, reader=None, filter_parameters=None,
reader_kwargs=None):
"""Initialize Scene with Reader and Compositor objects.

To load data `filenames` and preferably `reader` must be specified. If `filenames` is provided without `reader`
then the available readers will be searched for a Reader that can support the provided files. This can take
a considerable amount of time so it is recommended that `reader` always be provided. Note without `filenames`
the Scene is created with no Readers available requiring Datasets to be added manually::
To load data `filenames` and preferably `reader` must be specified::

scn = Scene(filenames=glob('/path/to/viirs/sdr/files/*'), reader='viirs_sdr')


If ``filenames`` is provided without ``reader`` then the available readers
will be searched for a Reader that can support the provided files. This
can take a considerable amount of time so it is recommended that
``reader`` always be provided. Note without ``filenames`` the Scene is
created with no Readers available requiring Datasets to be added
manually::

scn = Scene()
scn['my_dataset'] = Dataset(my_data_array, **my_info)

Further, notice that it is also possible to load a combination of files
or sets of files each requiring their specific reader. For that
``filenames`` needs to be a `dict` (see parameters list below), e.g.::

scn = Scene(filenames={'nwcsaf-pps_nc': glob('/path/to/nwc/saf/pps/files/*'),
'modis_l1b': glob('/path/to/modis/lvl1/files/*')})


Args:
filenames (iterable or dict): A sequence of files that will be used to load data from. A ``dict`` object
should map reader names to a list of filenames for that reader.
Expand Down