py21cmfast.io.caching.OutputCache
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.. py:class:: py21cmfast.io.caching.OutputCache

   
   An object that manages cache files from 21cmFAST simulations.

   This object has a single attribute -- the top-level directory of the cache. This
   directory can be anywhere on disk. A number of methods exist on the object to
   interact with the cache, including finding existing cache files for a particular
   OutputStruct, writing/reading an OutputStruct to/from the cache, and listing
   existing datasets.

   The cache is meant for single-field OutputStruct objects, not "collections" of
   outputs in an evolved universe (like Coeval or Lightcone objects).















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   .. py:method:: find_existing(obj)

      
      Try to find existing boxes which match the parameters of this instance.

      :Parameters: **obj** (*OutputStruct*) -- The OutputStruct instance to search for.

      :returns: *Path* -- The path to an existing cached OutputStruct matching this instance, or
                None if no match is found.















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   .. py:method:: get_filename(obj)

      
      Generate a filename for a given OutputStruct object based on its properties.

      This method constructs a unique filename using the object's class name, redshift
      (if available), and hashes of its input parameters. The filename structure is
      determined by the _path_structures dictionary.

      :Parameters: **obj** (*OutputStruct*) -- The OutputStruct object for which to generate a filename.

      :returns: *str* -- The generated filename for the given OutputStruct object.















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   .. py:method:: get_path(obj)

      
      Get the full path for a given OutputStruct object.

      This method combines the cache directory with the filename generated
      for the given OutputStruct object to create a complete file path.

      :Parameters: **obj** (*OutputStruct*) -- The OutputStruct object for which to generate the full path.

      :returns: *Path* -- The complete file path for the given OutputStruct object.















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   .. py:method:: list_datasets(*, kind = None, inputs = None, all_seeds = True, redshift = None)

      
      Return all datasets in the cache which match a given set of filters.

      :Parameters: * **kind** (*str, optional*) -- Filter by this kind (a class name of an OutputStruct).
                   * **inputs** (*InputParameters*) -- Filter by these input parameters
                   * **all_seeds** -- Set to False to only include the seed within `inputs`.
                   * **redshift** -- The redshift to search for.

      :returns: *files* -- list of paths pointing to files matching the filters.















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   .. py:method:: load(obj)

      
      Load a cache-backed object from disk corresponding to a given object.
















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   .. py:method:: write(obj)

      
      Write an OutputStruct object to the cache.

      This method writes the given OutputStruct object to an HDF5 file in the cache,
      using the path determined by the object's properties.

      :Parameters: **obj** (*OutputStruct*) -- The OutputStruct object to be written to the cache.















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   .. py:attribute:: direc
      :type:  pathlib.Path