code: def clear_cache(datasets=None):
      """
      Cleans the scipy datasets cache directory.
  
      If a scipy.datasets method or a list/tuple of the same is
      provided, then clear_cache removes all the data files
      associated to the passed dataset method callable(s).
  
      By default, it removes all the cached data files.
  
      Parameters
      ----------
      datasets : callable or list/tuple of callable or None
  
      Examples
      --------
      >>> from scipy import datasets
      >>> ascent_array = datasets.ascent()
      >>> ascent_array.shape
      (512, 512)
      >>> datasets.clear_cache([datasets.ascent])
      Cleaning the file ascent.dat for dataset ascent
      """
      _clear_cache(datasets)
  
imports: import os
  import shutil
  from ._registry import method_files_map
label_desc: Use image node_id 2 for calling a global function with example usage: clear_cache(datasets) without return types