text: from dataclasses import dataclass
  import os
  
  path_base_default = os.getenv('ASTRO_IMAGING_DATA_PATH', default='./')
  
  
  @dataclass
  class Paths:
      base: str = path_base_default
      catalogs: str = None
      images: str = None
  
      def __post_init__(self):
          if self.catalogs is None:
              self.catalogs = os.path.join(self.base, 'catalogs')
          if self.images is None:
              self.images = os.path.join(self.base, 'images')
  
  
  paths_default = Paths()
  