old_contents: """
  Definition of sources factory.
  
  Automatic import of any source.Source subclass,
  in any subpackage with name beginning with 'source_'
  
  """
  import importlib
  import glob
  import os
  
  from .info    import PACKAGE_NAME, PACKAGE_VERSION
  from .default import SUBMODULES_SOURCES_PREFIX
  from .source  import Source
  
  # from .source_tourinsoft import SourceTourinsoft
  from .source_weather import SourceWeather
  from .source_wkpd import WikiSource
  
  
  def all_sources():
      return (
          # SourceTourinsoft(),
          # SourceWeather(),
          # WikiSource(),
      )
  
  # def source_class_check(cls):
      # """Return True iff given cls is a valid source class"""
      # return (
          # issubclass(cls.__class__, type) and  # its a class
          # issubclass(cls, Source) and  # its a source
          # cls is not Source  # but not Source itself
      # )
  
  
  # def import_classes(module_names, class_check=source_class_check):
      # """Yields all Source subclasses found in package directory"""
      # for module_name in module_names:
          # print('MODULE NAME:', module_name)
          # module = importlib.import_module(module_name, package=PACKAGE_NAME)
          # print('MODULE:', module)
          # attributes = (module.__getattribute__(_) for _ in module.__dir__())
          # yield from (attr for attr in attributes if class_check(attr))
  
  
  # def list_submodules(prefix=SUBMODULES_SOURCES_PREFIX):
      # """Return generator of plugin names that are detected and importables."""
      # return (f[:-3].replace('/', '.')
              # for f in glob.glob(PACKAGE_NAME + '/*.py')
              # if not f.startswith('_')
             # )
  
  
  # print('###########################################')
  # submods = tuple(list_submodules())
  # print('SUBMODS:', submods)
  # classes = tuple(import_classes(submods))
  # print('FOUND CLASSES:', classes)
  
  
  # print('###########################################')
  
new_contents: """
  Definition of sources factory.
  
  Automatic import of any source.Source subclass,
  in any subpackage with name beginning with 'source_'
  
  """
  import importlib
  import glob
  import os
  
  from .info    import PACKAGE_NAME, PACKAGE_VERSION
  from .default import SUBMODULES_SOURCES_PREFIX
  from .source  import Source
  
  # from .source_tourinsoft import SourceTourinsoft
  from .source_weather import SourceWeather
  # from .source_wkpd import WikiSource
  
  
  def all_sources():
      return (
          # SourceTourinsoft(),
          # SourceWeather(),
          # WikiSource(),
      )
  
  # def source_class_check(cls):
      # """Return True iff given cls is a valid source class"""
      # return (
          # issubclass(cls.__class__, type) and  # its a class
          # issubclass(cls, Source) and  # its a source
          # cls is not Source  # but not Source itself
      # )
  
  
  # def import_classes(module_names, class_check=source_class_check):
      # """Yields all Source subclasses found in package directory"""
      # for module_name in module_names:
          # print('MODULE NAME:', module_name)
          # module = importlib.import_module(module_name, package=PACKAGE_NAME)
          # print('MODULE:', module)
          # attributes = (module.__getattribute__(_) for _ in module.__dir__())
          # yield from (attr for attr in attributes if class_check(attr))
  
  
  # def list_submodules(prefix=SUBMODULES_SOURCES_PREFIX):
      # """Return generator of plugin names that are detected and importables."""
      # return (f[:-3].replace('/', '.')
              # for f in glob.glob(PACKAGE_NAME + '/*.py')
              # if not f.startswith('_')
             # )
  
  
  # print('###########################################')
  # submods = tuple(list_submodules())
  # print('SUBMODS:', submods)
  # classes = tuple(import_classes(submods))
  # print('FOUND CLASSES:', classes)
  
  
  # print('###########################################')
  
subject: fix typo