old_contents: import sys
  import os
  import imp
  from importlib import abc
  
  from semantix import readers
  
  class YamlImporter(abc.Finder, abc.Loader):
      def __init__(self, *args, **kwargs):
          super().__init__(*args, **kwargs)
          self.module_file_map = dict()
  
      def _locate_module_file(self, fullname):
          file = fullname.replace('.', '/') + '.yml'
          for path in sys.path:
              test = os.path.join(path, file)
              if os.path.exists(test):
                  return test
  
      def find_module(self, fullname, path=None):
          if path:
              filename = self._locate_module_file(fullname)
              if filename:
                  self.module_file_map[fullname] = filename
                  return self
  
      def load_module(self, fullname):
          if fullname in sys.modules:
              return sys.modules[fullname]
  
          new_mod = imp.new_module(fullname)
          sys.modules[fullname] = new_mod
  
          try:
              dct = readers.read(self.module_file_map[fullname])
          except Exception as error:
              raise ImportError('unable to import "%s"' % fullname)
  
          for key in dct:
              setattr(new_mod, key, dct[key])
  
          return new_mod
new_contents: import sys
  import os
  import imp
  from importlib import abc
  
  from semantix import readers
  
  class YamlImporter(abc.Finder, abc.Loader):
      def __init__(self, *args, **kwargs):
          super().__init__(*args, **kwargs)
          self.module_file_map = dict()
  
      def _locate_module_file(self, fullname):
          file = fullname.replace('.', '/') + '.yml'
          for path in sys.path:
              test = os.path.join(path, file)
              if os.path.exists(test):
                  return test
  
      def find_module(self, fullname, path=None):
          if path:
              filename = self._locate_module_file(fullname)
              if filename:
                  self.module_file_map[fullname] = filename
                  return self
  
      def load_module(self, fullname):
          if fullname in sys.modules:
              return sys.modules[fullname]
  
          filename = self.module_file_map[fullname]
  
          new_mod = imp.new_module(fullname)
          setattr(new_mod, '__file__', filename)
          sys.modules[fullname] = new_mod
  
          try:
              dct = readers.read(filename)
          except Exception as error:
              raise ImportError('unable to import "%s"' % fullname)
  
          for key in dct:
              setattr(new_mod, key, dct[key])
  
          return new_mod
  
subject: Set the __file__ property for yaml modules