old_contents: """Facility to load plugins."""
  
  import sys
  import os
  
  from importlib import import_module
  
  
  class StraightPluginLoader(object):
      """Performs the work of locating and loading straight plugins.
      
      This looks for plugins in every location in the import path.
      """
  
      def _findPluginFilePaths(self, namespace):
          already_seen = set()
  
          # Look in each location in the path
          for path in sys.path:
  
              # Within this, we want to look for a package for the namespace
              namespace_rel_path = namespace.replace(".", os.path.sep)
              namespace_path = os.path.join(path, namespace_rel_path)
              if os.path.exists(namespace_path):
                  for possible in os.listdir(namespace_path):
                      base, ext = os.path.splitext(possible)
                      if base == '__init__' or ext != '.py':
                          continue
                      if base not in already_seen:
                          already_seen.add(base)
                          yield os.path.join(namespace, possible)
  
      def _findPluginModules(self, namespace):
          for filepath in self._findPluginFilePaths(namespace):
              path_segments = list(filepath.split(os.path.sep))
              path_segments = [p for p in path_segments if p]
              path_segments[-1] = os.path.splitext(path_segments[-1])[0]
              import_path = '.'.join(path_segments)
              yield import_module(import_path)
  
      def load(self, namespace):
          modules = self._findPluginModules(namespace)
  
          return list(modules)
  
new_contents: """Facility to load plugins."""
  
  import sys
  import os
  
  from importlib import import_module
  
  
  class StraightPluginLoader(object):
      """Performs the work of locating and loading straight plugins.
      
      This looks for plugins in every location in the import path.
      """
  
      def _findPluginFilePaths(self, namespace):
          already_seen = set()
  
          # Look in each location in the path
          for path in sys.path:
  
              # Within this, we want to look for a package for the namespace
              namespace_rel_path = namespace.replace(".", os.path.sep)
              namespace_path = os.path.join(path, namespace_rel_path)
              if os.path.exists(namespace_path):
                  for possible in os.listdir(namespace_path):
                      base, ext = os.path.splitext(possible)
                      if base == '__init__' or ext != '.py':
                          continue
                      if base not in already_seen:
                          already_seen.add(base)
                          yield os.path.join(namespace, possible)
  
      def _findPluginModules(self, namespace):
          for filepath in self._findPluginFilePaths(namespace):
              path_segments = list(filepath.split(os.path.sep))
              path_segments = [p for p in path_segments if p]
              path_segments[-1] = os.path.splitext(path_segments[-1])[0]
              import_path = '.'.join(path_segments)
              yield import_module(import_path)
  
      def load(self, namespace):
          """Load all modules found in a namespace"""
  
          modules = self._findPluginModules(namespace)
  
          return list(modules)
  
subject: Add docstring to load() method