| import sys | |
| from functools import partial | |
| def find_entrypoints(group_name: str): | |
| """ | |
| Find entrypoints of a given group using either `importlib.metadata` or the | |
| older `pkg_resources` mechanism. | |
| Yields tuples of the entrypoint name and a callable function that will | |
| load the actual entrypoint. | |
| """ | |
| if sys.version_info >= (3, 10): | |
| # "Changed in version 3.10: importlib.metadata is no longer provisional." | |
| try: | |
| from importlib.metadata import entry_points | |
| except ImportError: | |
| pass | |
| else: | |
| eps = entry_points(group=group_name) | |
| # Only do this if this implementation of `importlib.metadata` is | |
| # modern enough to not return a dict. | |
| if not isinstance(eps, dict): | |
| for entry_point in eps: | |
| yield (entry_point.name, entry_point.load) | |
| return | |
| try: | |
| from pkg_resources import working_set | |
| except ImportError: | |
| pass | |
| else: | |
| for entry_point in working_set.iter_entry_points(group_name): | |
| yield (entry_point.name, partial(entry_point.load, require=True)) | |