Rely on importlib_metadata 3.6 for nicer protocol.

changelog/732.feature.rst

@@ -0,0 +1 @@
+Rely on importlib_metadata 3.6 for nicer entry point processing.

setup.cfg

@@ -40,7 +40,7 @@ install_requires=
     requests-toolbelt >= 0.8.0, != 0.9.0
     setuptools >= 0.7.0
     tqdm >= 4.14
-    importlib_metadata; python_version < "3.8"
+    importlib_metadata >= 3.6
     keyring >= 15.1
     rfc3986 >= 1.4.0
     colorama >= 0.4.3

twine/cli.py

@@ -12,8 +12,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 import argparse
-from typing import Any, Dict, List, Tuple
+from typing import Any, List, Tuple
 
+import importlib_metadata
 import pkginfo
 import requests
 import requests_toolbelt
@@ -22,19 +23,10 @@
 
 import twine
 from twine import _installed
-from twine import importlib_metadata
 
 args = argparse.Namespace()
 
 
-def _registered_commands(
-    group: str = "twine.registered_commands",
-) -> Dict[str, importlib_metadata.EntryPoint]:
-    # todo: with python/importlib_metadata#278:
-    # return importlib_metadata.entry_points()[group]
-    return {ep.name: ep for ep in importlib_metadata.entry_points()[group]}
-
-
 def list_dependencies_and_versions() -> List[Tuple[str, str]]:
     return [
         ("pkginfo", _installed.Installed(pkginfo).version),
@@ -52,7 +44,8 @@ def dep_versions() -> str:
 
 
 def dispatch(argv: List[str]) -> Any:
-    registered_commands = _registered_commands()
+    registered_commands = importlib_metadata.entry_points(
+        group='twine.registered_commands')
     parser = argparse.ArgumentParser(prog="twine")
     parser.add_argument(
         "--version",
@@ -68,7 +61,7 @@ def dispatch(argv: List[str]) -> Any:
     )
     parser.add_argument(
         "command",
-        choices=registered_commands.keys(),
+        choices=registered_commands.names,
     )
     parser.add_argument(
         "args",