Extract method for 'is_pypi' to consolidate repeated behavior and doc…

…umentation.

twine/auth.py

@@ -31,11 +31,8 @@ def choose(cls, interactive: bool) -> Type["Resolver"]:
     @property
     @functools.lru_cache()
     def username(self) -> Optional[str]:
-        if cast(str, self.config["repository"]).startswith(
-            (utils.DEFAULT_REPOSITORY, utils.TEST_REPOSITORY)
-        ):
-            # As of 2024-01-01, PyPI requires API tokens for uploads, meaning
-            # that the username is invariant.
+        if self.is_pypi():
+            # Username is invariant.
             return "__token__"
 
         return utils.get_userpass_value(
@@ -97,20 +94,23 @@ def password_from_keyring_or_prompt(self) -> str:
             logger.info("password set from keyring")
             return password
 
-        # As of 2024-01-01, PyPI requires API tokens for uploads;
-        # specialize the prompt to clarify that an API token must be provided.
-        if cast(str, self.config["repository"]).startswith(
-            (utils.DEFAULT_REPOSITORY, utils.TEST_REPOSITORY)
-        ):
-            prompt = "API token"
-        else:
-            prompt = "password"
+        # Prompt for API token when required.
+        what = "API token" if self.is_pypi() else "password"
 
-        return self.prompt(prompt, getpass.getpass)
+        return self.prompt(what, getpass.getpass)
 
     def prompt(self, what: str, how: Callable[..., str]) -> str:
         return how(f"Enter your {what}: ")
 
+    def is_pypi(self) -> bool:
+        """
+        As of 2024-01-01, PyPI requires API tokens for uploads.
+        """
+        return cast(str, self.config["repository"]).startswith((
+            utils.DEFAULT_REPOSITORY,
+            utils.TEST_REPOSITORY,
+        ))
+
 
 class Private(Resolver):
     def prompt(self, what: str, how: Optional[Callable[..., str]] = None) -> str: