Fix some lints and add some comments

piptools/scripts/compile.py

@@ -5,7 +5,7 @@
 import shlex
 import sys
 import tempfile
-from typing import IO, Any, BinaryIO, List, Optional, Set, Tuple, Union, cast
+from typing import IO, Any, BinaryIO, cast
 
 import click
 import pep517

tests/test_cli_compile.py

@@ -2497,52 +2497,65 @@ def test_all_extras_fail_with_extra(fake_dists, runner, make_module, fname, cont
 
 
 def _actual_deps(keys: Iterable[str], text: str) -> dict[str, str | None]:
-    result = {k: None for k in keys}
+    # TODO: Consider making it possible to compare the actual- and expected-deps
+    #  without adding a bunch of None in the actual deps.
+    result: dict[str, str | None] = {k: None for k in keys}
+
     for line in text.splitlines():
         if line.startswith("#"):
             continue
         try:
             k, v = line.split("==")
-        except ValueError as e:
+        except ValueError:
             continue
         result[k] = v
 
+    print(result)
     return result
 
 
 class Version:
     def __init__(self, expected: str | None) -> None:
         self._pat = expected
 
-    def __eq__(self, other: str | None) -> bool:
+    def __eq__(self, other: object) -> bool:
         if None in {self._pat, other}:
             return self._pat is other
+
+        if not isinstance(other, str):
+            return False
+
         return fnmatch.fnmatch(other, self._pat)
 
     def __repr__(self) -> str:
         return f"<{self.__class__.__name__}@{id(self)}(_pat={self._pat!r})>"
 
 
+# TODO: Consider isolating test results from PyPi
 METADATA_TEST_CASE_BUILD_DEPS = {
     "flit": {
         "flit-core": Version("*"),
         "poetry-core": Version(None),
         "setuptools": Version(None),
+        "wheel": Version(None),
     },
     "poetry": {
         "flit-core": Version(None),
         "poetry-core": Version("*"),
         "setuptools": Version(None),
+        "wheel": Version(None),
     },
     "setup.cfg": {
         "flit-core": Version(None),
         "poetry-core": Version(None),
         "setuptools": Version("*"),
+        "wheel": Version(None),
     },
     "setup.py": {
         "flit-core": Version(None),
         "poetry-core": Version(None),
         "setuptools": Version("*"),
+        "wheel": Version("*"),
     },
 }
 
@@ -2586,6 +2599,7 @@ def test_build_system_requires(
     expected_deps.update(build_deps)
 
     actual_deps = _actual_deps(expected_deps.keys(), out.stderr)
+    # Compare as dicts to see all differences in pytest output
     assert actual_deps == expected_deps