style: lists for homogenous collections

Author: nedbat

coverage/debug.py

@@ -461,7 +461,7 @@ def get_one(
             else:
                 # $set_env.py: COVERAGE_DEBUG_FILE - Where to write debug output
                 file_name = os.getenv("COVERAGE_DEBUG_FILE", FORCED_DEBUG_FILE)
-                if file_name in ("stdout", "stderr"):
+                if file_name in ["stdout", "stderr"]:
                     fileobj = getattr(sys, file_name)
                 elif file_name:
                     fileobj = open(file_name, "a", encoding="utf-8")

tests/test_execfile.py

@@ -76,10 +76,10 @@ def test_no_extra_file(self) -> None:
     def test_universal_newlines(self) -> None:
         # Make sure we can read any sort of line ending.
         pylines = """# try newlines|print('Hello, world!')|""".split('|')
-        for nl in ('\n', '\r\n', '\r'):
-            with open('nl.py', 'wb') as fpy:
-                fpy.write(nl.join(pylines).encode('utf-8'))
-            run_python_file(['nl.py'])
+        for nl in ["\n", "\r\n", "\r"]:
+            with open("nl.py", "wb") as fpy:
+                fpy.write(nl.join(pylines).encode("utf-8"))
+            run_python_file(["nl.py"])
         assert self.stdout() == "Hello, world!\n"*3
 
     def test_missing_final_newline(self) -> None:

tests/test_xml.py

@@ -385,8 +385,8 @@ def package_and_class_tags(self, cov: Coverage) -> Iterator[tuple[str, dict[str,
         cov.xml_report()
         dom = ElementTree.parse("coverage.xml")
         for node in dom.iter():
-            if node.tag in ('package', 'class'):
-                yield (node.tag, {a:v for a,v in node.items() if a in ('name', 'filename')})
+            if node.tag in ["package", "class"]:
+                yield (node.tag, {a:v for a,v in node.items() if a in ["name", "filename"]})
 
     def assert_package_and_class_tags(self, cov: Coverage, result: Any) -> None:
         """Check the XML package and class tags from `cov` match `result`."""