Improvement: Skip useless try node

personal_python_ast_optimizer/parser/skipper.py

@@ -214,6 +214,30 @@ def _should_skip_function(
             and is_overload_function(node)
         )
 
+    def visit_Try(self, node: ast.Try) -> ast.AST | list[ast.stmt] | None:
+        parsed_node = self.generic_visit(node)
+
+        if isinstance(
+            parsed_node, (ast.Try, ast.TryStar)
+        ) and self._is_useless_try_node(parsed_node):
+            return parsed_node.finalbody or None
+
+        return parsed_node
+
+    def visit_TryStar(self, node: ast.TryStar) -> ast.AST | list[ast.stmt] | None:
+        parsed_node = self.generic_visit(node)
+
+        if isinstance(
+            parsed_node, (ast.Try, ast.TryStar)
+        ) and self._is_useless_try_node(parsed_node):
+            return parsed_node.finalbody or None
+
+        return parsed_node
+
+    @staticmethod
+    def _is_useless_try_node(node: ast.Try | ast.TryStar) -> bool:
+        return all(isinstance(n, ast.Pass) for n in node.body)
+
     def visit_Attribute(self, node: ast.Attribute) -> ast.AST | None:
         if isinstance(node.value, ast.Name):
             if node.attr in self.optimizations_config.enums_to_fold.get(

tests/parser/test_exception.py

@@ -1,15 +1,48 @@
 from tests.utils import BeforeAndAfter, run_minifier_and_assert_correct
 
 
-def test_raise_same_line():
+def test_almost_useful_try():
+    before_and_after = BeforeAndAfter(
+        """
+try:
+    pass
+    pass
+except:
+    pass
+finally:
+    print(1)
+""",
+        "print(1)",
+    )
+
+    run_minifier_and_assert_correct(before_and_after)
+
+
+def test_useless_try():
     before_and_after = BeforeAndAfter(
         """
 try:
     pass
+except Exception as e:
+    pass
+finally:
+    pass
+""",
+        "",
+    )
+
+    run_minifier_and_assert_correct(before_and_after)
+
+
+def test_raise_same_line():
+    before_and_after = BeforeAndAfter(
+        """
+try:
+    a += 1
 except (Exception, ValueError) as e:
     raise ValueError('a') from e
 """,
-        "try:pass\nexcept(Exception,ValueError)as e:raise ValueError('a')from e",
+        "try:a+=1\nexcept(Exception,ValueError)as e:raise ValueError('a')from e",
     )
 
     run_minifier_and_assert_correct(before_and_after)

version.txt

@@ -1 +1 @@
-5.3.1
+5.3.2