def visit_TryFinally(self, n):
if len(n.body) == 1 and isinstance(n.body[0], ast27.TryExcept):
new = self.visit(n.body[0])
new.finalbody = self.visit(n.finalbody)
return new
else:
return ast3.Try(self.visit(n.body), [], [], self.visit(n.finalbody))
def _emulate_yield_from(self, targets: Optional[List[ast.Name]],
node: ast.YieldFrom) -> Iterable[ast.AST]:
generator = ast.Name(
id='_py_backwards_generator_{}'.format(self._name_suffix))
exception = ast.Name(
id='_py_backwards_generator_exception_{}'.format(self._name_suffix))
yield ast.Assign(targets=[generator],
value=ast.Call(func=ast.Name(id='iter'),
args=[node.value],
keywords=[]))
assign_to_targets = [
ast.If(test=ast.Call(func=ast.Name(id='hasattr'), args=[
exception, ast.Str(s='value'),
], keywords=[]), body=[
ast.Assign(targets=targets,
value=ast.Attribute(
value=exception, attr='value')),
], orelse=[]),
ast.Break()] if targets else [ast.Break()]
yield ast.While(test=ast.NameConstant(value=True), body=[
ast.Try(body=[
ast.Expr(value=ast.Yield(value=ast.Call(
func=ast.Name(id='next'),
args=[generator], keywords=[]))),
], handlers=[
ast.ExceptHandler(
type=ast.Name(id='StopIteration'),
name=exception.id,
body=assign_to_targets),
], orelse=[], finalbody=[]),
], orelse=[])
self._name_suffix += 1
def visit_TryExcept(self, n):
return ast3.Try(
self.visit(n.body), self.visit(n.handlers), self.visit(n.orelse), []
)