python-chalice fails to build with Python 3.14.0a4.

There are 66 test failures with the similar traceback:

_____________________ test_can_handle_shadowed_declaration _____________________

    def test_can_handle_shadowed_declaration():
>       assert chalice_aws_calls("""\
            from chalice import Chalice
            import boto3
    
            app = Chalice(app_name='shadowed-declaration')
    
            def get_regions():
                return boto3.client('s3').list_buckets()
    
            @app.route('/')
            def index():
                return get_regions()
    
            def get_regions():
                return boto3.client('s3').head_bucket(Bucket='foo')
    
        """) == {'s3': set(['head_bucket'])}

tests/unit/test_analyzer.py:787: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
tests/unit/test_analyzer.py:21: in chalice_aws_calls
    calls = analyzer.get_client_calls_for_app(real_source_code)
chalice/analyzer.py:74: in get_client_calls_for_app
    binder = t.bind_types()
chalice/analyzer.py:683: in bind_types
    self._type_infer.bind_types()
chalice/analyzer.py:352: in bind_types
    self.visit(self._current_ast_namespace)
chalice/analyzer.py:662: in visit
    return ast.NodeVisitor.visit(self, node)
/usr/lib64/python3.14/ast.py:515: in visit
    return visitor(node)
/usr/lib64/python3.14/ast.py:523: in generic_visit
    self.visit(item)
chalice/analyzer.py:662: in visit
    return ast.NodeVisitor.visit(self, node)
/usr/lib64/python3.14/ast.py:515: in visit
    return visitor(node)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <chalice.analyzer.SymbolTableTypeInfer object at 0x7f0c43eaf4d0>
node = Assign(targets=[Name(id='app', ctx=Store())], value=Call(func=Name(id='Chalice', ctx=Load(...)), args=[], keywords=[keyword(arg='app_name', value=Constant(...))]), type_comment=None)

    def visit_Assign(self, node):
        # type: (ast.Assign) -> None
        # The LHS gets the inferred type of the RHS.
        # We do this post-traversal to let the type inference
        # run on the children first.
        self.generic_visit(node)
        rhs_inferred_type = self._get_inferred_type_for_node(node.value)
        if rhs_inferred_type is None:
            # Special casing assignment to a string literal.
>           if isinstance(node.value, ast.Str):
E           AttributeError: module 'ast' has no attribute 'Str'

According to: https://docs.python.org/dev/whatsnew/3.14.html#id2

Remove the following classes. They were all deprecated since Python 3.8, and have emitted deprecation warnings since Python 3.12:
ast.Bytes
ast.Ellipsis
ast.NameConstant
ast.Num
ast.Str

Use ast.Constant instead. As a consequence of these removals, user-defined visit_Num, visit_Str, visit_Bytes, visit_NameConstant and visit_Ellipsis methods on custom ast.NodeVisitor subclasses will no longer be called when the NodeVisitor subclass is visiting an AST. Define a visit_Constant method instead.

Also, remove the following deprecated properties on ast.Constant, which were present for compatibility with the now-removed AST classes:
ast.Constant.n
ast.Constant.s

Use ast.Constant.value instead.
(Contributed by Alex Waygood in gh-119562.)


https://docs.python.org/3.14/whatsnew/3.14.html

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.14/fedora-rawhide-x86_64/08577903-python-chalice/

For all our attempts to build python-chalice with Python 3.14, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.14/package/python-chalice/

Testing and mass rebuild of packages is happening in copr.
You can follow these instructions to test locally in mock if your package builds with Python 3.14:
https://copr.fedorainfracloud.org/coprs/g/python/python3.14/

Let us know here if you have any questions.

Python 3.14 is planned to be included in Fedora 43.
To make that update smoother, we're building Fedora packages with all pre-releases of Python 3.14.
A build failure prevents us from testing all dependent packages (transitive [Build]Requires),
so if this package is required a lot, it's important for us to get it fixed soon.

We'd appreciate help from the people who know this package best,
but if you don't want to work on this now, let us know so we can try to work around it on our side.