pythran fails to build with Python 3.13.0b1.

_ TestNumpyUFuncUnary.test_numpy_ufunc_unary_numpy_ufunc_unary_numpy_signbit_scalar_float _
[gw0] linux -- Python 3.13.0 /usr/bin/python3

self = <pythran.tests.test_numpy_ufunc_unary.TestNumpyUFuncUnary testMethod=test_numpy_ufunc_unary_numpy_ufunc_unary_numpy_signbit_scalar_float>

>   import sys;exec(eval(sys.stdin.readline()))

<string>:1: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
pythran/tests/__init__.py:327: in run_test
    self.assertAlmostEqual(python_ref, pythran_res)
pythran/tests/__init__.py:117: in assertAlmostEqual
    self.check_type(ref, res)
pythran/tests/__init__.py:101: in check_type
    self.assertIsInstance(res, (bool, bool_))
E   AssertionError: 0.0 is not an instance of (<class 'bool'>, <class 'numpy.bool_'>)
----------------------------- Captured stdout call -----------------------------
Python result:  False
Pythran result:  0.0
Type of Pythran res :  <class 'float'>
Type of Python ref :  <class 'numpy.bool_'>
----------------------------- Captured stderr call -----------------------------
INFO: Generated module: test_numpy_ufunc_unary_numpy_signbit_scalar_float
INFO: Output: /builddir/build/BUILD/pythran-0.14.0/test_numpy_ufunc_unary_numpy_signbit_scalar_float.cpython-313-x86_64-linux-gnu.so
__________________________ TestDoctest.test_tutorial ___________________________
[gw0] linux -- Python 3.13.0 /usr/bin/python3

self = <pythran.tests.test_xdoc.TestDoctest testMethod=test_tutorial>

    @pytest.mark.skipif(sys.platform == "win32",
                        reason="We should create a file for windows.")
    def test_tutorial(self):
        failed, _ = doctest.testfile('../../docs/TUTORIAL.rst')
>       self.assertEqual(failed, 0)
E       AssertionError: 4 != 0

pythran/tests/test_xdoc.py:25: AssertionError
----------------------------- Captured stdout call -----------------------------
**********************************************************************
File "/builddir/build/BUILD/pythran-0.14.0/pythran/tests/../../docs/TUTORIAL.rst", line 22, in TUTORIAL.rst
Failed example:
    print(ast.dump(tree))  # view it as a string
Expected:
    Module(body=[Assign(targets=[Name(id='a', ctx=Store(), annotation=None, type_comment=None)], value=Constant(value=1, kind=None), type_comment=None)], type_ignores=[])
Got:
    Module(body=[Assign(targets=[Name(id='a', ctx=Store())], value=Constant(value=1))])
**********************************************************************
File "/builddir/build/BUILD/pythran-0.14.0/pythran/tests/../../docs/TUTORIAL.rst", line 35, in TUTORIAL.rst
Failed example:
    print(ast.dump(tree))
Expected:
    Module(body=[FunctionDef(name='fib', args=arguments(args=[Name(id='n', ctx=Param(), annotation=None, type_comment=None)], posonlyargs=[], vararg=None, kwonlyargs=[], kw_defaults=[], kwarg=None, defaults=[]), body=[Return(value=IfExp(test=Compare(left=Name(id='n', ctx=Load(), annotation=None, type_comment=None), ops=[Lt()], comparators=[Constant(value=2, kind=None)]), body=Name(id='n', ctx=Load(), annotation=None, type_comment=None), orelse=BinOp(left=Call(func=Name(id='fib', ctx=Load(), annotation=None, type_comment=None), args=[BinOp(left=Name(id='n', ctx=Load(), annotation=None, type_comment=None), op=Sub(), right=Constant(value=1, kind=None))], keywords=[]), op=Add(), right=Call(func=Name(id='fib', ctx=Load(), annotation=None, type_comment=None), args=[BinOp(left=Name(id='n', ctx=Load(), annotation=None, type_comment=None), op=Sub(), right=Constant(value=2, kind=None))], keywords=[]))))], decorator_list=[], returns=None, type_comment=None)], type_ignores=[])
Got:
    Module(body=[FunctionDef(name='fib', args=arguments(args=[Name(id='n', ctx=Param())]), body=[Return(value=IfExp(test=Compare(left=Name(id='n', ctx=Load()), ops=[Lt()], comparators=[Constant(value=2)]), body=Name(id='n', ctx=Load()), orelse=BinOp(left=Call(func=Name(id='fib', ctx=Load()), args=[BinOp(left=Name(id='n', ctx=Load()), op=Sub(), right=Constant(value=1))]), op=Add(), right=Call(func=Name(id='fib', ctx=Load()), args=[BinOp(left=Name(id='n', ctx=Load()), op=Sub(), right=Constant(value=2))]))))])])
**********************************************************************
File "/builddir/build/BUILD/pythran-0.14.0/pythran/tests/../../docs/TUTORIAL.rst", line 201, in TUTORIAL.rst
Failed example:
    sorted(map(ast.dump, ce))
Expected:
    ["Attribute(value=Name(id='math', ctx=Load(), annotation=None, type_comment=None), attr='cos', ctx=Load())", 'Constant(value=3, kind=None)']
Got:
    ["Attribute(value=Name(id='math', ctx=Load()), attr='cos', ctx=Load())", 'Constant(value=3)']
**********************************************************************
File "/builddir/build/BUILD/pythran-0.14.0/pythran/tests/../../docs/TUTORIAL.rst", line 212, in TUTORIAL.rst
Failed example:
    print(ast.dump(returned))
Expected:
    Name(id='b', ctx=Load(), annotation=None, type_comment=None)
Got:
    Name(id='b', ctx=Load())
**********************************************************************
1 item had failures:
   4 of  79 in TUTORIAL.rst
***Test Failed*** 4 failures.
____________________________ TestDoctest.test_utils ____________________________
[gw0] linux -- Python 3.13.0 /usr/bin/python3

self = <pythran.tests.test_xdoc.TestDoctest testMethod=test_utils>

>   lambda self: generic_test_package(self, module))

pythran/tests/test_xdoc.py:89: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
pythran/tests/test_xdoc.py:83: in generic_test_package
    self.assertEqual(failed, 0)
E   AssertionError: 1 != 0
----------------------------- Captured stdout call -----------------------------
**********************************************************************
File "/builddir/build/BUILD/pythran-0.14.0/pythran/utils.py", line 108, in pythran.utils.get_variable
Failed example:
    ast.dump(get_variable(ref))
Expected:
    "Name(id='a', ctx=Load(), annotation=None, type_comment=None)"
Got:
    "Name(id='a', ctx=Load())"
**********************************************************************
1 item had failures:
   1 of   3 in pythran.utils.get_variable
***Test Failed*** 1 failure.


https://docs.python.org/3.13/whatsnew/3.13.html

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.13/fedora-rawhide-x86_64/07449638-pythran/

For all our attempts to build pythran with Python 3.13, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.13/package/pythran/

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 3.13:
https://copr.fedorainfracloud.org/coprs/g/python/python3.13/

Let us know here if you have any questions.

Python 3.13 is planned to be included in Fedora 41.
To make that update smoother, we're building Fedora packages with all pre-releases of Python 3.13.
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.