Exception in Tkinter callback
Traceback (most recent call last):
File "/usr/lib/python3.14/tkinter/__init__.py", line 2114, in __call__
return self.func(*args)
~~~~~~~~~^^^^^^^
File "/usr/lib/python3.14/tkinter/__init__.py", line 885, in callit
func(*args, **kw)
~~~~^^^^^^^^^^^^^
File "/opt/mrpython/PyInterpreter.py", line 91, in run_loop
ok, report = interp.execute()
~~~~~~~~~~~~~~^^
File "/opt/mrpython/PyInterpreter.py", line 159, in execute
ok = runner.execute(self.locals)
File "/opt/mrpython/StudentRunner.py", line 107, in execute
if not self.check_rules(self.report):
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
File "/opt/mrpython/StudentRunner.py", line 244, in check_rules
if not self.check_types():
~~~~~~~~~~~~~~~~^^
File "/opt/mrpython/StudentRunner.py", line 289, in check_types
type_ctx = typecheck_from_ast(self.AST, self.filename, self.source)
File "/opt/mrpython/typechecking/typechecker.py", line 3461, in typecheck_from_ast
prog.build_from_ast(ast, filename, source)
~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/mrpython/typechecking/prog_ast.py", line 101, in build_from_ast
fun_ast = FunctionDef(node)
File "/opt/mrpython/typechecking/prog_ast.py", line 188, in __init__
if isinstance(first_instr, ast.Expr) and isinstance(first_instr.value, ast.Str):
^^^^^^^
AttributeError: module 'ast' has no attribute 'Str'
According to the changelog, the ast module has removed the Str attribute in favor of Constant, of which Str has been an alias of since Python 3.8. This results in type checking failing with the above error in the CLI, while the GUI appears to be running indefinitely, waiting for the type checking subprocess to return.
To fix, unless you wish to maintain compatibility with Python <3.8 or I am missing something, you must replace every instance of ast.Str, along with potentially ast.Bytes, ast.Ellipsis, ast.NameConstant and ast.Num, with ast.Constant.
Additional info:
- Machine: Arch Linux
- Python version: 3.14.7
- MrPython version: 5.1.6-beta (acquired through the AUR)
According to the changelog, the
astmodule has removed theStrattribute in favor ofConstant, of whichStrhas been an alias of since Python 3.8. This results in type checking failing with the above error in the CLI, while the GUI appears to be running indefinitely, waiting for the type checking subprocess to return.To fix, unless you wish to maintain compatibility with Python <3.8 or I am missing something, you must replace every instance of
ast.Str, along with potentiallyast.Bytes,ast.Ellipsis,ast.NameConstantandast.Num, withast.Constant.Additional info: