import inspect
from typing import TYPE_CHECKING
if TYPE_CHECKING:
    from collections.abc import Iterable
def func(a: Iterable):
    return
inspect.getfullargspec(func)

Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.14/lib/python3.14/inspect.py", line 1261, in getfullargspec
    sig = _signature_from_callable(func,
                                   follow_wrapper_chains=False,
                                   skip_bound_arg=False,
                                   sigcls=Signature,
                                   eval_str=False)
  File "/Library/Frameworks/Python.framework/Versions/3.14/lib/python3.14/inspect.py", line 2502, in _signature_from_callable
    return _signature_from_function(sigcls, obj,
                                    skip_bound_arg=skip_bound_arg,
                                    globals=globals, locals=locals, eval_str=eval_str,
                                    annotation_format=annotation_format)
  File "/Library/Frameworks/Python.framework/Versions/3.14/lib/python3.14/inspect.py", line 2325, in _signature_from_function
    annotations = get_annotations(func, globals=globals, locals=locals, eval_str=eval_str,
                                  format=annotation_format)
  File "/Library/Frameworks/Python.framework/Versions/3.14/lib/python3.14/annotationlib.py", line 890, in get_annotations
    ann = _get_dunder_annotations(obj)
  File "/Library/Frameworks/Python.framework/Versions/3.14/lib/python3.14/annotationlib.py", line 1059, in _get_dunder_annotations
    ann = getattr(obj, "__annotations__", None)
  File "<stdin>", line 1, in __annotate__
    def func(a: Iterable):
                ^^^^^^^^
NameError: name 'Iterable' is not defined
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
    inspect.getfullargspec(func)
    ~~~~~~~~~~~~~~~~~~~~~~^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.14/lib/python3.14/inspect.py", line 1271, in getfullargspec
    raise TypeError('unsupported callable') from ex
TypeError: unsupported callable