Wrong assumption of function argcount when using a negated lambda assigned as a class attribute

[ProxPxD]

When executing filter part of a chain, the library mistakenly assumes that a function has more arguments than it really does. It's my first time using the library, but this behaviour is errogenic. The error seems to come from helper.py _getargcount function that at some point erronously assumes that "all args are handleable".

I hope that the provided by me preinvestigation will help to track the bug source and resolve the issue

Code parts

self.is_on_road = lambda car: 0 <= car.position <= Config.road_length self.is_off_road = negate(self.is_on_road)

py_(self.cars).filter(self.is_off_road).value()

Note: if the filter iteratee is replaced with the corresponding lambda [lambda car: self.is_off_road(car)], everything works fine.

Exception

Traceback (most recent call last): File "/usr/share/pycharm/plugins/python-ce/helpers/pydev/pydevd.py", line 1496, in _exec pydev_imports.execfile(file, globals, locals) # execute the script ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/share/pycharm/plugins/python-ce/helpers/pydev/_pydev_imps/_pydev_execfile.py", line 18, in execfile exec(compile(contents+"\n", file, 'exec'), glob, loc) File ".../main.py", line 42, in model.update() File ".../model.py", line 104, in update self._move_all_cars() File ".../model.py", line 138, in _move_all_cars .value() ^^^^^^^ File ".../.venv/lib/python3.11/site-packages/pydash/chaining/chaining.py", line 48, in value return self(self._value) ^^^^^^^^^^^^^^^^^ File ".../.venv/lib/python3.11/site-packages/pydash/chaining/chaining.py", line 108, in call value = self._value.unwrap(value) ^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/proxpxd/obecny_semestr/agent-based-systems/NagelSchreckenberg/.venv/lib/python3.11/site-packages/pydash/chaining/chaining.py", line 144, in unwrap wrapper._value = wrapper.value.unwrap(value) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File ".../.venv/lib/python3.11/site-packages/pydash/chaining/chaining.py", line 152, in unwrap return wrapper.method(value, *wrapper.args, **wrapper.kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File ".../.venv/lib/python3.11/site-packages/pydash/collections.py", line 300, in filter return [value for istrue, value, , _ in iteriteratee(collection, predicate) if is_true] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File ".../.venv/lib/python3.11/site-packages/pydash/collections.py", line 300, in return [value for istrue, value, , _ in iteriteratee(collection, predicate) if is_true] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File ".../.venv/lib/python3.11/site-packages/pydash/helpers.py", line 111, in iteriteratee yield callit(cbk, item, key, obj, argcount=argcount), item, key, obj ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File ".../.venv/lib/python3.11/site-packages/pydash/helpers.py", line 43, in callit return iteratee(args[:argstop]) ^^^^^^^^^^^^^^^^^^^^^^^^^ File ".../.venv/lib/python3.11/site-packages/pydash/functions.py", line 518, in call return not self.func(args, **kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^ TypeError: Model.init..() takes 1 positional argument but 3 were given