AttributeError: module 'typing' has no attribute 'TypingMeta'

[Hendiadyoin1]

for some reason my program throws this error rooted in this lib. when i try to simply overload the init of my class. Code:

from overloading import overload
import cmath

class Quaternion:
    def __init__(self, r: int, i: int, j: int, k: int):
        self.r = r
        self.i = i
        self.j = j
        self.k = k

    @overload
    def __init__(self, c: complex):
        self.r = c.real
        self.i = c.imag


print(Quaternion(1, 2, 3, 4).r)
print(Quaternion(1 + 2j).r)

Error:

Traceback (most recent call last): File "C:...\Python\Python37\lib\site-packages\overloading.py", line 63, in overload return register(__registry[fname], func) KeyError: 'main.Quaternion.init'

During handling of the above exception, another exception occurred:

Traceback (most recent call last): File "C:...\Python\Testing\quaternion.py", line 6, in class Quaternion: File "C:...\Python\Testing\quaternion.py", line 14, in Quaternion def init(self, c: complex): File "C:...\Python\Python37\lib\site-packages\overloading.py", line 65, in overload registry[fname] = overloaded(func) File "C:...\Python\Python37\lib\site-packages\overloading.py", line 151, in overloaded return register(dispatcher, func) File "C:...\Python\Python37\lib\site-packages\overloading.py", line 199, in register signature = get_signature(fn) File "C:...\Python\Python37\lib\site-packages\overloading.py", line 441, in get_signature types = tuple(normalize_type(type_hints.get(param, AnyType)) for param in parameters) File "C:...\Python\Python37\lib\site-packages\overloading.py", line 441, in types = tuple(normalize_type(type_hints.get(param, AnyType)) for param in parameters) File "C:...\Python\Python37\lib\site-packages\overloading.py", line 468, in normalize_type if not typing or not isinstance(type, typing.TypingMeta) or type is AnyType: AttributeError: module 'typing' has no attribute 'TypingMeta'

[fpiedrah]

Same here, python 3.7

[Paprikar]

The downgrade of the typing module helped me (from the python repository) to version 3.5.2.2. You can also forcefully ignore the typing module in the overloading module by assigning typing = None after the 30th line in the file overloading.py, but I think the typing module features will not be available.

[tony-is-coding]

such an unfortunately infomation ! we want use python3; this maybe an solution for overload: https://python3-cookbook.readthedocs.io/zh_CN/latest/c09/p20_implement_multiple_dispatch_with_function_annotations.html

[kaimingkuang]

The downgrade of the typing module helped me (from the python repository) to version 3.5.2.2. You can also forcefully ignore the typing module in the overloading module by assigning typing = None after the 30th line in the file overloading.py, but I think the typing module features will not be available.

Same issue here. Downgrading all the way to 3.5 sounds like a major hassle.

[ImahnShekhzadeh]

I have the same issue. @bintoro If you ask me, this project should be archived, since it's not in active development and does not work for the newest versions of python.