下面的代码显示了该问题。
我可以成功地修补此SomeClass的对象示例和静态方法
然而，我似乎无法修补类方法。
非常感谢帮助！

from contextlib import ExitStack
from unittest.mock import patch

class SomeClass:
    def instance_method(self):
        print("instance_method")

    @staticmethod
    def static_method():
        print("static_method")

    @classmethod
    def class_method(cls):
        print("class_method")

# --- desired patch side effect methods ----
def instance_method(self):
    print("mocked instance_method")

def static_method():
    print("mocked static_method")

def class_method(cls):
    print("mocked class_method")

# --- Test ---
obj = SomeClass()

with ExitStack() as stack:
    stack.enter_context(
        patch.object(
            SomeClass,
            "instance_method",
            side_effect=instance_method,
            autospec=True
        )
    )
    stack.enter_context(
        patch.object(
            SomeClass,
            "static_method",
            side_effect=static_method,
            # autospec=True,
        )
    )
    stack.enter_context(
        patch.object(
            SomeClass,
            "class_method",
            side_effect=class_method,
            # autospec=True
        )
    )

    # These work
    obj.instance_method()
    obj.static_method()

    # This fails with TypeError: class_method() missing 1 required positional argument: 'cls'
    obj.class_method()