>>> class A:
...     def f(): ...
...
>>> A().f
<bound method A.f of <__main__.A object at 0x1084270e0>>
>>> type(A().f)
<class 'method'>
>>> type(A().f)(None)
Traceback (most recent call last):
  File "<python-input-3>", line 1, in <module>
    type(A().f)(None)
    ~~~~~~~~~~~^^^^^^
TypeError: method expected 2 arguments, got 1
>>> type(A().f)(None, None)
Traceback (most recent call last):
  File "<python-input-4>", line 1, in <module>
    type(A().f)(None, None)
    ~~~~~~~~~~~^^^^^^^^^^^^
TypeError: first argument must be callable
>>> type(A().f)(lambda x: x, None)
Traceback (most recent call last):
  File "<python-input-5>", line 1, in <module>
    type(A().f)(lambda x: x, None)
    ~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
TypeError: instance must not be None
>>> type(A().f)(lambda x: x, 1)
<bound method <lambda> of 1>

>>> type(A().f).__get__
<slot wrapper '__get__' of 'method' objects>

Traceback (most recent call last):
  File "/path/to/RustPython/hello.py", line 10, in <module>
    print(type(A().f)(B(), 1).__reduce__())
          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
AttributeError: 'B' object has no attribute '__name__'. Did you mean: '__ne__'?

>>>>> class A:
.....   def f(): ...
.....
>>>>> A().f
<bound method A.f of <__main__.A object at 0x9e0c380a8>>
>>>>> type(A().f)
<class 'method'>
>>>>> type(A().f)(None, None)
<bound method ? of None>
>>>>> type(A().f)(lambda x: x, None)
<bound method <lambda> of None>
>>>>> type(A().f)(lambda x: x, 1)
<bound method <lambda> of 1>

>>>>> type(A().f).__get__
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: type object 'method' has no attribute '__get__'. Did you mean: '__ge__'?

(<built-in function getattr>, (1, None))

>>>>> class A:
.....   def f(): ...
.....
>>>>> A().f
<bound method A.f of <__main__.A object at 0xb795d8818>>
>>>>> type(A().f)
<class 'method'>
>>>>> type(A().f)(None)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: expected at least 2 arguments, got 1
>>>>> type(A().f)(None, None)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: first argument must be callable
>>>>> type(A().f)(lambda x: x, None)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: instance must not be None
>>>>> type(A().f)(lambda x: x, 1)
<bound method <lambda> of 1>

>>>>> type(A().f).__get__
<slot wrapper '__get__' of 'method' objects>

Traceback (most recent call last):
  File "hello.py", line 9, in <module>
    print(type(A().f)(B(), 1).__reduce__())
          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
AttributeError: 'B' object has no attribute '__name__'. Did you mean: '__ne__'?