conj, real, and imag not found in array_api_compat.torch

[asmeurer]

Running the tests against array_api_compat.torch (with #184 and data-apis/array-api-compat#38) I get several errors like

FAILED array_api_tests/test_operators_and_elementwise_functions.py::test_conj - AttributeError: module 'array_api_tests._array_module' has no attribute 'conj'
FAILED array_api_tests/test_operators_and_elementwise_functions.py::test_imag - AttributeError: module 'array_api_tests._array_module' has no attribute 'imag'
FAILED array_api_tests/test_operators_and_elementwise_functions.py::test_real - AttributeError: module 'array_api_tests._array_module' has no attribute 'real'

Here's what the failure looks like

_______________________________________________________________________________ test_imag _______________________________________________________________________________

    @given(xps.arrays(dtype=xps.complex_dtypes(), shape=hh.shapes()))
>   def test_imag(x):

array_api_tests/test_operators_and_elementwise_functions.py:1092:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

x = tensor([], dtype=torch.complex64)

    @given(xps.arrays(dtype=xps.complex_dtypes(), shape=hh.shapes()))
    def test_imag(x):
>       out = xp.imag(x)
E       AttributeError: module 'array_api_tests._array_module' has no attribute 'imag'
E       Falsifying example: test_imag(
E           x=tensor([], dtype=torch.complex64),
E       )

array_api_tests/test_operators_and_elementwise_functions.py:1093: AttributeError

But these functions are in the namespace:

>>> import array_api_compat.torch
>>> array_api_compat.torch.conj
<built-in method conj of type object at 0x10f8b2be0>
>>> array_api_compat.torch.real
<built-in method real of type object at 0x10f8b2be0>
>>> array_api_compat.torch.imag
<built-in method imag of type object at 0x10f8b2be0>