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Description
Feature
I'm trying to fix @unittest.expectedFailure test_inplace_on_self in file test_set.py.
def test_inplace_on_self(self):
t = self.s.copy()
t |= t
self.assertEqual(t, self.s)
t &= t
self.assertEqual(t, self.s). -> FAIL
t -= t
self.assertEqual(t, self.thetype()). -> FAIL
t = self.s.copy()
t ^= t
self.assertEqual(t, self.thetype())
I found the two operator fail.
&= and -= is not work correctly.
[ &= ]
- RustPython
>>>>> s = set({'a', 'b', 'c'})
>>>>> s &= s
>>>>> s
set()
- CPython
>>> s = set({'a', 'b', 'c'})
>>> s &= s
>>> s
{'b', 'c', 'a'}
[ -= ]
- RustPython
>>>>> s = set({'a', 'b', 'c'})
>>>>> s -= s
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
RuntimeError: set changed size during iteration
Maybe the points to start
&=
#[pymethod(magic)]
fn iand(zelf: PyRef<Self>, set: AnySet, vm: &VirtualMachine) -> PyResult<PyRef<Self>> {
zelf.inner
.intersection_update(std::iter::once(set.into_iterable(vm)?), vm)?;
Ok(zelf)
}
-=
#[pymethod(magic)]
fn isub(zelf: PyRef<Self>, set: AnySet, vm: &VirtualMachine) -> PyResult<PyRef<Self>> {
zelf.inner
.difference_update(set.into_iterable_iter(vm)?, vm)?;
Ok(zelf)
}
Python Documentation
CPython Method
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