Add Hash of WeakProxy for test\test_Weakref.py's "test_proxy_hash "

Fix Hash of WeakProxy : remove "?" ending of the code

Fix weakproxy.rs for test_proxy_hash to solve error

Author: jyj0816

Lib/test/test_weakref.py

@@ -476,8 +476,6 @@ def __reversed__(self):
         obj = MyObj()
         self.assertEqual("".join(reversed(weakref.proxy(obj))), "cba")
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
     def test_proxy_hash(self):
         class MyObj:
             def __hash__(self):

vm/src/builtins/weakproxy.rs

@@ -1,19 +1,19 @@
-use once_cell::sync::Lazy;
-
 use super::{PyStr, PyStrRef, PyType, PyTypeRef, PyWeak};
 use crate::{
     atomic_func,
     class::PyClassImpl,
+    common::hash::PyHash,
     function::{OptionalArg, PyComparisonValue, PySetterValue},
     protocol::{PyIter, PyIterReturn, PyMappingMethods, PySequenceMethods},
     types::{
-        AsMapping, AsSequence, Comparable, Constructor, GetAttr, IterNext, Iterable,
+        AsMapping, AsSequence, Comparable, Constructor, GetAttr, Hashable, IterNext, Iterable,
         PyComparisonOp, Representable, SetAttr,
     },
     Context, Py, PyObject, PyObjectRef, PyPayload, PyRef, PyResult, VirtualMachine,
 };
+use once_cell::sync::Lazy;
 
-#[pyclass(module = false, name = "weakproxy")]
+#[pyclass(module = false, name = "weakproxy", unhashable = true)]
 #[derive(Debug)]
 pub struct PyWeakProxy {
     weak: PyRef<PyWeak>,
@@ -123,6 +123,7 @@ impl PyWeakProxy {
         obj.del_item(&*needle, vm)
     }
 }
+
 impl Iterable for PyWeakProxy {
     fn iter(zelf: PyRef<Self>, vm: &VirtualMachine) -> PyResult {
         let obj = zelf.try_upgrade(vm)?;
@@ -226,3 +227,9 @@ impl Representable for PyWeakProxy {
 pub fn init(context: &Context) {
     PyWeakProxy::extend_class(context, context.types.weakproxy_type);
 }
+
+impl Hashable for PyWeakProxy {
+    fn hash(zelf: &Py<Self>, vm: &VirtualMachine) -> PyResult<PyHash> {
+        zelf.try_upgrade(vm)?.hash(vm)
+    }
+}