PEP8 style properties and fields dynamic objects check (QuantConnect#90)

* Fix: test for PEP8 properties/fields in dynamic objects

* Bump version to 2.0.35

* Minor refactor

Author: jhonabreul

src/embed_tests/TestPropertyAccess.cs

@@ -966,6 +966,33 @@ public override bool TryInvokeMember(InvokeMemberBinder binder, object[] args, o
             protected static string NonDynamicProtectedStaticProperty { get; set; } = "Default value";
 
             protected string NonDynamicProtectedField = "Default value";
+
+            public string NonDynamicField;
+        }
+
+        [TestCase("NonDynamicField")]
+        [TestCase("NonDynamicProperty")]
+        public void TestDynamicObjectCanAccessCSharpNonDynamicPropertiesAndFieldsWithPEP8Syntax(string name)
+        {
+            using var _ = Py.GIL();
+
+            var model = new DynamicFixture();
+            using var pyModel = model.ToPython();
+
+            var pep8Name = name.ToSnakeCase();
+            pyModel.SetAttr(pep8Name, "Piertotum Locomotor".ToPython());
+
+            Assert.IsFalse(model.Properties.ContainsKey(name));
+            Assert.IsFalse(model.Properties.ContainsKey(pep8Name));
+
+            var value = pyModel.GetAttr(pep8Name).As<string>();
+            Assert.AreEqual("Piertotum Locomotor", value);
+
+            var memberInfo = model.GetType().GetMember(name)[0];
+            var managedValue = memberInfo.MemberType == MemberTypes.Property
+                ? ((PropertyInfo)memberInfo).GetValue(model)
+                : ((FieldInfo)memberInfo).GetValue(model);
+            Assert.AreEqual(value, managedValue);
         }
 
         public class TestPerson : IComparable, IComparable<TestPerson>

src/perf_tests/Python.PerformanceTests.csproj

@@ -13,7 +13,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.*" />
-    <PackageReference Include="quantconnect.pythonnet" Version="2.0.34" GeneratePathProperty="true">
+    <PackageReference Include="quantconnect.pythonnet" Version="2.0.35" GeneratePathProperty="true">
       <IncludeAssets>compile</IncludeAssets>
     </PackageReference>
   </ItemGroup>
@@ -25,7 +25,7 @@
   </Target>
 
   <Target Name="CopyBaseline" AfterTargets="Build">
-    <Copy SourceFiles="$(NuGetPackageRoot)quantconnect.pythonnet\2.0.34\lib\net5.0\Python.Runtime.dll" DestinationFolder="$(OutDir)baseline" />
+    <Copy SourceFiles="$(NuGetPackageRoot)quantconnect.pythonnet\2.0.35\lib\net5.0\Python.Runtime.dll" DestinationFolder="$(OutDir)baseline" />
   </Target>
 
   <Target Name="CopyNewBuild" AfterTargets="Build">

src/runtime/Properties/AssemblyInfo.cs

@@ -4,5 +4,5 @@
 [assembly: InternalsVisibleTo("Python.EmbeddingTest, PublicKey=00240000048000009400000006020000002400005253413100040000110000005ffd8f49fb44ab0641b3fd8d55e749f716e6dd901032295db641eb98ee46063cbe0d4a1d121ef0bc2af95f8a7438d7a80a3531316e6b75c2dae92fb05a99f03bf7e0c03980e1c3cfb74ba690aca2f3339ef329313bcc5dccced125a4ffdc4531dcef914602cd5878dc5fbb4d4c73ddfbc133f840231343e013762884d6143189")]
 [assembly: InternalsVisibleTo("Python.Test, PublicKey=00240000048000009400000006020000002400005253413100040000110000005ffd8f49fb44ab0641b3fd8d55e749f716e6dd901032295db641eb98ee46063cbe0d4a1d121ef0bc2af95f8a7438d7a80a3531316e6b75c2dae92fb05a99f03bf7e0c03980e1c3cfb74ba690aca2f3339ef329313bcc5dccced125a4ffdc4531dcef914602cd5878dc5fbb4d4c73ddfbc133f840231343e013762884d6143189")]
 
-[assembly: AssemblyVersion("2.0.34")]
-[assembly: AssemblyFileVersion("2.0.34")]
+[assembly: AssemblyVersion("2.0.35")]
+[assembly: AssemblyFileVersion("2.0.35")]

src/runtime/Python.Runtime.csproj

@@ -5,7 +5,7 @@
     <RootNamespace>Python.Runtime</RootNamespace>
     <AssemblyName>Python.Runtime</AssemblyName>
     <PackageId>QuantConnect.pythonnet</PackageId>
-    <Version>2.0.34</Version>
+    <Version>2.0.35</Version>
     <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
     <PackageLicenseFile>LICENSE</PackageLicenseFile>
     <RepositoryUrl>https://github.com/pythonnet/pythonnet</RepositoryUrl>

src/runtime/Types/DynamicClassObject.cs

@@ -66,10 +66,7 @@ private static CallSite<Func<CallSite, object, object, object>> SetAttrCallSite(
         /// </summary>
         public static NewReference tp_getattro(BorrowedReference ob, BorrowedReference key)
         {
-            var result = Runtime.PyObject_GenericGetAttr(ob, key);
-
-            // If AttributeError was raised, we try to get the attribute from the managed object dynamic properties.
-            if (Exceptions.ExceptionMatches(Exceptions.AttributeError))
+            if (!TryGetNonDynamicMember(ob, key, out var result))
             {
                 var clrObj = (CLRObject)GetManagedObject(ob)!;
 
@@ -103,20 +100,14 @@ public static NewReference tp_getattro(BorrowedReference ob, BorrowedReference k
         /// </summary>
         public static int tp_setattro(BorrowedReference ob, BorrowedReference key, BorrowedReference val)
         {
-            var clrObj = (CLRObject)GetManagedObject(ob)!;
-            var name = Runtime.GetManagedString(key);
-
-            // If the key corresponds to a valid property or field of the class, we let the default implementation handle it.
-            var clrObjectType = clrObj.inst.GetType();
-            var bindingFlags = BindingFlags.Instance | BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic;
-            var property = clrObjectType.GetProperty(name, bindingFlags);
-            var field = property == null ? clrObjectType.GetField(name, bindingFlags) : null;
-            if ((property != null && property.SetMethod != null) || field != null)
+            if (TryGetNonDynamicMember(ob, key, out _, clearExceptions: true))
             {
                 return Runtime.PyObject_GenericSetAttr(ob, key, val);
             }
 
-            var callsite = SetAttrCallSite(name, clrObjectType);
+            var clrObj = (CLRObject)GetManagedObject(ob)!;
+            var name = Runtime.GetManagedString(key);
+            var callsite = SetAttrCallSite(name, clrObj.inst.GetType());
             try
             {
                 callsite.Target(callsite, clrObj.inst, PyObject.FromNullableReference(val));
@@ -129,5 +120,19 @@ public static int tp_setattro(BorrowedReference ob, BorrowedReference key, Borro
 
             return 0;
         }
+
+        private static bool TryGetNonDynamicMember(BorrowedReference ob, BorrowedReference key, out NewReference value, bool clearExceptions = false)
+        {
+            value = Runtime.PyObject_GenericGetAttr(ob, key);
+            // If AttributeError was raised, we try to get the attribute from the managed object dynamic properties.
+            var result = !Exceptions.ExceptionMatches(Exceptions.AttributeError);
+
+            if (clearExceptions)
+            {
+                Exceptions.Clear();
+            }
+
+            return result;
+        }
     }
 }