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Passing an arbitrary .NET object as the value of an attribute of PyObject#373

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Merged
vmuriart merged 1 commit intopythonnet:masterfromyagweb:master
Feb 17, 2017
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1 change: 1 addition & 0 deletionsAUTHORS.md
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Expand Up@@ -29,6 +29,7 @@
- Sean Freitag ([@cowboygneox](https://github.com/cowboygneox))
- Serge Weinstock ([@sweinst](https://github.com/sweinst))
- Virgil Dupras ([@hsoft](https://github.com/hsoft))
- Wenguang Yang ([@yagweb](https://github.com/yagweb))
- Xavier Dupré ([@sdpython](https://github.com/sdpython))
- Zane Purvis ([@zanedp](https://github.com/zanedp))
- ([@ArvidJB](https://github.com/ArvidJB))
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2 changes: 2 additions & 0 deletionsCHANGELOG.md
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Expand Up@@ -15,6 +15,8 @@ This document follows the conventions laid out in [Keep a CHANGELOG][].
- Added Embedded tests on Appveyor (#353)
- Added PY3 settings to configuration-manager (#346)
- Added `Slack` chat (#384)(#383)(#386)
- Added function of passing an arbitrary .NET object as the value
of an attribute of PyObject (#370)(#373)

### Changed

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2 changes: 2 additions & 0 deletionssrc/embed_tests/Python.EmbeddingTest.csproj
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Expand Up@@ -65,6 +65,7 @@
<DebugType>pdbonly</DebugType>
</PropertyGroup>
<ItemGroup>
<Reference Include="Microsoft.CSharp" />
<Reference Include="nunit.framework, Version=3.6.0.0, Culture=neutral, PublicKeyToken=2638cd05610744eb, processorArchitecture=MSIL">
<HintPath>..\..\packages\NUnit.3.6.0\lib\net40\nunit.framework.dll</HintPath>
</Reference>
Expand All@@ -76,6 +77,7 @@
</ItemGroup>
<ItemGroup>
<Compile Include="pyinitialize.cs" />
<Compile Include="dynamic.cs" />
<Compile Include="pyimport.cs" />
<Compile Include="pyiter.cs" />
<Compile Include="pylong.cs" />
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122 changes: 122 additions & 0 deletionssrc/embed_tests/dynamic.cs
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@@ -0,0 +1,122 @@
using System;
using System.Text;
using NUnit.Framework;
using Python.Runtime;

namespace Python.EmbeddingTest
{
[TestFixture]
public class dynamicTest
{
private Py.GILState gil;

[SetUp]
public void SetUp()
{
gil = Py.GIL();
}

[TearDown]
public void TearDown()
{
gil.Dispose();
}

/// <summary>
/// Set the attribute of a pyobject with a .NET object.
/// </summary>
[Test]
public void AssignObject()
{
StringBuilder stream = new StringBuilder();
dynamic sys = Py.Import("sys");
sys.testattr = stream;
// Check whether there are the same object.
var _stream = sys.testattr.AsManagedObject(typeof(StringBuilder));
Assert.AreEqual(_stream, stream);

PythonEngine.RunSimpleString(
"import sys\n" +
"sys.testattr.Append('Hello!')\n");
Assert.AreEqual(stream.ToString(), "Hello!");
}

/// <summary>
/// Set the attribute of a pyobject to null.
/// </summary>
[Test]
public void AssignNone()
{
dynamic sys = Py.Import("sys");
sys.testattr = new StringBuilder();
Assert.IsNotNull(sys.testattr);

sys.testattr = null;
Assert.IsNull(sys.testattr);
}

/// <summary>
/// Check whether we can get the attr of a python object when the
/// value of attr is a PyObject.
/// </summary>
[Test]
public void AssignPyObject()
{
dynamic sys = Py.Import("sys");
dynamic io = Py.Import("io");
sys.testattr = io.StringIO();
dynamic bb = sys.testattr; //Get the PyObject
bb.write("Hello!");
Assert.AreEqual(bb.getvalue().ToString(), "Hello!");
}

/// <summary>
/// Pass the .NET object in Python side.
/// </summary>
[Test]
public void PassObjectInPython()
{
StringBuilder stream = new StringBuilder();
dynamic sys = Py.Import("sys");
sys.testattr1 = stream;

//Pass the .NET object in Python side
PythonEngine.RunSimpleString(
"import sys\n" +
"sys.testattr2 = sys.testattr1\n"
);

//Compare in Python
PythonEngine.RunSimpleString(
"import sys\n" +
"sys.testattr3 = sys.testattr1 is sys.testattr2\n"
);
Assert.AreEqual(sys.testattr3.ToString(), "True");

//Compare in .NET
Assert.AreEqual(sys.testattr1, sys.testattr2);
}

/// <summary>
/// Pass the PyObject in .NET side
/// </summary>
[Test]
public void PassPyObjectInNet()
{
StringBuilder stream = new StringBuilder();
dynamic sys = Py.Import("sys");
sys.testattr1 = stream;
sys.testattr2 = sys.testattr1;

//Compare in Python
PyObject res = PythonEngine.RunString(
"import sys\n" +
"sys.testattr3 = sys.testattr1 is sys.testattr2\n"
);
Assert.AreEqual(sys.testattr3.ToString(), "True");

//Compare in .NET
Assert.AreEqual(sys.testattr1, sys.testattr2);
}
}
}
32 changes: 17 additions & 15 deletionssrc/runtime/pyobject.cs
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Expand Up@@ -887,30 +887,32 @@ public override int GetHashCode()
return Runtime.PyObject_Hash(obj).ToInt32();
}

public override bool TryGetMember(GetMemberBinder binder, out object result)

public long Refcount
{
if (this.HasAttr(binder.Name))
{
result = CheckNone(this.GetAttr(binder.Name));
return true;
}
else
get
{
returnbase.TryGetMember(binder, out result);
returnRuntime.Refcount(obj);
}
}


public override bool TryGetMember(GetMemberBinder binder, out object result)
{
result = CheckNone(this.GetAttr(binder.Name));
return true;
}

public override bool TrySetMember(SetMemberBinder binder, object value)
{
if (this.HasAttr(binder.Name))
{
this.SetAttr(binder.Name, (PyObject)value);
return true;
}
else
IntPtr ptr = Converter.ToPython(value, value?.GetType());
int r = Runtime.PyObject_SetAttrString(obj, binder.Name, ptr);
if (r < 0)
{
return base.TrySetMember(binder, value);
throw new PythonException();
}
Runtime.XDecref(ptr);
return true;
}

private void GetArgs(object[] inargs, out PyTuple args, out PyDict kwargs)
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