Add PyCall.same?

Author: mrkn

lib/pycall.rb

@@ -58,6 +58,17 @@ def hasattr?(obj, name)
     LibPython::Helpers.hasattr?(obj.__pyptr__, name)
   end
 
+  def same?(left, right)
+    case left
+    when PyObjectWrapper
+      case right
+      when PyObjectWrapper
+        return left.__pyptr__ == right.__pyptr__
+      end
+    end
+    false
+  end
+
   def import_module(name)
     LibPython::Helpers.import_module(name)
   end

spec/pycall_spec.rb

@@ -70,6 +70,20 @@
     end
   end
 
+  describe '.same?' do
+    let(:simple_module) { PyCall.import_module('pycall.simple_module') }
+    let(:simple_class) { PyCall.import_module('pycall.simple_class').SimpleClass }
+
+    specify do
+      pyobj_1 = simple_class.new
+      expect(PyCall.same?(pyobj_1, pyobj_1)).to eq(true)
+      pyobj_2 = simple_module.identity(pyobj_1)
+      expect(pyobj_2).not_to be_equal(pyobj_1)
+      expect(PyCall.same?(pyobj_1, pyobj_2)).to eq(true)
+      expect(PyCall.same?(pyobj_1, simple_class.new)).to eq(false)
+    end
+  end
+
   describe '.import_module' do
     subject { PyCall.import_module('sys') }
 

spec/python/pycall/simple_module.py

@@ -1,3 +1,6 @@
+def identity(x):
+    return x
+
 def double(x):
     return 2 * x