Put full kernel info in REST API response for all kernels

IPython/html/services/kernelspecs/handlers.py

@@ -19,8 +19,9 b' class MainKernelSpecHandler(IPythonHandler):'
         ksm = self.kernel_spec_manager
         results = []
         for kernel_name in ksm.find_kernel_specs():
-            results.append(dict(name=kernel_name,
-                display_name=ksm.get_kernel_spec(kernel_name).display_name))
+            d = ksm.get_kernel_spec(kernel_name).to_dict()
+            d['name'] = kernel_name
+            results.append(d)
 
         self.set_header("Content-Type", 'application/json')
         self.finish(jsonapi.dumps(results))

IPython/html/services/kernelspecs/tests/test_kernelspecs_api.py

@@ -71,8 +71,11 b' class APITest(NotebookTestBase):'
         
         # 2: the sample kernelspec created in setUp, and the native Python kernel
         self.assertEqual(len(specs), 2)
-        assert any(s == {'name': 'sample', 'display_name': 'Test kernel'}
-                    for s in specs), specs
+
+        def is_sample_kernelspec(s):
+            return s['name'] == 'sample' and s['display_name'] == 'Test kernel'
+
+        assert any(is_sample_kernelspec(s) for s in specs), specs
 
     def test_get_kernelspec(self):
         spec = self.ks_api.kernel_spec_info('Sample').json()  # Case insensitive

IPython/kernel/kernelspec.py

@@ -48,13 +48,16 b' class KernelSpec(HasTraits):'
             kernel_dict = json.load(f)
         return cls(resource_dir=resource_dir, **kernel_dict)
 
-    def to_json(self):
-        return json.dumps(dict(argv=self.argv,
+    def to_dict(self):
+        return dict(argv=self.argv,
                                env=self.env,
                                display_name=self.display_name,
                                language=self.language,
                                codemirror_mode=self.codemirror_mode,
-                             ))
+                   )
+
+    def to_json(self):
+        return json.dumps(self.to_dict())
 
 def _is_kernel_dir(path):
     """Is ``path`` a kernel directory?"""