First commit after changed file framework

common.py

@@ -0,0 +1,32 @@
+
+# -*- coding: utf-8 -*-
+from _ctypes import PyObj_FromPtr
+import json, re
+
+class NoIndent(object):
+    """ Value wrapper. """
+    def __init__(self, value):
+        self.value = value
+
+class MyEncoder(json.JSONEncoder):
+    FORMAT_SPEC = '@@{}@@'
+    regex = re.compile(FORMAT_SPEC.format(r'(\d+)'))
+
+    def __init__(self, **kwargs):
+        super(MyEncoder, self).__init__(**kwargs)
+
+    def default(self, obj):
+        return (self.FORMAT_SPEC.format(id(obj)) if isinstance(obj, NoIndent)
+                else super(MyEncoder, self).default(obj))
+
+    def encode(self, obj):
+        format_spec = self.FORMAT_SPEC  # Local var to expedite access.
+        json_repr = super(MyEncoder, self).encode(obj)  # Default JSON.
+        for match in self.regex.finditer(json_repr):
+            id = int(match.group(1))
+            no_indent = PyObj_FromPtr(id)
+            json_obj_repr = json.dumps(no_indent.value)
+            json_repr = json_repr.replace(
+                            '"{}"'.format(format_spec.format(id)), json_obj_repr)
+
+        return json_repr