From 6140967d51cd7f0ce98bbce65f3f367b62eeb91a Mon Sep 17 00:00:00 2001
From: Yury Selivanov <yury@magic.io>
Date: Tue, 3 Apr 2018 00:10:20 -0400
Subject: Make Map a subclass of collecitons.abc.Mapping

---
 immutables/__init__.py | 3 +++
 immutables/_map.c      | 2 +-
 immutables/map.py      | 4 ++++
 tests/test_map.py      | 4 ++++
 4 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/immutables/__init__.py b/immutables/__init__.py
index d598413..e900c2b 100644
--- a/immutables/__init__.py
+++ b/immutables/__init__.py
@@ -2,6 +2,9 @@ try:
     from ._map import Map
 except ImportError:
     from .map import Map
+else:
+    import collections.abc as _abc
+    _abc.Mapping.register(Map)
 
 
 __all__ = 'Map',
diff --git a/immutables/_map.c b/immutables/_map.c
index 3ed0393..be82cd9 100644
--- a/immutables/_map.c
+++ b/immutables/_map.c
@@ -3032,7 +3032,7 @@ static PyMappingMethods Map_as_mapping = {
 
 PyTypeObject _Map_Type = {
     PyVarObject_HEAD_INIT(NULL, 0)
-    "Map",
+    "immutables._map.Map",
     sizeof(MapObject),
     .tp_methods = Map_methods,
     .tp_as_mapping = &Map_as_mapping,
diff --git a/immutables/map.py b/immutables/map.py
index b6d55dc..83c02bc 100644
--- a/immutables/map.py
+++ b/immutables/map.py
@@ -1,3 +1,4 @@
+import collections.abc
 import reprlib
 
 
@@ -457,3 +458,6 @@ class Map:
         buf = []
         self.__root.dump(buf, 0)
         return '\n'.join(buf)
+
+
+collections.abc.Mapping.register(Map)
diff --git a/tests/test_map.py b/tests/test_map.py
index 3e7633a..7af9513 100644
--- a/tests/test_map.py
+++ b/tests/test_map.py
@@ -1,3 +1,4 @@
+import collections.abc
 import gc
 import random
 import unittest
@@ -795,6 +796,9 @@ class BaseMapTest:
             with HaskKeyCrasher(error_on_hash=True):
                 hash(m)
 
+    def test_abc_1(self):
+        self.assertTrue(issubclass(self.Map, collections.abc.Mapping))
+
 
 class PyMapTest(BaseMapTest, unittest.TestCase):
 
-- 
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