diff --git a/README.md b/README.md
index 71c75bf..28185e9 100644
--- a/README.md
+++ b/README.md
@@ -427,7 +427,7 @@ Python modulo on negative numbers has different behavior than JS.
 ```
 
 ```js
-5 % -3 // 2
+5 % -3; // 2
 ```
 
 - [ ] move
@@ -600,6 +600,8 @@ class A:
   def __init__(self, v2):
     self.v2 = v2
 
+R.toPairs(A(1)) # [['v2', 1]]
+
 class B(A):
   v3 = 'not included'
   def __init__(self, v2, v4):
@@ -610,7 +612,27 @@ b = B('v2', 'v4')
 R.toPairs(b) # [['v2', 'v2'], ['v4', 'v4']]
 ```
 
-- [ ] toPairsIn
+- [x] toPairsIn
+
+```python
+R.toPairsIn({'a': 1, 'b': 2}) # [['a', 1], ['b', 2]]
+
+class A:
+  v1 = 'included'
+  def __init__(self, v2):
+    self.v2 = v2
+
+R.toPairsIn(A('v2')) # [['v1', 'included'], ['v2', 'v2']]
+
+class B(A):
+  v3 = 'included too'
+  def __init__(self, v2, v4):
+    super().__init__(v2) # this is required
+    self.v4 = v4
+
+R.toPairsIn(B('v2', 'v4')) # [['v3', 'included too'], ['v1', 'included'], ['v2', 'v2'], ['v4', 'v4']]
+```
+
 - [x] 0.1.2 toString
 
 Partially supported
diff --git a/ramda/__init__.py b/ramda/__init__.py
index 63ac60e..93bae61 100644
--- a/ramda/__init__.py
+++ b/ramda/__init__.py
@@ -107,6 +107,7 @@
 from .tap import tap
 from .times import times
 from .toPairs import toPairs
+from .toPairsIn import toPairsIn
 from .toString import toString
 from .unary import unary
 from .union import union
diff --git a/ramda/toPairsIn.py b/ramda/toPairsIn.py
new file mode 100644
index 0000000..44d62d2
--- /dev/null
+++ b/ramda/toPairsIn.py
@@ -0,0 +1,13 @@
+from .keysIn import keysIn
+from .private._curry1 import _curry1
+from .private._helper import getAttribute
+
+
+def inner_toPairsIn(obj):
+  pairs = []
+  for key in keysIn(obj):
+    pairs.append([key, getAttribute(obj, key)])
+  return pairs
+
+
+toPairsIn = _curry1(inner_toPairsIn)
diff --git a/test/test_toPairsIn.py b/test/test_toPairsIn.py
new file mode 100644
index 0000000..798da38
--- /dev/null
+++ b/test/test_toPairsIn.py
@@ -0,0 +1,43 @@
+
+import unittest
+
+import ramda as R
+
+"""
+https://github.com/ramda/ramda/blob/master/test/toPairsIn.js
+"""
+
+
+class TestToPairsIn(unittest.TestCase):
+  def test_converts_a_dict_into_an_array_of_two_element_key_value_arrays(self):
+    self.assertEqual([['a', 1], ['b', 2], ['c', 3]], R.toPairsIn({'a': 1, 'b': 2, 'c': 3}))
+
+  def test_converts_an_object_into_an_array_of_two_element_key_value_arrays(self):
+    class A:
+      a = 'you can see me'
+
+      def __init__(self, b):
+        self.b = b
+    a = A('b')
+    self.assertEqual([['a', 'you can see me'], ['b', 'b']], R.toPairsIn(a))
+
+    class B(A):
+      c = 'you can see me too'
+
+      def __init__(self, b, d):
+        super().__init__(b)
+        self.d = d
+    b = B('b', 'd')
+    self.assertEqual([['c', 'you can see me too'], ['a', 'you can see me'], ['b', 'b'], ['d', 'd']], R.toPairsIn(b))
+
+    class C(A):
+      c = 'you can see me too'
+
+      def __init__(self, d):
+        self.d = d
+    c = C('d')
+    self.assertEqual([['c', 'you can see me too'], ['a', 'you can see me'], ['d', 'd']], R.toPairsIn(c))
+
+
+if __name__ == '__main__':
+  unittest.main()