add method fromPairs

README.md

@@ -197,7 +197,7 @@ R.equals(float('nan'), float('nan')) # True
 - [x] 0.1.2 flip
 - [x] 0.1.4 forEach
 - [ ] forEachObjIndexed
-- [ ] fromPairs
+- [x] fromPairs
 - [x] 0.1.2 groupBy
 - [ ] groupWith
 - [x] 0.1.2 gt

ramda/__init__.py

@@ -32,6 +32,7 @@
 from .flatten import flatten
 from .flip import flip
 from .forEach import forEach
+from .fromPairs import fromPairs
 from .groupBy import groupBy
 from .gt import gt
 from .gte import gte

ramda/fromPairs.py

@@ -0,0 +1,13 @@
+from .private._curry1 import _curry1
+
+
+def inner_fromPairs(pairs):
+  result = {}
+  idx = 0
+  while idx < len(pairs):
+    result[pairs[idx][0]] = pairs[idx][1]
+    idx += 1
+  return result
+
+
+fromPairs = _curry1(inner_fromPairs)

test/test_fromPair.py

@@ -0,0 +1,19 @@
+
+import unittest
+
+import ramda as R
+
+"""
+https://github.com/ramda/ramda/blob/master/test/fromPair.js
+"""
+
+
+class TestFromPair(unittest.TestCase):
+  def test_combines_an_array_of_two_element_arrays_into_a_dict(self):
+    self.assertEqual({'a': 1, 'b': 2, 'c': 3}, R.fromPairs([['a', 1], ['b', 2], ['c', 3]]))
+
+  def test_gives_later_entries_precedence_over_earlier_ones(self):
+    self.assertEqual({'x': 2}, R.fromPairs([['x', 1], ['x', 2]]))
+
+if __name__ == '__main__':
+  unittest.main()