add method unary

README.md

@@ -540,7 +540,7 @@ Partially supported
 - [ ] tryCatch
 - [ ] type
 - [ ] unapply
-- [ ] unary
+- [x] unary
 - [ ] uncurryN
 - [ ] unfold
 - [x] 0.1.2 union

ramda/__init__.py

@@ -96,6 +96,7 @@
 from .tap import tap
 from .times import times
 from .toString import toString
+from .unary import unary
 from .union import union
 from .unionWith import unionWith
 from .uniq import uniq

ramda/unary.py

@@ -0,0 +1,4 @@
+from .nAry import nAry
+from .private._curry1 import _curry1
+
+unary = _curry1(lambda fn: nAry(1, fn))

test/test_unary.py

@@ -0,0 +1,20 @@
+
+import unittest
+
+import ramda as R
+from ramda.private._inspect import funcArgsLength
+
+"""
+https://github.com/ramda/ramda/blob/master/test/unary.js
+"""
+
+
+class TestUnary(unittest.TestCase):
+  def test_turns_multiple_argument_function_into_unary_one(self):
+    fn = R.unary(lambda *args: list(args))
+    self.assertEqual(1, funcArgsLength(fn))
+    self.assertEqual([1], fn(1, 2, 3))
+
+
+if __name__ == '__main__':
+  unittest.main()