From e233328d38f2acb8388f5d90985ea75026801c89 Mon Sep 17 00:00:00 2001
From: Matthew Honnibal <honnibal+gh@gmail.com>
Date: Tue, 27 Sep 2016 13:22:30 +0200
Subject: [PATCH] Fix Issue #371: Lexeme objects were unhashable.

---
 spacy/lexeme.pyx                 |  3 +++
 spacy/tests/vocab/test_lexeme.py | 10 ++++++++++
 2 files changed, 13 insertions(+)

diff --git a/spacy/lexeme.pyx b/spacy/lexeme.pyx
index 866f62da1..459c9c199 100644
--- a/spacy/lexeme.pyx
+++ b/spacy/lexeme.pyx
@@ -68,6 +68,9 @@ cdef class Lexeme:
         else:
             raise NotImplementedError(op)
 
+    def __hash__(self):
+        return self.c.orth
+
     def set_flag(self, attr_id_t flag_id, bint value):
         Lexeme.c_set_flag(self.c, flag_id, value)
     
diff --git a/spacy/tests/vocab/test_lexeme.py b/spacy/tests/vocab/test_lexeme.py
index 9d6e7c96c..e278fd707 100644
--- a/spacy/tests/vocab/test_lexeme.py
+++ b/spacy/tests/vocab/test_lexeme.py
@@ -30,3 +30,13 @@ def test_lexeme_lt(en_vocab):
     assert noun < opera
     assert opera > noun
 
+
+def test_lexeme_hash(en_vocab):
+    '''Test that lexemes are hashable.'''
+    phantom = en_vocab['phantom']
+
+    opera = en_vocab['opera']
+
+    lexes = {phantom: phantom, opera: opera}
+    assert lexes[phantom].orth_ == 'phantom'
+    assert lexes[opera].orth_ == 'opera'