* Ensure Morphology can be pickled, to address Issue #125.

spacy/morphology.pxd

@@ -25,6 +25,7 @@ cdef class Morphology:
     cdef readonly Pool mem
     cdef readonly StringStore strings
     cdef public object lemmatizer
+    cdef readonly object tag_map
     cdef public object n_tags
     cdef public object reverse_index
     cdef public object tag_names

spacy/morphology.pyx

@@ -14,6 +14,7 @@ cdef class Morphology:
     def __init__(self, StringStore string_store, tag_map, lemmatizer):
         self.mem = Pool()
         self.strings = string_store
+        self.tag_map = tag_map
         self.lemmatizer = lemmatizer
         self.n_tags = len(tag_map) + 1
         self.tag_names = tuple(sorted(tag_map.keys()))
@@ -28,6 +29,9 @@ cdef class Morphology:
             self.reverse_index[self.rich_tags[i].name] = i
         self._cache = PreshMapArray(self.n_tags)
 
+    def __reduce__(self):
+        return (Morphology, (self.strings, self.tag_map, self.lemmatizer), None, None)
+
     cdef int assign_tag(self, TokenC* token, tag) except -1:
         cdef int tag_id
         if isinstance(tag, basestring):

tests/morphology/test_pickle.py

@@ -0,0 +1,17 @@
+import pytest
+
+import pickle
+import StringIO
+
+
+from spacy.morphology import Morphology
+from spacy.lemmatizer import Lemmatizer
+from spacy.strings import StringStore
+
+
+def test_pickle():
+    morphology = Morphology(StringStore(), {}, Lemmatizer({}, {}, {})) 
+
+    file_ = StringIO.StringIO()
+    pickle.dump(morphology, file_)
+