remove annoy dependency

Annoy currently doesn't build on windows ("fatal error C1083:
Cannot open include file: 'unistd.h': No such file or directory").
Make optional

Author: benfred

.travis.yml

@@ -15,7 +15,7 @@ before_install:
   - pip install -U pip setuptools wheel
 
 install:
-  - travis_wait travis_retry pip install -r requirements.txt flake8 isort cpplint
+  - travis_wait travis_retry pip install -r requirements.txt flake8 isort cpplint annoy
   - travis_retry python setup.py build install
 
 script:

implicit/__init__.py

@@ -3,6 +3,6 @@
 from . import nearest_neighbours
 from . import als
 
-__version__ = '0.2.4'
+__version__ = '0.2.5'
 
 __all__ = [alternating_least_squares, als, nearest_neighbours, __version__]

implicit/annoy_als.py

@@ -2,12 +2,19 @@
 approximate neighbours from an ALS Matrix factorization model
 """
 import itertools
+import logging
 
-import annoy
 import numpy
 
 from implicit.als import AlternatingLeastSquares
 
+try:
+    import annoy
+    has_annoy = True
+except ImportError:
+    has_annoy = False
+    logging.warning("Annoy isn't installed")
+
 
 class MaximumInnerProductIndex(object):
     """ This class uses an Annoy Index to return the top related items by

requirements.txt

@@ -1,3 +1,2 @@
 scipy>=0.16.0
 Cython>=0.22.0
-annoy>=1.8.0

setup.py

@@ -7,7 +7,7 @@
 from setuptools import Extension, setup
 
 NAME = 'implicit'
-VERSION = '0.2.4'
+VERSION = '0.2.5'
 SRC_ROOT = 'implicit'
 
 try:

tests/annoy_als_test.py

@@ -2,15 +2,16 @@
 
 import unittest
 
-from implicit.annoy_als import AnnoyAlternatingLeastSquares
+from implicit.annoy_als import AnnoyAlternatingLeastSquares, has_annoy
 
 from .recommender_base_test import TestRecommenderBaseMixin
 
-
-class AnnoyALSTest(unittest.TestCase, TestRecommenderBaseMixin):
-    def _get_model(self):
-        return AnnoyAlternatingLeastSquares(factors=3, regularization=0)
-
+if has_annoy:
+    # Annoyingly, 'annoy' doesn't seem to build on windows
+    # don't bother testing with this
+    class AnnoyALSTest(unittest.TestCase, TestRecommenderBaseMixin):
+        def _get_model(self):
+            return AnnoyAlternatingLeastSquares(factors=3, regularization=0)
 
 if __name__ == "__main__":
     unittest.main()

tox.ini

@@ -3,7 +3,9 @@ envlist = py27, py35, style
 
 [testenv]
 commands = {envpython} setup.py test
-deps = -rrequirements.txt
+deps =
+    -rrequirements.txt
+    annoy
 
 [testenv:style]
 deps =