fix travis with Chainerv5

.travis.yml

@@ -5,10 +5,10 @@ python:
   - "2.7"
   - "3.6"
 env:
-  - CHAINER_VERSION=">=4.0" OPTIONAL_MODULES=0
-  - CHAINER_VERSION=">=4.0" OPTIONAL_MODULES=1
-  - CHAINER_VERSION="==5.0.0b1" OPTIONAL_MODULES=0
-  - CHAINER_VERSION="==5.0.0b1" OPTIONAL_MODULES=1
+  - CHAINER_VERSION=">=5.0" OPTIONAL_MODULES=0
+  - CHAINER_VERSION=">=5.0" OPTIONAL_MODULES=1
+  - CHAINER_VERSION="==6.0.0a1" OPTIONAL_MODULES=0
+  - CHAINER_VERSION="==6.0.0a1" OPTIONAL_MODULES=1
 notifications:
   email: false
 

README.md

@@ -42,7 +42,6 @@ The instruction on installation using Anaconda is [here](http://chainercv.readth
 
 For additional features
 
-+ [ChainerMN](https://github.com/chainer/chainermn)
 + Matplotlib
 + OpenCV
 + SciPy

environment.yml

@@ -14,5 +14,3 @@ dependencies:
   - Pillow
   - mpi4py
   - scipy
-  - pip:
-    - chainermn==1.3.0

setup.py

@@ -23,7 +23,7 @@
 
 setup_requires = ['numpy']
 install_requires = [
-    'chainer>=4.0',
+    'chainer>=5.0',
     'Pillow'
 ]
 

tests/links_tests/connection_tests/test_conv_2d_bn_activ.py

@@ -10,13 +10,15 @@
 
 from chainercv.links import Conv2DBNActiv
 
+from chainermn import create_communicator
+
 
 def _add_one(x):
     return x + 1
 
 
 try:
-    from chainermn import create_communicator
+    import mpi4py.MPI  # NOQA
     _available = True
 except ImportError:
     _available = False
@@ -126,7 +128,7 @@ def test_backward_gpu(self):
         self.check_backward(cuda.to_gpu(self.x), cuda.to_gpu(self.gy))
 
 
-@unittest.skipUnless(_available, 'ChainerMN is not installed')
+@unittest.skipUnless(_available, 'mpi4py is not installed')
 class TestConv2DMultiNodeBNActiv(unittest.TestCase):
 
     in_channels = 1

tests/links_tests/model_tests/ssd_tests/test_multibox_loss.py

@@ -12,9 +12,11 @@
 
 from chainercv.links.model.ssd import multibox_loss
 
+from chainermn import create_communicator
+
 
 try:
-    from chainermn import create_communicator
+    import mpi4py.MPI  # NOQA
     _available = True
 except ImportError:
     _available = False
@@ -129,7 +131,7 @@ def test_forward_gpu(self):
             self.k)
 
 
-@unittest.skipUnless(_available, 'ChainerMN is not installed')
+@unittest.skipUnless(_available, 'mpi4py is not installed')
 class TestMultiNodeMultiboxLoss(unittest.TestCase):
 
     k = 3