Allow binds to be specified as a list of strings

Signed-off-by: Aanand Prasad <aanand.prasad@gmail.com>

docker/utils/utils.py

@@ -174,6 +174,9 @@ def convert_port_bindings(port_bindings):
 
 
 def convert_volume_binds(binds):
+    if isinstance(binds, list):
+        return binds
+
     result = []
     for k, v in binds.items():
         if isinstance(v, dict):

docs/volumes.md

@@ -19,3 +19,16 @@ container_id = c.create_container(
     })
 )
 ```
+
+You can alternatively specify binds as a list. This code is equivalent to the
+example above:
+
+```python
+container_id = c.create_container(
+    'busybox', 'ls', volumes=['/mnt/vol1', '/mnt/vol2'],
+    host_config=docker.utils.create_host_config(binds=[
+        '/home/user1/:/mnt/vol2',
+        '/var/www:/mnt/vol1:ro',
+    ])
+)
+```

tests/test.py

@@ -808,6 +808,36 @@ class DockerClientTest(Cleanup, base.BaseTestCase):
             DEFAULT_TIMEOUT_SECONDS
         )
 
+    def test_create_container_with_binds_list(self):
+        try:
+            self.client.create_container(
+                'busybox', 'true', host_config=create_host_config(
+                    binds=[
+                        "/tmp:/mnt/1:ro",
+                        "/tmp:/mnt/2",
+                    ],
+                )
+            )
+        except Exception as e:
+            self.fail('Command should not raise exception: {0}'.format(e))
+
+        args = fake_request.call_args
+        self.assertEqual(args[0][0], url_prefix +
+                         'containers/create')
+        expected_payload = self.base_create_payload()
+        expected_payload['HostConfig'] = create_host_config()
+        expected_payload['HostConfig']['Binds'] = [
+            "/tmp:/mnt/1:ro",
+            "/tmp:/mnt/2",
+        ]
+        self.assertEqual(json.loads(args[1]['data']), expected_payload)
+        self.assertEqual(args[1]['headers'],
+                         {'Content-Type': 'application/json'})
+        self.assertEqual(
+            args[1]['timeout'],
+            DEFAULT_TIMEOUT_SECONDS
+        )
+
     def test_create_container_with_port_binds(self):
         self.maxDiff = None
         try: