Remove @Pyro4.behavior(instance_mode='single') (issue #49)

Setting Pyro's instance mode behaviour to 'single' means that a single
instance of the decorated class is created and used for all methods
calls.  This is the same as creating and registering an instance with
the Pyro daemon which is what deviceserver already does.

This commit removes those decorators which are doing nothing.  This
makes the concrete classes independent of Pyro.

Author: carandraug

microscope/cameras/andorsdk3.py

@@ -25,7 +25,6 @@
 import queue
 import time
 
-import Pyro4
 import numpy as np
 
 from microscope import devices
@@ -176,7 +175,7 @@ def wrapper(self, *args, **kwargs):
                        '_aoi_binning', '_aoi_left', '_aoi_top',
                        '_aoi_width', '_aoi_height', ]
 
-@Pyro4.behavior('single')
+
 class AndorSDK3(devices.FloatingDeviceMixin,
                 devices.CameraDevice):
     SDK_INITIALIZED = False

microscope/cameras/pvcam.py

@@ -1178,7 +1178,6 @@ def values(self):
         return values
 
 
-@Pyro4.behavior('single')
 class PVCamera(devices.FloatingDeviceMixin, devices.CameraDevice):
     """Implements the CameraDevice interface for the pvcam library."""
     # Keep track of open cameras.

microscope/cameras/ximea.py

@@ -19,7 +19,6 @@
 ## You should have received a copy of the GNU General Public License
 ## along with Microscope.  If not, see <http://www.gnu.org/licenses/>.
 
-import Pyro4
 import numpy as np
 
 from microscope import devices
@@ -49,8 +48,6 @@
 #    }
 
 
-
-@Pyro4.behavior('single')
 class XimeaCamera(devices.CameraDevice):
     def __init__(self, **kwargs):
         super().__init__(**kwargs)

microscope/testsuite/devices.py

@@ -22,7 +22,6 @@
 import random
 import time
 
-import Pyro4
 import numpy as np
 from PIL import Image, ImageFont, ImageDraw
 
@@ -137,7 +136,6 @@ def sawtooth(self, w, h, dark, light):
         return dark + light * ((np.sin(th)*xx + np.cos(th)*yy) % wrap) / (wrap)
 
 
-@Pyro4.behavior('single')
 class TestCamera(devices.CameraDevice):
     def __init__(self, **kwargs):
         super().__init__(**kwargs)
@@ -381,7 +379,6 @@ def get_current_pattern(self):
         return self._current_pattern
 
 
-@Pyro4.behavior('single')
 class DummySLM(devices.Device):
     def __init__(self, **kwargs):
         super().__init__(**kwargs)
@@ -424,7 +421,6 @@ def get_sequence_index(self):
         return self.sequence_index
 
 
-@Pyro4.behavior('single')
 class DummyDSP(devices.Device):
     def __init__(self, **kwargs):
         super().__init__(**kwargs)