p

commit ffbdd14134da551657d5d0f7b30729ce94498b66
Author: Kyle Altendorf <kyle.altendorf@epcpower.com>
Date:   Tue Aug 16 10:25:29 2016 -0400

    Futurized
    
    ```
    pip3 install future
    futurize --both-stages --no-diffs --write --nobackups .
    ```

diff --git a/sunspec/core/client.py b/sunspec/core/client.py
index 3ecf67c..b2d825b 100644
--- a/sunspec/core/client.py
+++ b/sunspec/core/client.py
@@ -1,495 +1,499 @@
 
 """
     Copyright (C) 2016 SunSpec Alliance
 
     Permission is hereby granted, free of charge, to any person obtaining a
     copy of this software and associated documentation files (the "Software"),
     to deal in the Software without restriction, including without limitation
     the rights to use, copy, modify, merge, publish, distribute, sublicense,
     and/or sell copies of the Software, and to permit persons to whom the
     Software is furnished to do so, subject to the following conditions:
 
     The above copyright notice and this permission notice shall be included
     in all copies or substantial portions of the Software.
 
     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
     THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
     IN THE SOFTWARE.
 """
+from __future__ import division
+from builtins import str
+from builtins import object
+from past.utils import old_div
 
 import os
 import time
 import sunspec.core.modbus.client as modbus
 import sunspec.core.device as device
 import sunspec.core.util as util
 import sunspec.core.suns as suns
 from sunspec.core.util import SunSpecError
 
 RTU = 'RTU'
 TCP = 'TCP'
 MAPPED = 'Mapped'
 
 PARITY_NONE = modbus.PARITY_NONE
 PARITY_EVEN = modbus.PARITY_EVEN
 
 class SunSpecClientError(SunSpecError):
     pass
 
 class ClientDevice(device.Device):
 
     def __init__(self, device_type, slave_id=None, name=None, pathlist = None, baudrate=None, parity=None, ipaddr=None, ipport=None,
                  timeout=None, trace=False):
 
         device.Device.__init__(self, addr=None)
 
         self.type = device_type
         self.name = name
         self.pathlist = pathlist
         self.slave_id = slave_id
         self.modbus_device = None
         self.retry_count = 2
         self.base_addr_list = [40000, 0, 50000]
 
         try:
             if device_type == RTU:
                 self.modbus_device = modbus.ModbusClientDeviceRTU(slave_id, name, baudrate, parity, timeout, self, trace)
             elif device_type == TCP:
                 self.modbus_device = modbus.ModbusClientDeviceTCP(slave_id, ipaddr, ipport, timeout, self, trace)
             elif device_type == MAPPED:
                 if name is not None:
                     self.modbus_device = modbus.ModbusClientDeviceMapped(slave_id, name, pathlist, self)
                 else:
                     if self.modbus_device is not None:
                         self.modbus_device.close()
                     raise SunSpecClientError('Map file required for mapped device')
-        except modbus.ModbusClientError, e:
+        except modbus.ModbusClientError as e:
             if self.modbus_device is not None:
                 self.modbus_device.close()
             raise SunSpecClientError('Modbus error: %s' % str(e))
 
     def close(self):
 
         if self.modbus_device is not None:
             self.modbus_device.close()
 
     def read(self, addr, count):
         try:
             if self.modbus_device is not None:
                 return self.modbus_device.read(addr, count)
             else:
                 raise SunSpecClientError('No modbus device set for SunSpec device')
-        except modbus.ModbusClientError, e:
+        except modbus.ModbusClientError as e:
             raise SunSpecClientError('Modbus read error: %s' % str(e))
 
     def write(self, addr, data):
 
         try:
             if self.modbus_device is not None:
                 return self.modbus_device.write(addr, data)
             else:
                 raise SunSpecClientError('No modbus device set for SunSpec device')
-        except modbus.ModbusClientError, e:
+        except modbus.ModbusClientError as e:
             raise SunSpecClientError('Modbus write error: %s' % str(e))
 
     def read_points(self):
 
         for model in self.models_list:
             model.read_points()
 
     def scan(self, progress=None, delay=None):
 
         error = ''
 
         connect = False
         if self.modbus_device and type(self.modbus_device) == modbus.ModbusClientDeviceTCP:
             self.modbus_device.connect()
             connect = True
 
             if delay is not None:
                 time.sleep(delay)
 
         if self.base_addr is None:
             for addr in self.base_addr_list:
                 # print 'trying base address %s' % (addr)
                 try:
                     data = self.read(addr, 3)
 
                     if data[:4] == 'SunS':
                         self.base_addr = addr
                         # print 'device base address = %d' % self.base_addr
                         break
                     else:
                         error = 'Device responded - not SunSpec register map'
-                except SunSpecClientError, e:
+                except SunSpecClientError as e:
                     if not error:
                         error = str(e)
 
                 if delay is not None:
                     time.sleep(delay)
 
         if self.base_addr is not None:
             # print 'base address = %s' % (self.base_addr)
             model_id = util.data_to_u16(data[4:6])
             addr = self.base_addr + 2
 
             while model_id != suns.SUNS_END_MODEL_ID:
                 # read model and model len separately due to some devices not supplying
                 # count for the end model id
                 data = self.read(addr + 1, 1)
                 if data and len(data) == 2:
                     if progress is not None:
                         cont = progress('Scanning model %s' % (model_id))
                         if not cont:
                             raise SunSpecClientError('Device scan terminated')
                     model_len = util.data_to_u16(data)
                     # print 'model_id = %s  model_len = %s' % (model_id, model_len)
 
                     # move address past model id and length
                     model = ClientModel(self, model_id, addr + 2, model_len)
                     # print 'loading model %s at %d' % (model_id, addr + 2)
                     try:
                         model.load()
-                    except Exception, e:
+                    except Exception as e:
                         model.load_error = str(e)
                     self.add_model(model)
 
                     addr += model_len + 2
                     data = self.read(addr, 1)
                     if data and len(data) == 2:
                         model_id = util.data_to_u16(data)
                     else:
                         break
                 else:
                     break
 
                 if delay is not None:
                     time.sleep(delay)
 
         else:
             if not error:
                 error = 'Unknown error'
             raise SunSpecClientError(error)
 
         if connect:
             self.modbus_device.disconnect()
 
 class ClientModel(device.Model):
 
     def __init__(self, dev=None, mid=None, addr=0, mlen=None, index=1):
 
         device.Model.__init__(self, device=dev, mid=mid, addr=addr, mlen=mlen, index=index)
 
     def load(self):
 
         device.Model.load(self, block_class=ClientBlock, point_class=ClientPoint)
 
     def read_points(self):
 
         if self.model_type is not None:
             # read current model
             try:
                 end_index = len(self.read_blocks)
                 if end_index == 1:
                     data = self.device.read(self.addr, self.len)
                 else:
                     data = ''
                     index = 0
                     while index < end_index:
                         addr = self.read_blocks[index]
                         index += 1
                         if index < end_index:
                             read_len = self.read_blocks[index] - addr
                         else:
                             read_len = self.addr + self.len - addr
                         data += self.device.read(addr, read_len)
                 if data:
                     # print 'data len = ', len(data)
-                    data_len = len(data)/2
+                    data_len = old_div(len(data),2)
                     if data_len != self.len:
                         raise SunSpecClientError('Error reading model %s' % self.model_type)
 
                     #  for each repeating block
                     for block in self.blocks:
                         # scale factor points
-                        for pname, point in block.points_sf.iteritems():
+                        for pname, point in block.points_sf.items():
                             offset = int(point.addr) - int(self.addr)
                             if point.point_type.data_to is not None:
                                 byte_offset = offset * 2
                                 # print pname, point, offset, byte_offset, (byte_offset + (int(point.point_type.len) * 2)), point.point_type.len
                                 point.value_base = point.point_type.data_to(data[byte_offset:byte_offset + (int(point.point_type.len) * 2)])
                                 if not point.point_type.is_impl(point.value_base):
                                     point.value_base = None
                             else:
                                 raise SunSpecClientError('No data_to function set for %s : %s' % (pname, point.point_type))
 
                         # non-scale factor points
-                        for pname, point in block.points.iteritems():
+                        for pname, point in block.points.items():
                             offset = int(point.addr) - int(self.addr)
                             if point.point_type.data_to is not None:
                                 byte_offset = offset * 2
                                 # print pname, point, offset, byte_offset, (byte_offset + (int(point.point_type.len) * 2)), point.point_type.len
                                 point.value_base = point.point_type.data_to(data[byte_offset:byte_offset + (int(point.point_type.len) * 2)])
                                 if point.point_type.is_impl(point.value_base):
                                     if point.sf_point is not None:
                                         point.value_sf = point.sf_point.value_base
                                 else:
                                     point.value_base = None
                                     point.value_sf = None
                             else:
                                 raise SunSpecClientError('No data_to function set for %s : %s' % (pname, point.point_type))
 
-            except SunSpecError, e:
+            except SunSpecError as e:
                 raise SunSpecClientError(e)
-            except modbus.ModbusClientError, e:
+            except modbus.ModbusClientError as e:
                 raise SunSpecClientError('Modbus error: %s' % str(e))
             except:
                 raise
 
     def write_points(self):
 
         addr = None
         next_addr = None
         data = ''
 
         for block in self.blocks:
             for point in block.points_list:
                 if point.dirty:
                     point_addr = int(point.addr)
                     point_len = int(point.point_type.len)
                     point_data = point.point_type.to_data(point.value_base, (point_len * 2))
                     if addr is None:
                         addr = point_addr
                         data = ''
                     else:
                         if point_addr != next_addr:
                             block.model.device.write(addr, data)
                             addr = point_addr
                             data = ''
                     next_addr = point_addr + point_len
                     data += point_data
                     point.dirty = False
             if addr is not None:
                 block.model.device.write(addr, data)
                 addr = None
 
 class ClientBlock(device.Block):
 
     def __init__(self, model, addr, blen, block_type, index=1):
 
         device.Block.__init__(self, model, addr, blen, block_type, index)
 
 class ClientPoint(device.Point):
 
     def __init__(self, block=None, point_type=None, addr=None, sf_point=None, value=None):
 
         device.Point.__init__(self, block, point_type, addr, sf_point, value)
 
     def write(self):
 
         data = self.point_type.to_data(self.value_base, (int(self.point_type.len) * 2))
         self.block.model.device.write(int(self.addr), data)
         self.dirty = False
 
 class SunSpecClientModelBase(object):
 
     def __init__(self, model, name):
         self.model = model
         self.name = name
         self.repeating = [None]
         self.repeating_name = 'repeating'
 
         if len(model.blocks) > 1:
             block_class_name = self.__class__.__name__ + 'Repeating'
             for block in model.blocks[1:]:
                 # set repeating block name and attribute if present
                 if block.block_type.name != self.repeating_name:
                     self.repeating_name = block.block_type.name
                     setattr(self, self.repeating_name, self.repeating)
                 # block_class_ = globals().get(block_class_name)
                 block_class = globals().get(block_class_name)
                 c = block_class(block, self.repeating_name)
                 self.repeating.append(c)
 
     def _get_property(self, name):
         point = self.model.points.get(name)
         if point:
             return point.value
 
     def _set_property(self, name, value):
         point = self.model.points.get(name)
         if point:
             point.value = value
 
     def __getitem__(self, name):
         return self._get_property(name)
         # return self.__dict__.get(key, None)
 
     def __setitem__(self, name, item):
         return self._set_property(name, item)
         # self.__dict__.set(key, item)
 
     def read(self):
         self.model.read_points()
 
     def write(self):
         self.model.write_points()
 
     def __str__(self):
         s = '\n%s (%s):\n' % (self.name, self.model.id)
         for name in self.points:
             value = getattr(self, name)
             if value is not None:
                 s += '%s:  %s\n' % (name, str(value))
 
         for block in self.repeating[1:]:
             s += str(block)
 
         return s
 
 class SunSpecClientBlockBase(object):
 
     def __init__(self, block, name):
         self.block = block
         self.name = name
 
     def _get_property(self, name):
         point = self.block.points.get(name)
         if point:
             return point.value
 
     def _set_property(self, name, value):
         point = self.block.points.get(name)
         if point:
             point.value = value
 
     def __getitem__(self, key):
         return self._get_property(name)
         # return self.__dict__.get(key, None)
 
     def __setitem__(self, key, item):
         return self._set_property(name, item)
         # self.__dict__.set(key, item)
 
     def __str__(self):
         s = '\n%s[%d]:\n' % (self.name, self.block.index)
         for name in self.points:
             value = getattr(self, name)
             if value is not None:
                 s += '%s:  %s\n' % (name, str(value))
 
         return s
 
 def model_class_get(model_id):
 
     def add_property(self, name, value):
         fget = lambda self: self._get_property(name)
         fset = lambda self, value: self._set_property(name, value)
         setattr(self, name, property(fget, fset))
 
     def class_init(self, model, name):
         SunSpecClientModelBase.__init__(self, model, name)
 
     def block_class_init(self, block, name):
         SunSpecClientBlockBase.__init__(self, block, name)
 
     class_name = 'Model' + str(model_id)
     class_ = globals().get(class_name)
     if class_ is None:
         class_ = type(class_name, (SunSpecClientModelBase,), {'__init__' : class_init})
         globals()[class_name] = class_
 
     setattr(class_, 'points', [])
     model_type = None
     try:
         model_type = device.model_type_get(model_id)
-    except Exception, e:
+    except Exception as e:
         setattr(class_, 'load_error', str(e))
     if model_type is not None:
         for point_type in model_type.fixed_block.points_list:
             if point_type.type != suns.SUNS_TYPE_SUNSSF and point_type.type != suns.SUNS_TYPE_PAD:
                 add_property(class_, point_type.id, None)
                 class_.points.append(point_type.id)
             ### check for writable point?
 
         block_type = model_type.repeating_block
         if block_type is not None:
             block_class_name = class_name + 'Repeating'
             block_class = type(block_class_name, (SunSpecClientBlockBase,), {'__init__' : block_class_init})
             globals()[block_class_name] = block_class
 
             setattr(block_class, 'points', [])
             for point_type in block_type.points_list:
                 if point_type.type != suns.SUNS_TYPE_SUNSSF and point_type.type != suns.SUNS_TYPE_PAD:
                     add_property(block_class, point_type.id, None)
                     block_class.points.append(point_type.id)
 
     return class_
 
 class SunSpecClientDevice(object):
 
     def __init__(self, device_type, slave_id=None, name=None, pathlist = None, baudrate=None, parity=None, ipaddr=None, ipport=None,
                  timeout=None, trace=False, scan_progress=None, scan_delay=None):
 
         # super(self.__class__, self).__init__(device_type, slave_id, name, pathlist, baudrate, parity, ipaddr, ipport)
         self.device = ClientDevice(device_type, slave_id, name, pathlist, baudrate, parity, ipaddr, ipport, timeout, trace)
         self.models = []
 
         try:
             # scan device models
             self.device.scan(progress=scan_progress, delay=scan_delay)
 
             # create named attributes for each model
             for model in self.device.models_list:
                 model_id = str(model.id)
                 c = model_class_get(model_id)
                 if model.model_type is not None:
                     name = model.model_type.name
                 else:
                     name = 'model_' + model_id
                 model_class = c(model, name)
                 existing = getattr(self, name, None)
                 # if model id already defined
                 if existing:
                     # if model id definition is not a list, turn it into a list and add existing model
                     if type(self[name]) is not list:
                         # model instance index starts at 1 so first first list element is None
                         setattr(self, name, [None])
                         self[name].append(existing)
                     # add new model to the list
                     self[name].append(model_class)
                 # if first model id instance, set attribute as model
                 else:
                     setattr(self, name, model_class)
                     self.models.append(name)
-        except Exception, e:
+        except Exception as e:
             if self.device is not None:
                 self.device.close()
             raise
 
     def close(self):
         self.device.close()
 
     def read(self):
         self.device.read_points()
 
     def __getitem__(self, key):
         return self.__dict__.get(key, None)
 
     def __setitem__(self, key, item):
         self.__dict__.set(key, item)
 
     def __str__(self):
 
         s = ''
         for model in self.models:
             s += str(self[model])
 
         return s
 
 if __name__ == "__main__":
 
     pass