basic python 3 support (dronekit#655)

* basic python 3 support

* pyenv support

* test python 2 and 3 on travis

* test py 2.7 3.5 on circleci

* debug travis nose tests

* install to virtualenv

Author: mrpollo

.gitignore

@@ -1,5 +1,6 @@
 .project
 .pydevproject
+.python-version
 dronekit.egg-info
 dist
 build

.travis.yml

@@ -5,19 +5,19 @@ env:
 
 python:
   - "2.7"
+  - "3.5"
 
 install:
-  - 'sudo pip install . -UI'
-  - 'sudo pip install -r requirements.txt -UI'
+  - 'pip install -r requirements.txt'
 
 script:
-  - 'nosetests -svx dronekit.test.unit'
-  - 'nosetests -svx dronekit.test.sitl'
+  - 'nosetests --debug=nose,nose.importer --debug-log=nose_debug -svx dronekit.test.unit'
+  - 'nosetests --debug=nose,nose.importer --debug-log=nose_debug -svx dronekit.test.sitl'
 
 git:
   depth: 10
 
-language: objective-c
+language: python
 
 notifications:
   email: false
@@ -34,6 +34,3 @@ matrix:
 branches:
   only:
     - master
-    - patch
-    - major
-    - minor

circle.yml

@@ -1,4 +1,6 @@
 machine:
+  post:
+    - pyenv global 2.7.10 3.5.0
   environment:
     SITL_SPEEDUP: 10
     SITL_RATE: 200

dronekit/__init__.py

@@ -40,7 +40,7 @@
 import re
 from dronekit.util import errprinter
 from pymavlink import mavutil, mavwp
-from Queue import Queue, Empty
+from queue import Queue, Empty
 from threading import Thread
 import types
 import threading
@@ -1208,7 +1208,7 @@ def listener(self, name, msg):
         def listener(self, name, msg):
             self._home_location = LocationGlobal(msg.latitude/1.0e7, msg.longitude/1.0e7, msg.altitude/1000.0);
             self.notify_attribute_listeners('home_location', self.home_location, cache=True)
-            
+
         @self.on_message(['WAYPOINT', 'MISSION_ITEM'])
         def listener(self, name, msg):
             if not self._wp_loaded:
@@ -1530,10 +1530,10 @@ def _mode_mapping_bynumber(self):
         return mavutil.mode_mapping_bynumber(self._vehicle_type)
 
     def _is_mode_available(self, custommode_code, basemode_code=0):
-        try:                       
-            if self._autopilot_type == mavutil.mavlink.MAV_AUTOPILOT_PX4:                
+        try:
+            if self._autopilot_type == mavutil.mavlink.MAV_AUTOPILOT_PX4:
                 mode = mavutil.interpret_px4_mode(basemode_code, custommode_code)
-                return mode in self._mode_mapping                
+                return mode in self._mode_mapping
             return custommode_code in self._mode_mapping_bynumber
         except:
             return False
@@ -1553,7 +1553,7 @@ def mode(self):
 
     @mode.setter
     def mode(self, v):
-        if self._autopilot_type == mavutil.mavlink.MAV_AUTOPILOT_PX4: 
+        if self._autopilot_type == mavutil.mavlink.MAV_AUTOPILOT_PX4:
             self._master.set_mode(v.name)
         else:
             self._master.set_mode(self._mode_mapping[v.name])

dronekit/mavlink.py

@@ -11,7 +11,7 @@
 from dronekit import APIException
 from dronekit.util import errprinter
 from pymavlink import mavutil, mavwp
-from Queue import Queue, Empty
+from queue import Queue, Empty
 from threading import Thread
 import types
 

requirements.txt

@@ -1,5 +1,6 @@
 pymavlink==2.0.6
 monotonic==1.2
+future==0.15.2
 nose==1.3.7
 mock==2.0.0
 dronekit-sitl==3.1.0

setup.py

@@ -12,7 +12,8 @@
       author='3D Robotics',
       install_requires=[
           'pymavlink==2.0.6',
-          'monotonic==1.2'
+          'monotonic==1.2',
+          'future==0.15.2'
       ],
       author_email='[email protected], [email protected]',
       classifiers=[