[Core] Fix SimpleNamespace on Python2

.travis.yml

@@ -21,12 +21,15 @@ matrix:
   include:
     - name: Unit tests
       env: TOX_ENV=py3
-    - name: Unit tests (libtorrent 1.2)
+    - name: Unit tests - libtorrent 1.2
       env: TOX_ENV=py3
       addons:
         apt:
           sources: [sourceline: "ppa:libtorrent.org/1.2-daily"]
           packages: [python3-libtorrent, python3-venv]
+    - name: Unit tests - Python 2
+      env: TOX_ENV=py27
+      python: 2.7
     - if: commit_message =~ SECURITY_TEST
       env: TOX_ENV=security
     - name: Code linting
@@ -44,6 +47,7 @@ addons:
       - sourceline: "ppa:libtorrent.org/rc-1.1-daily"
       - deadsnakes
     packages:
+      - python-libtorrent
       - python3-libtorrent
       # Install py36 specifically for pre-commit to run black formatter.
       - python3.6

CHANGELOG.md

@@ -1,7 +1,15 @@
 # Changelog
 
+## 2.0.2 (WiP)
+
+### Core
+
+- Fix Python 2 compatiblity issue with SimpleNamespace.
+
 ## 2.0.1 (2019-06-07)
 
+### Packaging
+
 - Fix setup.py build error without git installed.
 
 ## 2.0.0 (2019-06-06)

deluge/core/alertmanager.py

@@ -28,6 +28,14 @@ from deluge.common import decode_bytes
 
 log = logging.getLogger(__name__)
 
+try:
+    SimpleNamespace = types.SimpleNamespace  # Python 3.3+
+except AttributeError:
+
+    class SimpleNamespace(object):  # Python 2.7
+        def __init__(self, **attr):
+            self.__dict__.update(attr)
+
 
 class AlertManager(component.Component):
     """AlertManager fetches and processes libtorrent alerts"""
@@ -126,7 +134,7 @@ class AlertManager(component.Component):
                     if log.isEnabledFor(logging.DEBUG):
                         log.debug('Handling alert: %s', alert_type)
                     # Copy alert attributes
-                    alert_copy = types.SimpleNamespace(
+                    alert_copy = SimpleNamespace(
                         **{
                             attr: getattr(alert, attr)
                             for attr in dir(alert)

docs/source/releases/2.0.md

@@ -6,7 +6,7 @@ Welcome to the latest release of Deluge, a long time in the making!
 
 Some of the highlights since the last major release.
 
-- Migrated to Python 3.
+- Migrated to Python 3 with minimal support retained for Python 2.7.
 - Shiny new logo.
 - Multi-user support.
 - Performance updates to handle thousands of torrents with faster loading times.

setup.py

@@ -591,7 +591,7 @@ setup(
         'Operating System :: POSIX',
         'Topic :: Internet',
     ],
-    python_requires='>=3.5',
+    python_requires='>=2.7',
     license='GPLv3+',
     cmdclass=cmdclass,
     setup_requires=setup_requires,