Try fix tox test py27, 37

.github/workflows/test.yml

@@ -4,7 +4,7 @@ on: [push, pull_request]
 
 jobs:
   build:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       max-parallel: 5
@@ -14,7 +14,17 @@ jobs:
     steps:
     - uses: actions/checkout@v2
 
+    # Special handling for Python 2.7
+    - name: Set up Python 2.7 and pip (+ install dependencies)
+      if: matrix.python-version == '2.7'
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y python2.7 python-pip
+        python2.7 -m pip install --upgrade "pip<21.0" "setuptools<45"
+        python2.7 -m pip install tox==3.24.4 tox-gh-actions
+
     - name: Set up Python ${{ matrix.python-version }}
+      if: matrix.python-version != '2.7'
       uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
@@ -33,7 +43,8 @@ jobs:
         restore-keys: |
           ${{ matrix.python-version }}-v1-
 
-    - name: Install dependencies
+    - name: Install dependencies for Python 3.x
+      if: matrix.python-version != '2.7'
       run: |
         python -m pip install --upgrade pip setuptools
         python -m pip install --upgrade tox tox-gh-actions

authority/admin.py

@@ -12,15 +12,17 @@
 from django.core.exceptions import PermissionDenied
 
 from sys import version_info as python_version
-if django_version[0] >= 4:
+if django_version >= (4, 0):
     from django.utils.encoding import force_str as force_text  # Django 4.x
-elif django_version[0] >= 2:
+elif django_version >= (2, 0):
     from django.utils.encoding import force_text  # Django 2.x and 3.x
-else:
+elif django_version >= (1, 11):
     if python_version[0] < 3:
-        from django.utils.encoding import force_unicode as force_text  # Django 1.x with Python 2.x
+        from django.utils.encoding import force_unicode as force_text # Django 1.x with Python 2.7
     else:
-        raise ImportError("Unsupported Django version or Python version")
+        from django.utils.encoding import force_text
+else:
+    raise ImportError("Unsupported Django version or Python version")
 
 from authority.models import Permission
 from authority.widgets import GenericForeignKeyRawIdWidget

tox.ini

@@ -17,6 +17,7 @@ commands =
     coverage xml
 deps =
     coverage
+    setuptools
     dj111: Django>=1.11,<2.0
     dj22: Django>=2.2,<2.3
     dj30: Django>=3.0,<3.1