update code to reflect the new minimum python version 3.7

- update string format method
- remove redundant default arguments from function  calls
- remove unused imports
- remove unicode identifier from strings, it's default in py3 (see: https://stackoverflow.com/a/4182635/12201331)

allianceauth/fleetactivitytracking/admin.py

@@ -1,4 +1,3 @@
-
 from django.contrib import admin
 
 from allianceauth.fleetactivitytracking.models import Fatlink, Fat

allianceauth/fleetactivitytracking/apps.py

@@ -1,4 +1,3 @@
-
 from django.apps import AppConfig
 
 

allianceauth/fleetactivitytracking/forms.py

@@ -1,4 +1,3 @@
-
 from django import forms
 from django.utils.translation import ugettext_lazy as _
 

allianceauth/fleetactivitytracking/migrations/0001_initial.py

@@ -1,5 +1,4 @@
 # Generated by Django 1.10.1 on 2016-09-05 21:39
-from __future__ import unicode_literals
 
 import django.db.models.deletion
 from django.conf import settings
@@ -54,6 +53,6 @@ class Migration(migrations.Migration):
         ),
         migrations.AlterUniqueTogether(
             name='fat',
-            unique_together=set([('character', 'fatlink')]),
+            unique_together={('character', 'fatlink')},
         ),
     ]

allianceauth/fleetactivitytracking/migrations/0002_auto_20160905_2220.py

@@ -1,5 +1,4 @@
 # Generated by Django 1.10.1 on 2016-09-05 22:20
-from __future__ import unicode_literals
 
 import datetime
 from django.db import migrations, models

allianceauth/fleetactivitytracking/migrations/0003_auto_20160906_2354.py

@@ -1,5 +1,4 @@
 # Generated by Django 1.10.1 on 2016-09-06 23:54
-from __future__ import unicode_literals
 
 from django.db import migrations, models
 import django.utils.timezone

allianceauth/fleetactivitytracking/migrations/0004_make_strings_more_stringy.py

@@ -1,5 +1,4 @@
 # Generated by Django 1.10.5 on 2017-03-22 23:35
-from __future__ import unicode_literals
 
 from django.db import migrations, models
 

allianceauth/fleetactivitytracking/views.py

@@ -36,7 +36,7 @@ get_universe_structures_structure_id
 logger = logging.getLogger(__name__)
 
 
-class CorpStat(object):
+class CorpStat:
     def __init__(self, corp_id, start_of_month, start_of_next_month, corp=None):
         if corp:
             self.corp = corp
@@ -53,7 +53,7 @@ class CorpStat(object):
             return "%.2f" % 0
 
 
-class MemberStat(object):
+class MemberStat:
     def __init__(self, member, start_of_month, start_of_next_month, mainchid=None):
         if mainchid:
             self.mainchid = mainchid
@@ -215,7 +215,7 @@ def fatlink_monthly_personal_statistics_view(request, year, month, char_id=None)
         user = EveCharacter.objects.get(character_id=char_id).user
     else:
         user = request.user
-    logger.debug("Personal monthly statistics view for user %s called by %s" % (user, request.user))
+    logger.debug(f"Personal monthly statistics view for user {user} called by {request.user}")
 
     personal_fats = Fat.objects.filter(user=user)\
         .filter(fatlink__fatdatetime__gte=start_of_month).filter(fatlink__fatdatetime__lt=start_of_next_month)
@@ -347,7 +347,7 @@ def modify_fatlink_view(request, fat_hash=None):
     if request.GET.get('removechar', None):
         character_id = request.GET.get('removechar')
         character = EveCharacter.objects.get(character_id=character_id)
-        logger.debug("Removing character %s from fleetactivitytracking  %s" % (character.character_name, fatlink))
+        logger.debug(f"Removing character {character.character_name} from fleetactivitytracking  {fatlink}")
 
         Fat.objects.filter(fatlink=fatlink).filter(character=character).delete()