future imports and remove unicode strings

adds from __future__ import unicode_literals, absolute_import, division, print_function to all files, removes unicode strings from RTD conf.py (none other were found in our codebase)

See also https://docs.djangoproject.com/en/1.11/topics/python3/#unicode-literals

fixes #290

tested locally in docker

db/api/filters.py

@@ -1,3 +1,6 @@
+from __future__ import absolute_import, division, print_function, \
+    unicode_literals
+
 import django_filters
 from django_filters import rest_framework as filters
 from django_filters.rest_framework import FilterSet

db/api/pagination.py

@@ -1,6 +1,8 @@
 """
 Custom pagination classes for REST framework
 """
+from __future__ import absolute_import, division, print_function, \
+    unicode_literals
 
 from rest_framework.pagination import PageNumberPagination
 from rest_framework.response import Response

db/api/serializers.py

@@ -1,3 +1,6 @@
+from __future__ import absolute_import, division, print_function, \
+    unicode_literals
+
 from rest_framework import serializers
 
 from db.base.models import TRANSMITTER_STATUS, DemodData, Mode, Satellite, \

db/api/tests.py

@@ -1,3 +1,6 @@
+from __future__ import absolute_import, division, print_function, \
+    unicode_literals
+
 import pytest
 from django.test import TestCase
 from rest_framework import status

db/api/urls.py

@@ -1,3 +1,6 @@
+from __future__ import absolute_import, division, print_function, \
+    unicode_literals
+
 from rest_framework import routers
 
 from db.api import views

db/api/views.py

@@ -1,3 +1,6 @@
+from __future__ import absolute_import, division, print_function, \
+    unicode_literals
+
 from django.core.files.base import ContentFile
 from rest_framework import mixins, status, viewsets
 from rest_framework.parsers import FileUploadParser, FormParser

db/base/admin.py

@@ -1,3 +1,6 @@
+from __future__ import absolute_import, division, print_function, \
+    unicode_literals
+
 import logging
 from datetime import datetime
 from socket import error as socket_error

db/base/context_processors.py

@@ -1,3 +1,6 @@
+from __future__ import absolute_import, division, print_function, \
+    unicode_literals
+
 from django.conf import settings
 from django.template.loader import render_to_string
 from satnogsdecoders import __version__ as satnogsdecoders_version

db/base/forms.py

@@ -1,3 +1,6 @@
+from __future__ import absolute_import, division, print_function, \
+    unicode_literals
+
 from django import forms
 from django.core.exceptions import ValidationError
 from django.utils.translation import ugettext_lazy as _

db/base/helpers.py

@@ -1,3 +1,6 @@
+from __future__ import absolute_import, division, print_function, \
+    unicode_literals
+
 from django.core.cache import cache
 from rest_framework.authtoken.models import Token
 

db/base/management/commands/decode_data.py

@@ -1,3 +1,6 @@
+from __future__ import absolute_import, division, print_function, \
+    unicode_literals
+
 from django.core.management.base import BaseCommand
 
 from db.base.models import DemodData, Satellite, Telemetry

db/base/management/commands/delete_satellite.py

@@ -1,3 +1,6 @@
+from __future__ import absolute_import, division, print_function, \
+    unicode_literals
+
 from django.core.management.base import BaseCommand
 
 from db.base.models import Satellite

db/base/management/commands/fetch_data.py

@@ -1,3 +1,6 @@
+from __future__ import absolute_import, division, print_function, \
+    unicode_literals
+
 from datetime import datetime, timedelta
 
 import requests

db/base/management/commands/fetch_satellites.py

@@ -1,3 +1,6 @@
+from __future__ import absolute_import, division, print_function, \
+    unicode_literals
+
 from django.core.management.base import BaseCommand
 
 from db.base.tasks import update_satellite

db/base/management/commands/initialize.py

@@ -1,3 +1,6 @@
+from __future__ import absolute_import, division, print_function, \
+    unicode_literals
+
 from django.core.management import call_command
 from django.core.management.base import BaseCommand
 

db/base/management/commands/update_all_tle.py

@@ -1,3 +1,6 @@
+from __future__ import absolute_import, division, print_function, \
+    unicode_literals
+
 from django.core.management.base import BaseCommand
 
 from db.base.tasks import update_all_tle

db/base/models.py

@@ -1,3 +1,6 @@
+from __future__ import absolute_import, division, print_function, \
+    unicode_literals
+
 import json
 import logging
 from os import path

db/base/tasks.py

@@ -1,3 +1,6 @@
+from __future__ import absolute_import, division, print_function, \
+    unicode_literals
+
 import csv
 import logging
 from datetime import datetime, timedelta

db/base/templatetags/tags.py

@@ -1,3 +1,6 @@
+from __future__ import absolute_import, division, print_function, \
+    unicode_literals
+
 from django import template
 from django.urls import reverse
 from django.utils.html import format_html

db/base/tests.py

@@ -1,3 +1,6 @@
+from __future__ import absolute_import, division, print_function, \
+    unicode_literals
+
 import random
 from datetime import datetime, timedelta
 

db/base/urls.py

@@ -1,3 +1,6 @@
+from __future__ import absolute_import, division, print_function, \
+    unicode_literals
+
 from django.conf.urls import url
 
 from db.base import views

db/base/utils.py

@@ -1,3 +1,6 @@
+from __future__ import absolute_import, division, print_function, \
+    unicode_literals
+
 import binascii
 import logging
 from datetime import datetime, timedelta

db/base/views.py

@@ -1,3 +1,6 @@
+from __future__ import absolute_import, division, print_function, \
+    unicode_literals
+
 import logging
 
 from _mysql_exceptions import OperationalError

db/celery.py

@@ -1,4 +1,5 @@
-from __future__ import absolute_import
+from __future__ import absolute_import, division, print_function, \
+    unicode_literals
 
 import os
 

db/settings.py

@@ -1,3 +1,6 @@
+from __future__ import absolute_import, division, print_function, \
+    unicode_literals
+
 import sentry_sdk
 from decouple import Csv, config
 from dj_database_url import parse as db_url

db/urls.py

@@ -1,3 +1,6 @@
+from __future__ import absolute_import, division, print_function, \
+    unicode_literals
+
 from allauth import urls as allauth_urls
 from django.conf import settings
 from django.conf.urls import include, url

db/wsgi.py

@@ -1,4 +1,7 @@
 #!/usr/bin/env python
+from __future__ import absolute_import, division, print_function, \
+    unicode_literals
+
 import os
 
 from django.core.wsgi import get_wsgi_application

docs/conf.py

@@ -11,7 +11,7 @@
 #
 # All configuration values have a default; values that are commented out
 # serve to show the default.
-
+from __future__ import unicode_literals, absolute_import, division, print_function
 import time
 import sys
 import os
@@ -44,8 +44,8 @@ source_suffix = '.rst'
 master_doc = 'index'
 
 # General information about the project.
-project = u'satnogs-db'
-copyright = u'2014-%s, Libre Space Foundation' % time.strftime('%Y')
+project = 'satnogs-db'
+copyright = '2014-%s, Libre Space Foundation' % time.strftime('%Y')
 author = 'SatNOGS'
 
 # The version info for the project you're documenting, acts as replacement for
@@ -198,7 +198,7 @@ latex_elements = {
 # (source start file, target name, title,
 #  author, documentclass [howto, manual, or own class]).
 latex_documents = [
-  (master_doc, 'satnogs-db.tex', u'satnogs-db Documentation',
+  (master_doc, 'satnogs-db.tex', 'satnogs-db Documentation',
    author, 'manual'),
 ]
 
@@ -228,7 +228,7 @@ latex_documents = [
 # One entry per manual page. List of tuples
 # (source start file, name, description, authors, manual section).
 man_pages = [
-    (master_doc, 'satnogs-db', u'satnogs-db Documentation',
+    (master_doc, 'satnogs-db', 'satnogs-db Documentation',
      [author], 1)
 ]
 
@@ -242,7 +242,7 @@ man_pages = [
 # (source start file, target name, title, author,
 #  dir menu entry, description, category)
 texinfo_documents = [
-  (master_doc, 'satnogs-db', u'satnogs-db Documentation',
+  (master_doc, 'satnogs-db', 'satnogs-db Documentation',
    author, 'SatNOGS', 'An hollistic, unified, global transmitter database for all satellite transmitters.',
    'Miscellaneous'),
 ]

manage.py

@@ -1,4 +1,7 @@
 #!/usr/bin/env python
+from __future__ import absolute_import, division, print_function, \
+    unicode_literals
+
 import os
 import sys
 

setup.py

@@ -1,4 +1,5 @@
-from __future__ import absolute_import, division, print_function
+from __future__ import absolute_import, division, print_function, \
+    unicode_literals
 
 from setuptools import setup