Python files style cleanup (#281)

* Remove unused imports in python files

* Add black and isort dependencies

Also added pyproject.toml for isort config, but later can be used to
configure various other python tools

* Add flake8 in requirements.txt

* Add py-linter workflow

.github/workflows/py-linter.yml

@@ -0,0 +1,32 @@
+name: Python Lint
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+    paths:
+      - '**.py'
+
+jobs:
+  run-linters:
+    name: Run linters
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v4
+        with:
+          python-version: '3.10'
+          cache: pip
+      - run: pip install black==22.8.0 flake8==5.0.4 isort==5.10.1
+      - name: Run linters
+        uses: wearerequired/lint-action@v2
+        with:
+          auto_fix: true
+          black: true
+          flake8: true
+          # Flake8 doesn't support auto-fixing
+          flake8_auto_fix: false

api/messages.py

@@ -2,7 +2,6 @@ from decouple import config
 from secrets import token_urlsafe
 from api.models import Order
 from api.utils import get_session
-import time
 
 class Telegram():
     ''' Simple telegram messages by requesting to API'''

api/serializers.py

@@ -1,4 +1,3 @@
-from django.template.defaultfilters import default
 from rest_framework import serializers
 from .models import MarketTick, Order
 from decouple import config

api/urls.py

@@ -1,6 +1,6 @@
 from django.urls import path
 from .views import MakerView, OrderView, UserView, BookView, InfoView, RewardView, PriceView, LimitView, HistoricalView, TickView, StealthView
-from drf_spectacular.views import SpectacularAPIView, SpectacularRedocView, SpectacularSwaggerView
+from drf_spectacular.views import SpectacularAPIView, SpectacularRedocView
 from chat.views import ChatView
 
 urlpatterns = [

api/views.py

@@ -1,10 +1,6 @@
-import os
-from re import T
 from django.db.models import Sum, Q
-from drf_spectacular.types import OpenApiTypes
-from drf_spectacular.utils import OpenApiExample, OpenApiParameter, extend_schema
+from drf_spectacular.utils import extend_schema
 from rest_framework import status, viewsets
-from rest_framework.exceptions import bad_request
 from rest_framework.generics import CreateAPIView, ListAPIView, UpdateAPIView
 from rest_framework.views import APIView
 from rest_framework.response import Response

pyproject.toml

@@ -0,0 +1,2 @@
+[tool.isort]
+profile = "black"

requirements.txt

@@ -29,3 +29,7 @@ python-gnupg==0.4.9
 daphne==3.0.2
 drf-spectacular==0.24.0
 drf-spectacular-sidecar==2022.9.1
+black==22.8.0
+isort==5.10.1
+flake8==5.0.4
+pyflakes==2.5.0