fix some code style errors

app/routes.py

@@ -1,12 +1,12 @@
+import json
+import qrcode
 from flask import render_template, flash, redirect, url_for, request, abort, send_file
 from flask_login import login_user, logout_user, current_user, login_required
 from sqlalchemy import and_
+from io import BytesIO
 from app import app, db
 from app.models import Player, Game, Role, GamePlayer, Objective, ObjectiveMinimalEncoder, LocationEncoder
 from app.forms import LoginForm, RegistrationForm, CreateGameForm, ObjectiveForm, PlayerAddForm, PlayerCreateForm, PlayerUpdateForm
-import json
-import qrcode
-from io import BytesIO
 
 @app.route('/')
 @app.route('/index')
@@ -67,15 +67,17 @@ def create_game():
 @login_required
 def game_dashboard(game_name):
     #game = Game.query.filter(Game.game_players.any(and_(GamePlayer.player.has(Player.name == current_user.name), GamePlayer.role == 'owner'))).first_or_404()
-    game = Game.query.filter_by(name = game_name).first_or_404()
+    game = Game.query.filter_by(name=game_name).first_or_404()
-    if not is_game_owner(game): abort(403)
+    if not is_game_owner(game): 
+        abort(403)
     return render_template('game_dashboard.html', title = 'Game Dashboard', game=game, json=json, objective_encoder=ObjectiveMinimalEncoder, location_encoder=LocationEncoder)
 
 @app.route('/game/<game_name>/addplayer', methods=['GET', 'POST'])
 @login_required
 def add_player(game_name):
     game = Game.query.filter_by(name=game_name).first_or_404()
-    if not is_game_owner(game): abort(403)
+    if not is_game_owner(game): 
+        abort(403)
     form_add = PlayerAddForm()
     form_create = PlayerCreateForm()
 
@@ -97,7 +99,8 @@ def add_player(game_name):
 @login_required
 def remove_player(game_name, player_name):
     game = Game.query.filter_by(name=game_name).first_or_404()
-    if not is_game_owner(game): abort(403)
+    if not is_game_owner(game): 
+        abort(403)
     player = Player.query.filter(and_(Player.name == player_name, Player.games.contains(game))).first_or_404()
     game.players.remove(player)
     db.session.commit()
@@ -107,7 +110,8 @@ def remove_player(game_name, player_name):
 @login_required
 def game_player(game_name, player_name):
     game = Game.query.filter_by(name=game_name).first_or_404()
-    if not is_game_owner(game): abort(403)
+    if not is_game_owner(game): 
+        abort(403)
     player = Player.query.filter(and_(Player.name == player_name, Player.games.contains(game))).first_or_404()
     gameplayer = [gameplayer for gameplayer in player.player_games if gameplayer.game == game][0]
     form = PlayerUpdateForm(role=gameplayer.role.name)
@@ -120,9 +124,10 @@ def game_player(game_name, player_name):
 @app.route('/player/<auth_hash>/qrcode.png')
 @login_required
 def player_qrcode(auth_hash):
-    player = Player.query.filter_by(auth_hash = auth_hash).first_or_404()
+    player = Player.query.filter_by(auth_hash=auth_hash).first_or_404()
-    if not is_player_game_owner(player): abort(403)
+    if not is_player_game_owner(player): 
-    img = generate_qr_code(url_for('objective', objective_hash=objective.hash, _external=True))
+        abort(403)
+    img = generate_qr_code(url_for('player', auth_hash=auth_hash, _external=True))
     return serve_pil_image(img)
 
 def is_game_owner(game):
@@ -137,8 +142,9 @@ def is_objective_owner(objective):
 @app.route('/game/<game_name>/add_objective', methods=['GET', 'POST'])
 @login_required
 def add_objective(game_name):
-    game = Game.query.filter_by(name = game_name).first_or_404()
+    game = Game.query.filter_by(name=game_name).first_or_404()
-    if not is_game_owner(game): abort(403)
+    if not is_game_owner(game):
+        abort(403)
     form = ObjectiveForm()
     objective = Objective(name='', latitude=52.0932, longitude=5.12405)
     if form.validate_on_submit():
@@ -153,8 +159,9 @@ def add_objective(game_name):
 @app.route('/objective/<objective_hash>/delete', methods=['GET'])
 @login_required
 def delete_objective(objective_hash):
-    objective = Objective.query.filter_by(hash = objective_hash).first_or_404()
+    objective = Objective.query.filter_by(hash=objective_hash).first_or_404()
-    if not is_objective_owner(objective): abort(403)
+    if not is_objective_owner(objective):
+        abort(403)
     if is_objective_owner(objective):
         db.session.delete(objective)
         db.session.commit()
@@ -181,15 +188,16 @@ def serve_pil_image(pil_img):
 @app.route('/objective/<objective_hash>/qrcode.png')
 @login_required
 def objective_qrcode(objective_hash):
-    objective = Objective.query.filter_by(hash = objective_hash).first_or_404()
+    objective = Objective.query.filter_by(hash=objective_hash).first_or_404()
-    if not is_objective_owner(objective): abort(403)
+    if not is_objective_owner(objective):
+        abort(403)
     img = generate_qr_code(url_for('objective', objective_hash=objective.hash, _external=True))
     return serve_pil_image(img)
 
 @app.route('/objective/<objective_hash>', methods=['GET', 'POST'])
 @login_required
 def objective(objective_hash):
-    objective = Objective.query.filter_by(hash = objective_hash).first_or_404()
+    objective = Objective.query.filter_by(hash=objective_hash).first_or_404()
     owner = is_objective_owner(objective)
     qrcode = generate_qr_code(objective) if owner else None
     form = ObjectiveForm()