diff --git a/backend/cameras.py b/backend/cameras.py
index 001fe763574175b9b429e3c475371d012175d57b..5cfccad5e996f09be08cc05d34f4774c50e4707e 100644
--- a/backend/cameras.py
+++ b/backend/cameras.py
@@ -3,49 +3,49 @@ restaurants = [
         "restaurant": "local",
         # the linear function estimating the waiting time t based on the number of people n and the number c of open checkouts is:
         # t = a * n / c + b
-        "a_factor": 30, # slope
-        "b_factor": 120, # y-intercept
+        "a_factor": 30,  # slope
+        "b_factor": 120,  # y-intercept
         # list of all the cameras that correspond to a same restaurant
         "cameras":
             [
-                {   
+                {
                     # the RTSP url will be: rtsp://user:password@IP:stream
                     "IP": "",
                     "user": "",
                     "password": "",
                     "stream":  "stream1",
                     # list of the coordinates of the points which constitue the region that should be masked on the picture
-                    "mask_points": 
+                    "mask_points":
+                    [
+                        # polygon which should be part of the mask
                         [
-                            # polygon which should be part of the mask
-                            [
-                                # [x, y] coordinates of each vertex of the polygon (on a 1280*720 picture)
-                                [70, 370],
-                                [420, 720],
-                                [1280, 720],
-                                [1280, 250],
-                                [930, 215],
-                                [450, 550],
-                                [130, 350]
-                            ]
-                        ],
+                            # [x, y] coordinates of each vertex of the polygon (on a 1280*720 picture)
+                            [70, 370],
+                            [420, 720],
+                            [1280, 720],
+                            [1280, 250],
+                            [930, 215],
+                            [450, 550],
+                            [130, 350]
+                        ]
+                    ],
                     # list of the coordinates of each checkout
                     "checkouts":
-                        [
-                            # each checkout corresponds to a rectangle, indicated by two x and two y coordinates
-                            {
-                                "x1": 380,
-                                "x2": 435,
-                                "y1": 740,
-                                "y2": 780
-                            },
-                            {
-                                "x1": 300,
-                                "x2": 350,
-                                "y1": 830,
-                                "y2": 880
-                            }
-                        ]
+                    [
+                        # each checkout corresponds to a rectangle, indicated by two x and two y coordinates
+                        {
+                            "x1": 380,
+                            "x2": 435,
+                            "y1": 740,
+                            "y2": 780
+                        },
+                        {
+                            "x1": 300,
+                            "x2": 350,
+                            "y1": 830,
+                            "y2": 880
+                        }
+                    ]
                 }
             ]
     }