add exception handling to web requests.

This is just making the code more robust to timeouts and connection errors.

light-wave.py

@@ -29,26 +29,56 @@ ax.set_xticklabels(())
 
 # Updates the line chart for factory1
 def animate1(i, ys):
-    f1_request = session.get(
-        "http://ritherdon.abbether.net/api/readings/latest/1", timeout=5)
-    f1_data = f1_request.json()
-    f1_reading = f1_data.get("reading")
-    ys.append(f1_reading)
-    ys = ys1[-x_length:]
-    line1.set_ydata(ys)
-    return line1,
+    try:
+        f1_request = session.get(
+            "http://ritherdon.abbether.net/api/readings/latest/1", timeout=5)
+        f1_data = f1_request.json()
+        f1_reading = f1_data.get("reading")
+        ys.append(f1_reading)
+        ys = ys1[-x_length:]
+        line1.set_ydata(ys)
+    except requests.exceptions.ConnectionError:
+        pause = 60
+        time.sleep(60)
+        print(
+            f"[WARNING] MAX. REQUESTS EXCEEDED: Pausing requests for {pause} seconds...")
+        pass
+    except requests.exceptions.Timeout:
+        t_stamp = datetime.datetime.now()
+        print(f"[WARNING] TIMEOUT EXCEPTION: Request timed-out at {t_stamp}.")
+        time.sleep(60)
+        pass
+    except Exception as e:
+        print(f"[ERROR] GENERAL EXCEPTION: {e}")
+    finally:
+        return line1,
 
 
 # Updates the line chart for factory2
 def animate2(i, ys):
-    f2_request = session.get(
-        "http://ritherdon.abbether.net/api/readings/latest/2", timeout=5)
-    f2_data = f2_request.json()
-    f2_reading = f2_data.get("reading")
-    ys.append(f2_reading)
-    ys = ys2[-x_length:]
-    line2.set_ydata(ys)
-    return line2,
+    try:
+        f2_request = session.get(
+            "http://ritherdon.abbether.net/api/readings/latest/2", timeout=5)
+        f2_data = f2_request.json()
+        f2_reading = f2_data.get("reading")
+        ys.append(f2_reading)
+        ys = ys2[-x_length:]
+        line2.set_ydata(ys)
+    except requests.exceptions.ConnectionError:
+        pause = 60
+        time.sleep(60)
+        print(
+            f"[WARNING] MAX. REQUESTS EXCEEDED: Pausing requests for {pause} seconds...")
+        pass
+    except requests.exceptions.Timeout:
+        t_stamp = datetime.datetime.now()
+        print(f"[WARNING] TIMEOUT EXCEPTION: Request timed-out at {t_stamp}.")
+        time.sleep(60)
+        pass
+    except Exception as e:
+        print(f"[ERROR] GENERAL EXCEPTION: {e}")
+    finally:
+        return line2,
 
 
 # Starts the animations and shows the graph (I.E. 'main')