add exception handling to web requests.

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

light-wave.py

@@ -29,6 +29,7 @@ ax.set_xticklabels(())
 
 # Updates the line chart for factory1
 def animate1(i, ys):
+    try:
         f1_request = session.get(
             "http://ritherdon.abbether.net/api/readings/latest/1", timeout=5)
         f1_data = f1_request.json()
@@ -36,11 +37,26 @@ def animate1(i, ys):
         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):
+    try:
         f2_request = session.get(
             "http://ritherdon.abbether.net/api/readings/latest/2", timeout=5)
         f2_data = f2_request.json()
@@ -48,6 +64,20 @@ def animate2(i, ys):
         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,