Update pwrball.py - handle excpetion when avoid.cvs file does not exist.

pwrball.py

@@ -35,6 +35,8 @@ def main():
     logging.basicConfig(level=logging.INFO, format = "[%(levelname)s] (%(threadName)-10s) %(message)s",)
 
     avoid = []
+
+    try:
         with open("avoid.csv", "r") as f:
           reader = csv.reader(f)
           for row in reader:
@@ -42,6 +44,8 @@ def main():
             for num in row:
               introw.append(int(num))
             avoid.append(introw)
+    except FileNotFoundError:
+        pass
 
     for item in avoid:
       logging.debug("before: %s", item)