refactoring

src/SevereColumnAdder.py

@@ -0,0 +1,7 @@
+class SevereColumnAdder:
+    
+    @staticmethod
+    def addSevereColumn(dataFrame):
+        dataFrame['SEVERE'] = (dataFrame['DIED'] + dataFrame['L_THREAT'] + dataFrame['DISABLE']) > 0
+        dataFrame['SEVERE'].replace({True: 1, False: 0}, inplace = True)
+        return dataFrame