allow standalone call of circleKill.py

Signed-off-by: Julien Veyssier <eneiluj@posteo.net>

modules/circleKill.py

+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
+import sys
 try:
     import dbf
     DBF=True
@@ -95,4 +97,12 @@ def solveCircles(hruList):
             else:
                 # Continue searching in the flow cascade
                 statusMap[targetHru.id] = 2
-                targetHru = hruMap[targetHru.toHruId]
\ No newline at end of file
+                targetHru = hruMap[targetHru.toHruId]
+
+if __name__ == '__main__':
+    if len(sys.argv) > 2:
+        inPath = sys.argv[1]
+        outPath = sys.argv[2]
+        circleKill(inPath, outPath)
+    else:
+        sys.exit('Please provide two arguments: INPUT_PATH OUTPUT_PATH_PREFIX')
\ No newline at end of file