Define KeyboardInterrupt Exception Handler in wmlxgettext

Note: The signal class object was used to avoid wrapping the entire main routine in a try...except clause.

data/tools/wmlxgettext

@@ -34,6 +34,7 @@
 import os
 import re
 import sys
+import signal
 import warnings
 import argparse
 from datetime import datetime
@@ -162,6 +163,7 @@ def commandline(args):
 
 
 def main():
+    signal.signal(signal.SIGINT, sigint_handler)
     args = commandline(sys.argv[1:])
     pywmlx.ansi_setEnabled(args.text_col)
     pywmlx.wincol_setEnabled(args.text_col)
@@ -264,5 +266,15 @@ def main():
 
 
 
+def sigint_handler(signal, frame):
+    """This function defines what happens when the SIGINT signal is encountered by pressing ctrl-c during runtime. 
+    When ctrl-c is pressed, a one-line message is displayed and Python exits with Status 0, which refers to successful termination.
+    This overrides Python's default behavior of displaying a traceback when ctrl-c is pressed.
+    """
+    print ('Aborted by pressing ctrl-c')
+    sys.exit(0)
+
+
+
 if __name__ == "__main__":
     main()