https://sourceforge.net/tracker/?func=detail&aid=2933210&group_id=237831&atid=1104178

git-svn-id: https://pycam.svn.sourceforge.net/svnroot/pycam/trunk@63 bbaffbd6-741e-11dd-a85d-61de82d9cad9

pycam.py

 #!/usr/bin/python
-import sys
-import os
+
+from optparse import OptionParser
 
 from pycam.Gui.SimpleGui import SimpleGui
 from pycam.Importers.TestModel import TestModel
 
-gui = SimpleGui()
-
-inputfile = None
-outputfile = None
-display = False
-
-for arg in sys.argv[1:]:
-    if arg == "-gui":
-        display = True
-    elif arg[0] != '-':
-        if not inputfile:
-            inputfile = arg
-        elif not outputfile:
-            outputfile = arg
-
-if not inputfile:
-    gui.model = TestModel()
-    gui.mainloop()
-else:
-    gui.open(inputfile)
-    if display:
+# check if we were started as a separate program
+if __name__ == "__main__":
+    inputfile = None
+    outputfile = None
+
+    parser = OptionParser(usage="usage: %prog [--gui] [inputfile [outputfile]]")
+    parser.add_option("", "--gui", dest="display",
+            action="store_true", default=False,
+            help="ignore 'outputfile' and show the GUI window")
+    (options, args) = parser.parse_args()
+
+    if len(args) > 0:
+        inputfile = args[0]
+    if len(args) > 1:
+        outputfile = args[1]
+    if len(args) > 2:
+        parser.error("too many arguments given (%d instead of %d)" % (len(args), 2))
+
+    gui = SimpleGui()
+
+    if not inputfile:
+        gui.model = TestModel()
         gui.mainloop()
     else:
-        gui.generateToolpath()
-        if outputfile:
-            gui.save(outputfile)
+        gui.open(inputfile)
+        if options.display:
+            gui.mainloop()
+        else:
+            gui.generateToolpath()
+            if outputfile:
+                gui.save(outputfile)