If program crashes, attempt to log exception to stderr and show in me…

…ssage box

launch.py

@@ -1,11 +1,32 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 """This file is used to launch the program."""
-from __future__ import absolute_import
+from __future__ import absolute_import, print_function
 import sys, os
 from core import lnp
 sys.path.insert(0, os.path.dirname(__file__))
-#pylint: disable=redefined-builtin
+#pylint: disable=redefined-builtin, bare-except
 __package__ = ""
 
-lnp.PyLNP()
+try:
+    lnp.PyLNP()
+except:
+    import traceback
+    message = traceback.format_exception(*sys.exc_info())
+    #Log exception to stderr if possible
+    try:
+        print(message, file=sys.stderr)
+    except:
+        pass
+
+    # Also show error in Tkinter message box if possible
+    try:
+        if sys.version_info[0] == 3:  # Alternate import names
+            # pylint:disable=import-error
+            import tkinter.messagebox as messagebox
+        else:
+            # pylint:disable=import-error
+            import tkMessageBox as messagebox
+        messagebox.showerror(message=message)
+    except:
+        pass