migrate snippets from gitlab

tk_task_wrapper.py

@@ -0,0 +1,24 @@
+def long_running_task(status):
+    " status decorator "
+
+    def lrt_decorator(func):
+
+        def lrt_wrapper(*args, **kwargs):
+            self = args[0]
+            self.lb12["text"] = status
+            self.bu10.state(['disabled'])
+            self.bu11.state(['disabled']) 
+            self.update_idletasks()
+            try:
+                rc = func(*args, **kwargs)
+            finally:
+                # make sure GUI unlocks even after exception
+                self.lb12["text"] = "Ready."
+                self.bu10.state(['!disabled'])
+                self.bu11.state(['!disabled']) 
+                self.update_idletasks()
+            return rc
+
+        return lrt_wrapper
+
+    return lrt_decorator