Add execution timer function

Automation/src/execution_timer/et.py

@@ -0,0 +1,19 @@
+"""
+Decorator for execution time evaluation
+Usage
+=====
+# @exec_time
+# def function_name():
+"""
+def exec_time(func):
+    """Returns the execution time of a function"""
+    import timeit
+
+    def wrapper(*args, **kwargs):
+        start_time = timeit.default_timer()
+        res = func(*args, **kwargs)
+        elapsed = timeit.default_timer() - start_time
+        print('Elapsed time: %f' % elapsed)
+        return res
+
+    return wrapper