Examples cleaned up

- unused imports removed
- removed unused code

are no ready for benchmarking

benchmarks/run_all_examples.py

@@ -9,7 +9,7 @@ from importlib_resources import path
 from benchmarks.benchmark_utils import swap_attr
 
 print("run_all_examples.py")
-
+error_log_examples = {}
 for entry in [entry for entry in importlib_resources.contents('examples') if
               not pkg_resources.resource_isdir('examples', entry)
               and entry.endswith(".py")
@@ -17,6 +17,7 @@ for entry in [entry for entry in importlib_resources.contents('examples') if
               and 'demo.py' not in entry
               and 'DELETE' not in entry
               ]:
+
     with path('examples', entry) as file_in:
         print("")
         print("")
@@ -25,6 +26,7 @@ for entry in [entry for entry in importlib_resources.contents('examples') if
         print("*****************************************************************")
         print("Running {}".format(entry))
         print("*****************************************************************")
+
         with swap_attr(sys, "stdin", StringIO("q")):
             try:
                 runpy.run_path(file_in, run_name="__main__", init_globals={
@@ -32,5 +34,17 @@ for entry in [entry for entry in importlib_resources.contents('examples') if
                 })
             except Exception as e:
                 print(e)
+                error_log_examples.update({file_in: e})
             print("runpy done.")
         print("Done with {}".format(entry))
+
+if len(error_log_examples.keys()) > 0:
+    print("*****************************************************************")
+    print("Error log:")
+    print("*****************************************************************")
+    print(error_log_examples)
+    print("*****************************************************************")
+else:
+    print("*****************************************************************")
+    print("All examples executed - no error.")
+    print("*****************************************************************")