[python/en] wrappers issue

[annakz1]

I saw 2 issues in the '7. Advanced' section:

1. In the "log_function" wrapper I don't see the '3' printed as explained:
   my_function(1,2) # => "Entering function my_function"
# => "3"
# => "Exiting function my_function"
   For the '3' to be printed I needed to add print(result) inside the log_function- I would suggest adding it.
2. The last line in the article didn't work for me- print(my_function.__code__.co_argcount) # => prints 0 instead of 2 as expected. I see in debugger that co_argcount inside the wrapper function=2, but it prints 0 for print(my_function.__code__.co_argcount).
   Could it be that co_argcount is not supported in the functools @wraps?