I recommend skipping both cases of the letter O as well. I'm surprised so many people use it, especially to mean "object". Really, code that uses `my_dict[O]` w

I recommend skipping both cases of the letter O as well. I'm surprised so many people use it, especially to mean "object". Really, code that uses `my_dict[O]` where the object is a hashmap key or `O1 + O2` demonstrating the wonders of operator overloading even show up in textbooks. No scope is small enough to justify O as a variable name.