Try Python without dots!

[Larz60+]

Let me remark that if you write a file without dots, you can use adddot.py to rewrite the file with the dots automatically, so you can safely program this way.

If you never used it in the first place, you would never have to worry about this.

I think cwsize = len(car wheel size) looks awful.
Whereas cwsize = len(car.wheel.size) immediately indicates that size is an element of wheel which is an element of car,
so car.wheel.size should be able to be used without further processing.

Again this is just me, and my habits go back to when I started coding 54 years ago.