Depends how often it's used. If you're just calling it once I wouldn't bother, but I was going off of makecheck's comment of, "if I had to write tons of those in code." I misread the style guide linked, I do find decimal.Decimal("12.34567") inconveniently long--but I generally don't mind inconveniently long names for increased intelligibility and the IDE does most of the heavy lifting. I don't often use "as" it's usually to increase the readability.

Similarly, I often see "from pprint import pprint as pp"