1Examples of classes that implement special operators (see reference manual): 2 3Complex.py Complex numbers 4Dates.py Date manipulation package by Tim Peters 5Dbm.py Wrapper around built-in dbm, supporting arbitrary values 6Range.py Example of a generator: re-implement built-in range() 7Rev.py Yield the reverse of a sequence 8Vec.py A simple vector class 9bitvec.py A bit-vector class by Jan-Hein B\"uhrman 10 11(For straightforward examples of basic class features, such as use of 12methods and inheritance, see the library code.) 13