| Examples of classes that implement special operators (see reference manual): | 
 |  | 
 | Complex.py	Complex numbers | 
 | Dates.py	Date manipulation package by Tim Peters | 
 | Dbm.py		Wrapper around built-in dbm, supporting	arbitrary values | 
 | Range.py	Example of a generator: re-implement built-in range() | 
 | Rat.py		Rational numbers | 
 | Rev.py		Yield the reverse of a sequence | 
 | Vec.py		A simple vector class | 
 | bitvec.py	A bit-vector class by Jan-Hein B\"uhrman | 
 |  | 
 | (For straightforward examples of basic class features, such as use of | 
 | methods and inheritance, see the library code -- especially the window | 
 | modules are full of them.) |