linhanGE
linhanGE
/ pcniter.py
Created
July 13, 2017 23:14
— forked from mortenpi/pcniter.py
Previous / current / next iterator in Python
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| def previous_current_next(iterable): | |
| """Make an iterator that yields an (previous, current, next) tuple per element. | |
| Returns None if the value does not make sense (i.e. previous before | |
| first and next after last). | |
| """ | |
| iterable=iter(iterable) | |
| prv = None | |
| cur = iterable.next() | |
| try: |