|Code Listing by Anler Hernandez Peral|
The Singleton design pattern (DP) has a catchy name, but the wrong focus -- on identity rather than on state. The Borg design pattern has all instances share state instead, and Python makes it, literally, a snap.
A progressbar utility for command line programs, very easy to use.
The original code is hosted in github: https://github.com/ikame/progressbar
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