A classic problem in multi-threading programming

• run_with_lock.py: using lock technique, get will fail when queue is empty.
• run_with_condition.py: using condition technique, put will fail when queue is full.
• run_with_condition_extended.py: using condition technique.
• run_with_queue: using python queue library.

https://www.agiliq.com/blog/2013/10/producer-consumer-problem-in-python/