Test your IQ with this challenging brain teaser! Spot the odd number hidden in the '101' sequence series within 11 seconds. Only those with 140+ IQ can succeed!

A PriorityQueue is a list that always keeps its items sorted based on some rule, like smallest to largest. So, when you take an item out, you always get the one with the highest (or lowest) priority.

Materials and IPython notebooks for "Python for Data Analysis, 3rd Edition" by Wes McKinney, published by O'Reilly Media. Book content including updates and errata fixes can be found for free on my ...