This is for "The Data Scientist’s Toolbox"
Ypobolh 2
ypobolh 100
Revert "ypobolh 100"

This reverts commit 25f92449a6fc3692f88b066815c1d1751ca55e9f.
Revert "Revert "ypobolh 100""

This reverts commit 0e97229376eabc950f121e63b6594ed6649aaab0.
Revert "ypobolh 100"

This reverts commit 25f92449a6fc3692f88b066815c1d1751ca55e9f.