Abusing yahi -a log based statistic tool à la awstats- to plot histograms/date series from CSV

Foreword what is yahi? Yahi is a python module that can installed with pip to make a all in one static html page aggregating the data from a web server. Actually, as shown with the parsing of auth.log in the documentation , it is pretty much a versatile log analyser based on regexp enabling various aggregation : by geo_ip, by histograms, chronological series. The demo is here . It pretty much is…