Confidence intervals are a useful metric for understanding the uncertainty within samples. With Python, this concept can be applied to linear models as well as in the visualization of said models.
Creating a simple grouped matplotlib bar chart is a little complicated but documented, using time series is just as doable but not as well documented.
Any website can be scraped using their public albeit undocumented APIs.
A brief guide on using Realtor's public albeit undocumented API to pull listings data for Real Estate properties.
While sed can ultimately be used to extract text from a string, the process has to be approached as editing the text as opposed to filtering.