For more techniques, keep an eye on the updates to this post. 1. Operations Is No Longer Guesswork Everything is interconnected, and the internet’s model of the physical world is becoming more and more accurate. Our geographic location, our movement trajectories, and our operations on electronic devices are all being recorded.

1. Introduction Jupyter Notebook (formerly IPython notebook) is an interactive notebook that supports running more than 40 programming languages. Jupyter Notebook is in fact a web application that lets you create and share program documents, with support for live code, mathematical equations, visualizations, and Markdown. Its uses include data cleaning

1. Terminology xpath: There are two approaches, the exact path and the approximate path. Exact path: body>div[0]>div[3]>ul>li[5]>a[0], walking up from the clicked element all the way to the root node and recording every node along the way. Approximate path: body>div.header>div.nav>a[23], which on top of the former omits from the upward path any node that is not on the whitelist.