25Jan 2018 by Andrew Treadway
Coding with the Yahoo_fin Package

Coding with the Yahoo_fin Package

Python, Web Scraping
Background on yahoo_fin The yahoo_fin package contains functions to scrape stock-related data from Yahoo Finance and NASDAQ. You can view the official documentation by clicking this link, but the below post will provide a few more in-depth examples. Also, please check out my yahoo_fin playlist on YouTube. The first video is below, which covers installation and getting historical / real-time stock prices. The functions in yahoo_fin are divided into two modules, stock_info and options. This post will focus on introducing stock_info. For more on using the options module, check out this post. Let's get started by importing the stock_info module from yahoo_fin. [code lang="python"] import yahoo_fin.stock_info as si [/code] Downloading price data One of the core functions available is called get_data, which retrieves historical price data for an individual stock.…
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14Jan 2018 by Andrew Treadway
Timing Python Processes

Timing Python Processes

Python
Timing Python processes is made possible with several different packages. One of the most common ways is using the standard library package, time, which we'll demonstrate with an example. However, another package that is very useful for timing a process -- and particularly telling you how far along a process has come -- is tqdm. As we'll show a little further down the post, tqdm will actually print out a progress bar as a process is running. Basic timing example Suppose we want to scrape the HTML from some collection of links. In this case, we're going to get a collection of URLs from Bloomberg's homepage. To do this, we'll use BeautifulSoup to get a list of full-path URLs. From the code below, this gives us a list of around…
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