title: How to retrieve data from HTML canvas using python?
body: <p>I am new of web scraping and for one of the project I am working on, I need to retrieve data of bitcoin transactions over time from an interactive chart (<a href="https://bitinfocharts.com/comparison/bitcoin-transactions.html" rel="nofollow noreferrer">https://bitinfocharts.com/comparison/bitcoin-transactions.html</a>) using Python 2.7. I found that all the data I want is hidden in the 855x455 canvas instead of directly in the html file. However, I could find those data in Page source in the form of [new Date("2018/02/18"),159333]]. Why is that? And how can I scrape those data? Appreciate for the help!</p>