haady.blogg.se - Python download youtube video

The module used in Python for regular expressions is called re. In this case the sequence of characters is: /watch?v= To find occurrences that include the 11-characters identifier we can use regular expressions.Ī regular expression (also known as regex) is a sequence of characters that defines a search pattern. How do we do that? Finding a Pattern in HTML Using Regular Expressions So, to get the URL of each video in the Youtube search results page I have to find occurrences similar to the one we have seen above. ULihXz-MHH8 is a unique identifier for this specific video, the Youtube identifier for videos is made of 11 characters. If I click on any Youtube video I get redirected to a URL in the following format: Why are we looking at this part of the HTML? In the third line of the HTML above you can see: href="/watch?v=ULihXz-MHH8" Sylvia Schwartz: Mozart - Duet Papageno & Papagena from 'Die Zauberflöte' (with Thomas Quasthoff) I’m showing you the part of the HTML we will focus on to identity the URL of a video from the search results page:

Here is a fragment of the HTML of the page printed by our program… For this reason you also need to remember to decode the bytes object from the read() method to string using the decode() method. The urlopen function returns a bytes object because there is no way for urlopen to know the encoding of the stream it receives from the HTTP server.

Use the urlopen function of the urllib.request module to get the HTML of the Youtube search page.įor HTTP and HTTPS URLs, the urlopen function returns a object whose body can be read using the read() method.

Python programs can access the code in another module using the import statement, so let’s: I will use urllib.request to get the HTML for the search results page on Youtube and print its HTML. The one we are interested in is urllib.request that can be used to open and read URLs. The main package used in Python to work with URLs is urllib and it includes several modules.

Let’s start creating a simple Python program that does this specific search and returns the HTML from Youtube.

So, the only part of the URL that changes is the search term. If I search for “Mozart” directly in Youtube I get redirected to the following URL: First of all, in order to be able to search for videos using a program we need to understand the URL structure used by Youtube when we search for a video.