Skip to main content

LIST IN 2D

 LIST IN 2D 

Tables are two-dimensional data structures where we can store data both vertically and horizontally. 


Eg:

my2DList = [ ["Johnny", 21, "Mac"],
             ["Sian", 19, "PC"],
             ["Gethin", 17, "PC"] ]


print(my2DList[2][2])

 

Editing a 2D List 


We can edit values in a 2D list in the same way as variables and 1D lists. You just need to change the value to the new row and column index numbers

Eg: 

my2DList = [ ["Johnny", 21, "Mac"],
             ["Sian", 19, "PC"],
             ["Gethin", 17, "PC"] ]
my2DList[1][2] = "Linux"

print(my2DList[1])






Comments

Popular posts from this blog

HTTP & Sessions

 HTTP & Sessions One of the main protocols (rules that govern how computers communicate) on the web is called HTTP. HTTP is what is known as a stateless protocol. This means that it doesn't 'remember' things. It's a bit like having a conversation with a goldfish. You can ask a question and get a reply, but when you ask a follow up question, the original has already been forgotten, as has who you are and what you were talking about. So if HTTP is stateless, how come my news site remembers to give me the weather for my home town, my preferred South American river based online store tells me when it's time to order more multivitamins, and I'm justifiably proud of my #100days success streak? The answer is......... Sessions Sessions are a way of storing files on your computer that allows a website to keep a record of previous 'conversations' and 'questions' you've asked. By using sessions, we can store this info about the user to access later....

Web Scraping

 Web Scraping Some websites don't have lovely APIs for us to interface with. If we want data from these pages, we have to use a tecnique called scraping. This means downloading the whole webpage and poking at it until we can find the information we want. You're going to use scraping to get the top ten restaurants near you. Get started 👉 Go to a website like Yelp and search for the top 10 reastaurants in your location. Copy the URL.   url = "https://www.yelp.co.uk/search?find_desc=Restaurants&find_loc=San+Francisco%2C+CA%2C+United+States"   Import libraries 👉 Import your libraries. Beautiful soup is a specialist library for extracting the contents of HTML and helping us parse them. Run the Repl once your imports are sorted because we want the Beautiful Soup library to be installed (it'll run quicker this way). import requests from bs4 import BeautifulSoup url = "https://www.yelp.co.uk/search?find_desc=Restaurants&find_loc=San+Francisco%2C+CA%2C+Unite...

HTML , Tags , Body , Headings , Paragraphs , Images , Bullets , Linky ,

 Hyper Text Markup Language Over the next couple of days, we'll be taking a crash course in HTML (Hyper Text Markup Language). HTML is a markdown language. This means that it is used to tell webpages how to render on screen (basically how to look). It is made up of a series of instructions in <tags> that surround text/image filenames, etc. and influence how they are displayed on screen.    Tags Now let's start creating a webpage and learning about the tags. 👉 Step 1 is to tell the file that this is an HTML page. These are the first and last tags on your page. Notice that the last tag has a forward slash before the command. This means close or end this tag. With a few exceptions, tags come in pairs - an opening tag (no /) and a closing tag (with a /).  <html>    </html>  Head The <head> tags contain a lot of invisible information about the page that you won't see on screen. Stuff like: How to display your webpage on different de...