IF AND ELSE STATEMENT

If Statements

These statements are a bit like asking a question. You are telling the computer: if something is true, then do this specific block of code. Double equals (==) is asking the computer to compare if these two things are exactly the same.

EXAMPLE :

myName = input("What's your name?: ")

if myName == "David":

What is else?

IF the condition is not met with the if statement, then we want the computer to do the else part instead. Likewise, if the condition is met in the if statement, then the else bit is ignored by the computer. The else statement must be the first thing unindented after the if statement and in line with it

EXAMPLE :

myName = input("What's your name?: ")

if myName == "David":

print("Welcome Dude!")

print("You're just the baldest dude I've ever seen")

else:

print("Who on earth are you?!")

Comments

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...

Client/Server Logins

Client/Server Logins Waaay back when we learned about repl.db, we mentioned the idea of a client/server model for storing data in one place and dishing it out to multiple users. This model is the way we overcome the issue with repl.db of each user getting their own copy of the database. Well, now we can use Flask as a webserver. We can build this client server model to persistently store data in the repl (the server) and have it be accessed by multiple users who access the website via the URL (the clients). Get Started Previously, we have built login systems using Flask & HTML. We're going to start with one of those systems and adapt it to use a dictionary instead. 👉 First, let's remind ourselves of the way the system works. Here's the Flask code. Read the comments for explanations of what it does: from flask import Flask, request, redirect # imports request and redirect as well as flask app = Flask(__name__, static_url_path='/static') # path to the static fil...

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....

PYTHON SYNTAX

Search This Blog