In this video, we're gonna be building a simple chat application using Django. First of all, we don't want all these posts right here, because if a user can read all the posts from the main page, then he doesn't need to click on that post. And then all I'm just gonna do is make migrations and migrate, which is python managed.py. And we also want to print the variable with it. So we're getting all the values from you. So that's basically basic arithmetic operation with Python, we can go further just what we did with strings, we can go further and use the beauty number functions. So as you can see, we already have rest framework added on to this rest framework, dots fourth, talking, so that is different. So I've seen, once it gets to this j, you It should break, then you should stop that loop. And let's say we want we have 1000s of data is this how we are just going to render them each. And then let me show you a quick demo of what we're gonna build. Because we'll define a function, let's say we have a function to say, I and then let it pass a name. So we don't need to add any syntax or anything, we just print 78. So if his post metal damage the user as filled in the details and clicked on submit, and then is waiting to be signed up. And, yeah, so as that is opening them quickly say something. Now, if we sent sending the request is our postman works, it's gonna tell the API for you. And then we also get the type of the list. Now there are other things we can do, as I said, duplicates are not allowed in, in in dictionary. You see it says all services very quickly as that detail. Now once I print, it is not going to print it 43512 is going to print 12345 in ascending order. Now if I run this, you see it gives me New Zealand, if I see minus two minus two is obviously Australia. So now when I send, because it gives me admin to 27 years old. Well, we can also use a nationality and say you just give it a nationality. Django is a framework built upon Python. So you see, we have quick, we have reliable. Codecademy:The Back-End Engineer career path is an intensive, 4-month interactive course designed to take you from zero to modern development professional. Let me use for example, like Instagram has come to explain. So now what you see now we have a list that contains all the data we have. Generally, this is for Python Backend Web Developer with a speciality in Instant Messager using Matrix. So the serializer is a big about the lack of form, like a modal form. So anyway, with the series home, what is being done there, what is going to be rendered. So now as you can see, it requires us to be authenticated to provide some authentication token or something before it can give us access to URLs to our API's. So we can now add else this else means if a vigils correct this, if A is not equals to this, so as an IF is equals to B it should print A equals B else means anything except that, then she just print a not equals b. By the end of this Learning Path, you will have a full understanding of how Django works and how to use it to build web applications from scratch. Now, to be honest, it gets more complex than this layer, I'm going to walk you through every single thing you need to know to get started, and I'm going to simplify every single thing. Here you will explore the most important technologies and concepts you need to know to become a market-ready backend developer. So guys, the first thing we need to do to get started with this project is to obviously install Django. Now, if this is the library or module you want to use, you can just run this command line, and then it's good to go I installed this module or this library on your local computer. Well, in back end developers, so let's enter this same room, or space states for now? We have the for loop where the statement we have the conditional STD FDS member. So first of all, let's do from rest framework. We also do not have links that lead to sites DMCA copyright infringement. Let me explain. Are you sure you want to create this branch? And then this so what this is doing is that once a user it on sent and it has been saved in the database, we want to delete these once we delete that particular line from the input. Now this folder is going to be called templates. Now let me say I am a boy, now is bring to us your sentences, I am a boy. So I'm going to say Select Folder, so it should pop that up. And then we added this URL pattern that I said, the rest framework requires. It can be used for both frontend and backend development. But when we use this delete is just going to delete a way that list is going to delete that value. This means we will learn how to build software that can power multiple frontends, including websites, mobile applications or desktop applications. If nothing happens, download Xcode and try again. But functions is more broad, there are a lot of things we can do with function. So if you know how to do this, then you know how to query it from the database when you just do object dojo, and then get everything you need. So again, I already have the Django rest framework installed, so it should tell me requirement already satisfied. So now when we run this is going to ask us for the first number, let's say 80. Now, this should give us exactly the same answer. So right here, it shouldn't be in this old class. And after this view, taking a request is also going to take that particular variable which has been passed, which is called PJ. Once you print it, you're gonna see right here we have seen printed visuals close this up. So let's also try more things like try accept. And then once we print, we can still go ahead and print. Now you can look through anything, actually, you can look through a dictionary, so they just have a simple dictionary. So it gives me from here all the way to three. So this is how to connect Postgres to your Django project. Python is a full-stack language. Once again, I really hope you guys enjoyed building this with me. Now this command line is going to install Django on our computer, so it's going to install Django on the system, so we can access it from anywhere. So now, we can easily come to a command prompt, and just the Python managers Pew II run server. In this course, we're going to be learning everything you need to know to start your web development journey with Python. And then first, to get it to see requests that get getting worse, I'm going to explain all this. So this form is a post form, as you can see, using the POST method, in Django, anytime we're using the POST method, we always want to make sure to add CSRF token, something like this. And then what you want to do is to just write the ofa. Let me just say, from those D, F serializers. Now this is mostly used, because it weighs in again matters, let's say for when a user wants to sign up to a website, we don't want to pass the user username and password right here in the URL down to make sense, or user wants to pay online with his credit card, we don't want to put the credit card details in his URL. Now it says forbidden CSRF token verification field, request aborted. And theme is the value assigned to this name. It's your first sent those data to a view that we check if this particular room as I said or not. Like everything we've learnt in this tutorial, I can easily code them yeah, like, let me say, print you enjoying this tutorial. can see it right here at seven, we can also add a Boolean, we can say is tall. What is it getting for only this type of error? So what I just did know was, I said it should create a new user with these credentials. Now this stuff is gonna be there is just there. Now to do that, we need to use URL mapping or URL routing. Just go with city, or then city top, you understood what we did, right? And if a is also equals to B, it resists a true because A is equals to B. It's just the basic, the basic fixture in our blog is the crud functionality, which is create, read, update, and delete. I want to first make sure that I have Django installed. So I'm just going to import this template into my projects. So most of the times we are working in Python, you're gonna get a lot of errors, you might do some things on the program is going to draw an arrow or an exception. So the key might be something like, name, and then I'm gonna use this column. So if the length of the sentence is less than 10, they will say value is less than 10. So first we'll add the double quotes we can just easily add the bus slash then the quotes now once you have a blog slash, and that's good, this court is going to print it as I run it, you see now we have I with this good hour you so if you want to create special characters, we use the backslash, or you can just bring the backslash alone is gonna work. Most of the times when you're working with Python, you might want to use Postgres, you may want to switch was also very easy. So I'm going to ask the user for three inputs, the first input will be the sentence, the second input is going to be what do you want to change, and then the total input is what do you want to replace it with. But if the value is value, it should break. Now there are also a lot of other things we can do with list, like we can get the length of this list, let's say want to get how many values we have in this list, because most of the times you have large amount of data can start counting them one by one like these. 1 from django.urls import path 2 from .views import home 3 urlpatterns = [ 4 path('', home,name='home'), 5] python. So we can convert this string into an integer. And then we can also get the absolute value of a number. Hey, guys, welcome to the second part of this Django tutorial. This cherry, we want it to be right here, something like this. That means if all the values value in blue are correct, just like we want to collect an integer field, of course, we want to have an integer field, if we're supposed to call it an integer field, we have all character food or Tex food, then that serializer is not valid. So but for now, when it's empty, it means the comeback, just the main sites, a main project, where we say slash download is miss our site slash download. Now you can see everything is working perfectly. Then if we have these they should be out the country code should be we have these initial these else, which is our else statement alleges entity if we don't need else. So we're just going to save and then if I come here So it says local variable city referred before assignment. Now the reason why it says 23 is because he still sees this as a string. Now, if we want to get this as let's say an integer, we have to type int, we have to convert it to integer. So if you want to get it, as I said in the intro, I'm going to have a link to the source code of this project in the description below. And then if you click on like this team, you should go to slash Brewster's team. And the reason why it won't run is because one of these is not correct. This is what is used in most sites, like when you have a profile page, which is like john, and then you see the name of the pressing john, then like, says, we have the username adipiscing, became the username to the top into the database, I get the profile picture, get the age, get all the posts, get everything we need about a specific user. So and that is this block of code right here. So now, we can just say want to get only the first letter. Now let's click on this, you see this installation of Python, the date it was created with with the old posts, and let me go back again, or click on another one, you see this mentioned that particular post. We're gonna use it to like this installed apps, we're going to do some things in this, we scroll down to see where we have templates. This is too detailed, we're gonna use both in this HRF. So right now, I'm just gonna come into weather. The book starts with Exercise 0 which is about getting Python set up on your computer. model, the Django model right here installed. So whether there is an error or not, this is going to print f seven, there is no arrow, it's print seven and says try is finished. We're going to take in four parameters. So now we have this database, which is very good. With refresh, we should see welcome admin. Not w means want to write on this file, we want to edit this file. So I put the list, but the name of this is lists. So let's just come on to the top here and print something like that. So we know that the index number of this is one of zero, which is the first one, then we also want to get the face value, which would be zero. But you can see that those two are shown. So now that this view as all this data, which to us are kind of inputted, or we just want to do is to store that data in this message database, we'll let that quickly load. So the key, the default key for Django shouldn't be authorization, authorization, and the value you're going to write is going to be talking and then followed by that particular token, which was created for the user just talking, which is tempting as the stalking. So let's also see another one like, is authenticated. Now we come here to refresh, boom, you can see now that we have this HTML page, we have a written set of whoever the front end set up. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. So when we opt out of that Django away, we close the server and we started it again, it reloaded, so sometimes you might need to do that. And then we'll say the name of the virtual environment in Mr. But now what we want to do is I want to show all those messages, if there is any error, see these messages, we need to show it right here if any error occurs. But now when we are using this list constructor, is called the list constructor, it is used to construct a list, where I'm going to use square brackets again, we're gonna use normal round brackets like this. But we can basically do all these writing in our Python ideally is what I want to show you. So we can use this to assess the messages for each room later. Now that we have these everything imported, we can now create a class to inherit from this API view, so that we can get a lot of methods that we can work with. And then I can also get the type just to make sure this is a top like a gundu type to know if this is a top or not. So now, we have talked about doing everything in the command line interface, creating the project. So now we have this year, where we can just you know is to pass this into the index of HTML. So what this is doing is that, let's say we have a sentence named I am a boy, then this word one is the boy wants to change, and then we're two it was one to replace it with. Let's say ah, let's say we want a module like, let's just go to the home page. So does exactly the same thing we're going to be doing right here in our project is already our word to use our routes stored in this variable, by just going to add a new variable, I will say amount of words, we can name it like. So as you can see, we have the value of the message a developers, we have the date and the time, we have the user which submitted our message, and we have the room. So what happened was that is loops through this block of code. There was say there now we cannot say value. But now if we use like if we create a new one now it should show right here. Now, if you want to create a new database, just right click on this database and eat, create, and then click on database. This book is divided into fourteen chapters and includes the following topics: Chapter 4 covers HTTP Servers and Clients, Chapter 5 talks about your first Express Application, Chapter 6 talks about implementing the Mobile-First Paradigm, Chapter 7 covers Data Storage and Retrieval, Chapter 8 talks about authenticating users with a Microservice, Chapter 9 covers Dynamic Client/Server Interaction with Socket.IO, Chapter 10 talks about deploying Node.js Applications to Linux Servers, Chapter 11 talks about deploying Node.js microservices with Docker, Chapter 12 covers deploying a Docker Swarm to AWS EC2 with Terraform, Chapter 13 covers Unit Testing and Functional Testing, Chapter 14 talks about Security in Node.js Applications. Like do we have an external CSS file that is linking to this HTML file, that is a static file, if we have an image, we have an external video, all those are static files. So we have to say, from views from this import views. So first of all, we need to let me remove this, we don't need this again. Now once I run it, you see gives me five, which is because I have five values in here. So that is how to pass in parameters or arguments. As you can see, it says requirement already satisfied. So he says Your name is john, and you are 105 years old. So we're gonna make this dynamic or dispose dynamic recognizes static posts there is there which is just this, we're gonna get all these from our database soon we're writing these. So let's go ahead and fix that we're going to create a new URL for the login, our gonna allow a user to log into the site, then when a user logs into the sites, instead of just showing all these dummy or starting data. To read just go back and add something to remove these and now we should have 12344 with submit it says the amount of words is four. So for you to know, if you've actually if you are in a virtual environment, or if the environment is activated, you are going to see these brackets and then the name of the environment in it before the directory. Now, when we say something went wrong, after this, we can say else. They act as a bridge between the back end and the databases and allows the developers to fetch the user data. lets you just take your request for no less return render request, register dot html. And then this HTTP response isn't gonna be can be like an just an HTML tag, like an h1. And then want to say from Django dot country, the report dot models import user on both. But if we want to, like change it or save and say integer. So does the basic concept of an if statement. So after that, we can just say, after everything is also loaded these so if it's not a request, the method is not post and you just get, it can just do these. So yeah, it says type error top object does not support item assignment. So we fill this in an installment now, nothing is gonna happen. So once a user clicks on these, they're gonna take the user to read the whole post. And then we're going to tell the user what input. So for row in lists, must make sure that everything is intact. So except it gives us an error because of the interpretation. Now have you noticed that let's dive straight into this video. So classes is just like a feature in Python, say something like a function. So right here, a module created a new model name message. So like this, on the winner, eat refresh. So first of all, you need to come to your site, which is open weather maps.org. So we have to say, ain't no ain't gonna pay stub bugs are gonna do the same thing for the second one in a beast. As you can see, we have this installed already. Now when I run these, you see it says class is a string. So right here, I have it downloaded already, we just click on Enter does to run it. And that will because we forgot to add a comma right here. So now anything we input is automatically seen as an integer. It should render that index dot HTML folder, which is right here. So that is how to use return statements in a Python function. 1. So from Django shortcuts is the command line. So first of all, since we have this query set, which is all the objects, we know that, oh, God has more than one. In the next part, I'm going to show you how to implement peep and then install all those kind of modules on your computer. So I also change is only like 10, you're gonna give me from zero to nine. Normally we do have these are this is very good. And then let's refresh and see what we're gonna get. Okay, now, the reason why we're getting this is because right here, there is no equals to. And then this should be repeated password. Selecting a backend# There are three ways to configure your . So you can see right, yes, this class is dict, which means that these is a dictionary. So obviously a is the same thing as team. Now, I don't think we should even say contains I think we're supposed to say with a room that equals to room details or ID. And I also do some things like I can get the length of a toggle, I can just say print le n and then it's just going to give me the amount of values we have in this top. We will not only learn the Python needed to build backend software, but we . And then we can say, and word to replace. Now, they actually have their documentation where you can get out to use all these, but I already know how to use it. And each of these stands as blog posts from your database right here. So this index of HTML is a template file. So we know we send in a message with entering and doing stuff like that. There's an h3 saying the message under less than the full loop. To now guys a service is reliable, is easy to use, and our services vary. When I run it, you see nothing happens, we're right here, new file is created. It will walk you through Python programming techniques and guide you in implementing them when creating 4 professional Django projects, teaching you how to solve common problems and develop RESTful web services with Django and Python. Chapter 1: Intro to Design Patterns Covers the use and benefits of design patterns as well as some object-oriented design principles. So now we have to use a button, we can say view dot index, and then we just give it a name of index. A comprehensive guide to Python programming for web development using the most popular Python web framework - Django Key Features Learn the fundamentals of programming with Python and building web apps Build web applications from scratch with Django Create real-world RESTful web services with the latest Django framework Book Description And then anything we do to the same path is what should be done. So for this project, we are not going to create a Django app, at least for now. They want to say, city shouldn't be equals to request dot posts. So whatever we do in this function is one is going to be assigned to this particular URL. Let's remove all of these, which we passed. So that's basically what while loop is about, it's very important in Python, there are a lot of Python programs, you want to build that we needed to use a while loop to loop through different things with a condition. This Learning Path includes content from the following Packt products: We got some British, and then we can just continue like that is basically a dictionary. For now, what I can just do is to print x. And I'm gonna use normal brackets parenthesis, and it has to be double. So let's copy these and this should be your login. Now let me print it, you see says class lists.

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