This tutorial will teach you how to build a Flask app that combined with JSON and the Google Charts API. No Javascript required, you build your dashboard in pure Python. Assigned as Python Developer to the Textura project. The next step to building a simple Flask app is creating a homepage and dashboard page. Enter Flask, the micro web framework written in Python by Armin Ronacher. Dive deep into what Flask has to offer and then you will create multiple Python apps from scratch on your own. Flask + Plotly Dashboard Last week I had 3 days to come up with a visualization dashboard. py back up and change the top of the file to include the following imports. Because Flask is a great Framework, a develope has total freendom when builds a new app. For the web developer that wants to monitor the performance for their web-services, a solution is presented. Use the credentials u:admin, p:admin to log in. [Hindi] Edit, Delete and File Upload - Web Development Using Flask and Python #15; 16. If your application falls within that scope, then Dash is almost certainly your best bet out. In this part of the tutorial, you will learn to return HTML pages through your Python script using the flask render_template method. TurboGears, web2py (see above) also use CherryPy. I also have flask App that will extract data from database and push last value to the dashboard. I develop innovative solutions and automate workflows to make life easier for you. CI/CD Pipelines for Python (Flask) — Docker Project to Kubernetes Second verse, same as the first: making containerization and deployment faster with Docker and Kubernetes. Run a simple Python script that will collect system information from a Raspberry Pi and send it to a cloud platform dashboard. In this post I am showing sample code that uses D3. I found Nick's course and decided to give it a try and I honestly think it's giving me a different perspective on Flask and that I need to improve my Flask and Python skills. The easiest way is probably to use the RQ dashboard, a separately distributed tool, which is a lightweight webbased monitor frontend for RQ, which looks like this:. We’ll use this to convert blog post titles into URLs that look nice. com courses again, please join LinkedIn Learning. Then use the virtual environment's Python to install Flask. Maybe not to you as a data analyst/scientist, you may feel …. pip install Flask To test the installation, open a python console and type: $ python $ >>> from flask import Flask $ >>> If your terminal is getting full of errors, Flask is ready to inject steroids into our application. Flask + Plotly Dashboard Last week I had 3 days to come up with a visualization dashboard. My end product is generally a static image in a presentation or report, but I also do a lot of data exploration and tool development (where I use PyQt and PyQtGraph). Keywords: Python, Django, Flask, PostgreSQL, MongoDB, RabbitMQ, Kafka, Redis, REST, Kubernetes Currently working for KPN, a dutch Telecom provider. Building a business dashboard can be a complex and lengthy process. Flask is a really cool Python framework for building web applications. Go to localhost:5000 and you should see a screen like this (I have it zoomed in to make it easier to read): Step 8 - Install Database and API Libraries (Note the change in the name for Flask-SQLAlchemy) pipenv install Flask-SQLAlchemy pipenv install flask-marshmallow. This project is a flask blueprint that allows you to create sleek dashboards without writing any front end (or backend) code. Flask is a micro web framework written in python to achieve this type of framework you can proceed with the the help of this code and can achiveve just need to follow the exact steps in videos. Controlling Your System Using Alexa (Tutorial) I will be using Python/Flask for this purpose. You can also save this page to your account. They built the right AI tools and developed. Greatly simplified and reduced work done by employees by designing and implementing a replacement for bloated Excel customer data sheets with an E-commerce back-end on Google Cloud Platform (Google Apps Engine, PostgreSQL, Python, Flask). This project is a flask blueprint that allows you to create sleek dashboards without writing any front end (or backend) code. Flask (source code) is a Python web framework built with a small core and modularity in mind. One of its major selling points is how simple it is to get started on building apps with it. You get a URL for your. This is enabled through Flask, PyReact, and Pandas. The first example illustrates utilizing a simple Flask application that originates the data to be displayed by Chart. The next step to building a simple Flask app is creating a homepage and dashboard page. signed-out home, register, about, etc. Since RS256 uses a private/public keypair, it. App Structure. mkvirtualenv. I researched in as many different ways as I could flask/flash problems. This page provides an overview of installing the Flask Monitoring Dashboard. Any ideas on what might be going wrong? Note, it does report exceptions properly when run from the command line/debug mode – so it seems like it might have something to do with gunicorn. This is the dashboard for Python Flask. We will also need Flask-RESTful, an extension for Flask which enables rapid development of REST API with minimal setup. My backend choice was flask (we are inseparable) however I had to choose the easiest plotting package. js or ruby) is on my shit list. The world of Python web frameworks is full of choices. Initialize Authentication for Your Flask + Python App with Okta. 7, virtualenv, and pip. py # Just to clean up after the work, deactivate. One of the main problems I have with a lot of visualization and dashboarding platforms is their difficulty in meshing scripting, SQL and visuals into a single layer. The -g flag is used to override that behavior to install bower globally since you will probably use bower for a number of projects. Generating the Bar Chart. Creating a Web App From Scratch Using Python Flask and MySQL: Part 8 In the previous part of this series, we implemented image upload functionality for the users while adding a wish. Material Dashboard, crafted by Creative-Tim - coded as open-source in Flask Microframework. Flask is a pretty robust framework for building web portals in python. 1 Introduction to Flask. Start small, and then you can quickly add any upgrades you need — email, databases, forms, etc. One of the main problems I have with a lot of visualization and dashboarding platforms is their difficulty in meshing scripting, SQL and visuals into a single layer. Shows how to scrape all the blog articles in one category. You'll learn to use and combine over ten AWS services to create a pet adoption website with mythical creatures. Dash is amazing but very specific. Python Flask dashboard for Airtable Gallery sample database One Page Flask. I started out with a bit of Python using the Think Python book, did the Real Python course for Flask and Miguel Grinberg's Flask Web Development tutorial. Flask (for newcomers). It offers freedom for you, the designer, to implement your project in a way that suits your particular application. In this video we will setup the dashboard and pull the articles from MySQL. Talks about web scraping basics. Now that we have an admin user, we need to add a view for an admin dashboard. The homepage is what will be shown to the user when they visit the / URL, and the dashboard page (/dashboard) will be shown to the user once they’ve logged into their account. Throughout this article, I won’t explain any of the HTML and CSS snippets and will be focusing mainly on Bokeh and Flask. How the Flask application connects to the Redis message broker. We'll be doing all of our development here. mkvirtualenv. venv $ source. My end product is generally a static image in a presentation or report, but I also do a lot of data exploration and tool development (where I use PyQt and PyQtGraph). The Python Flask app with have a new URL route. venv $ source. In this tutorial, we will build a simple Flask CRUD application, and add realtime functionality to it using the superpowers Pusher grants us. Full Stack Developer focused in Python, Flask and JavaScript. Flask is a micro web framework written in python to achieve this type of framework you can proceed with the the help of this code and can achiveve just need to follow the exact steps in videos. Capture telemetrics data and create Web dashboards Rasperry-Pi with MQTT, Flask, SQLite, Python ESP8266 with MicroPython, wiring For the makers, developers (IT), and electronic discovery. Creating a Web App From Scratch Using Python Flask and MySQL: Part 8 In the previous part of this series, we implemented image upload functionality for the users while adding a wish. Flask provides a handy command, flask shell, that allows us to use an interactive Python shell for use with Flask apps. If you already have a Flask app running locally by just running it in IDLE, or at the command line (e. Free Returns High Quality Printing Fast Shipping. The majority of the following programs were written in the Python programming language. Quokka provides a "full-stack" Flask application plus a bunch of selected extensions to provide all the needed CMS admin features and a flexible-easy way to extend the platform with quokka-modules built following the Flask Blueprints pattern. This admin panel, released as an open-source project includes an SQLite database, SQLAlchemy ORM, and is fully integrated into Jinja2 templating system. Such features are instead. Take the case, which is more…. In this part of the tutorial, you will learn to return HTML pages through your Python script using the flask render_template method. In this three-part tutorial, we’ll build a CRUD (Create, Read, Update, Delete) employee management web app using Flask, a microframework for Python. The next step to building a simple Flask app is creating a homepage and dashboard page. Flask is a pretty robust framework for building web portals in python. Here is a synopsis of each video: Talks about the project and data pipeline. Now UI Dashboard comes packed with all plugins that you might need inside a project and documentation on how to get started. The Flask Monitoring Dashboard is an extension that offers 4 main functionalities with little effort from the Flask developer: Monitor the performance and utilization: The Dashboard allows you to see which endpoints process a lot of requests and how fast. However, in order for us to implement them, understanding of other programming languages and at least some of the basics of the your operating system are required. js - Data Dashboard - Part 2. Execute a responsive web-based dashboard UI with real-time graphs and control switches using Bootstrap and JavaScript. venv/bin/activate # Linux based systems $ \path\to\env\Scripts\activate # Windows users Now that we have the virtual environment setup, we can install Flask with this command: $ pip install flask. You can simply upload your code and Elastic Beanstalk automatically handles the deployment, from capacity provisioning, load balancing, auto-scaling to application health monitoring. In this codelab you will learn how to deploy a Python Flask web application to the App Engine Flexible environment. This is enabled through Flask, PyReact, and Pandas. The objective of this post is to explain how to configure a Flask server on the cloud and create a simple hello world application. In this tutorial, we're going to be discussing including templates, as compared to extending templates. Role: Full-Stack web-developer Dashboard for monitoring the company’s cloud environments states. Fortunately, you don’t need to worry about that too much because Nexmo provides a Python client. Flask AngularJS app powered by RESTful API – Setting Up the Application In the first and second of part of this tutorial series, we saw how to get started with creating a RESTful API using Python Flask and MySQL. js , which we will use with Python Flask Web Framework, to graph our data. On your Repls Dashboard, you create a new repl by clicking on "Start Coding Now" or the red button in the bottom right corner. Python offers many frameworks as bottle. Flask is a lightweight Python framework for web applications that provides the basics for URL routing and page rendering. Unit Testing Your Twilio App Using Python's Flask and Nose What If NCAA Basketball Players Were Paid? -An Analysis Interesting Projects, Tools and Libraries A "Writing Idiomatic Python" Video Series: Watch and Learn! This is a Kickstarter project that will turn the book "Writing Idiomatic Python" into a series of how-to videos. Today we will build a Restful API using Python Flask, SQLAlchemy using Postgres as our Database, testing using Python Unittest, a CI/CD Pipeline on Gitlab, and Deployment to Heroku. "Programmers are expensive" statement probably applies here as well. js renders the view. Talks about web scraping basics. The Python Flask app with have a new URL route. php they see /booking/. It contains the Python interpreter, editor, QPYPI, QRCode reader and some amazing features for Android. when I face any difficulty regarding python script Wasim will be my go to person. I've written a basic website status checker in Python/Flask which reads a list of URLs from a json file and cycles through them every x seconds to check they're online. Flask is a Python framework available under the BSD license. Starter pack for Bokeh plots in a Material Design dashboard interacting with Flask. Flask-Admin¶. You can replace those LEDs with any output (like a relay or a transistor). Textura® is the leading provider of collaboration and productivity tools for the construction industry. If you recall, extending templates was useful for things like headers and footers that would be on every page. Role: Full-Stack web-developer Dashboard for monitoring the company’s cloud environments states. This is enabled through Flask, PyReact, and Pandas. If you have no experience with Flask before I recommend reading my previous tutorials, they are great fun! Related course Python Flask: Make Web Apps with Python. November 01, 2014 10:40 / flask peewee python saturday-morning-hacks / 5 comments. To view a live deployment of the Flask-MonitoringDashboard, check this site. Select Python Flask Application. current_user. I develop innovative solutions and automate workflows to make life easier for you. I would like to automate this task in python by creating a GUI to display these statistics. Support for Python 2 and 3. Flask runs best in production with a reverse-proxy setup. In this video we will setup the dashboard and pull the articles from MySQL. From there, you can use any extensions you might need. Display pandas dataframes clearly and interactively in a web app using Flask. Set up RQ Dashboard to monitor queues, jobs, and workers. route ("/") def home (): return "Hello World!" The first line in our route is calling Python decorator. By default, Azure App Service looks for the Flask app object in a file named app. Welcome back to Serving Fiori Applications with Python Flask. This page provides an overview of installing the Flask Monitoring Dashboard. In this article, we will see how using Python Flask, Pandas and MongoDB you can develop an Analytical Dashboard over a weekend. The web server will be able to react to the user inputting dynamic content, turning your website into a web application capable of doing more than just showing static information. They also show how to expose REST APIs and integrate with the Flask framework. It starts from the very basic, but it is likely that you can directly go to Installing the Flask Monitoring Dashboard Package. View decorators in Flask allow us to add additional functionality to routes. Controlling Your System Using Alexa (Tutorial) I will be using Python/Flask for this purpose. At the end of this lesson, your website will look like this: As you see, we don't have plain text anymore, but text with various formats. We also need to ensure that once the. We also need to ensure that once the. You are correct, this is definitely a bit more involved and might need working knowledge of web. Python web application project templates. Flask is a really cool Python framework for building web applications. When extending your Flask application and adding more modules and files, you might need to pass some non-default FLASK_APP values. Material Dashboard, crafted by Creative-Tim - coded as open-source in Flask Microframework. Flask Dashboard Argon is built on top of a fully responsive, pixel-perfect Argon Dashboard design, crafted by Creative-Tim. Ready to go. For the web developer that wants to monitor the performance for their web-services, a solution is presented. This should work in a way that the pre-written queries retrieve this information at set time intervals and update the dashboard. Dash is Python framework for building web applications. Flask Dashboard Material - open-source Admin Panel coded in Flask. Protect your web app in two minutes. It enables you to build dashboards using pure Python. Building an app with Flask is a lot like writing standard Python modules, except some functions have routes attached to them. Flask is a versatile microframework capable of doing just about anything that you ask of it. If you have no experience with Flask before I recommend reading my previous tutorials, they are great fun! Related course Python Flask: Make Web Apps with Python. I would like to automate this task in python by creating a GUI to display these statistics. Talks about web scraping basics. 2 Released 2018-05-02) is "a microframework for Python based on Werkzeug, Jinja 2 and good intentions. We can run a Flask app to create a web page with a dashboard. Saturday morning hacks: Building an Analytics App with Flask. The -g flag is used to override that behavior to install bower globally since you will probably use bower for a number of projects. Flask-Perm is a Flask extension that can protect your view or function to be accessed by person who owns proper permission. Quokka is a flexible content management platform powered by Python, Flask and MongoDB. View Nok Lam Chan’s profile on LinkedIn, the world's largest professional community. Open you IBM Cloud catalog and write python in the search bar. You'll learn to use and combine over ten AWS services to create a pet adoption website with mythical creatures. It is inspired by the django-admin package, but implemented in such a way that the developer has total control of the look, feel and functionality of the resulting application. Creating a Web App From Scratch Using Python Flask and MySQL: Part 8 In the previous part of this series, we implemented image upload functionality for the users while adding a wish. Inspired in the Extends the Django Admin to include a extensible dashboard and navigation menu Customisable, modular dashboard application framework for Django. Introduction to Python Flask. The module Flask is to make web apps with Python. ai is an innovative applied AI company startup. This video series will walk through building a simple blogging analytics dashboard in Python. This is one of the reasons I liked Flask as a beginner, but it does mean that you have to put some thought into how to structure your code. For this tutorial, we will be using Python Flask for building a server that interact with MongoDB and render the html page that contains our charts. In recent years REST (REpresentational State Transfer) has emerged as the standard architectural design for web services and web APIs. $ mkdir rollout $ cd rollout $ virtualenv rollout New python executable in flask/bin/python Installing setuptoolsdone. py in the root project. Now UI Dashboard comes packed with all plugins that you might need inside a project and documentation on how to get started. The majority of the following programs were written in the Python programming language. The sample app you will deploy uses Python and Django. I don't want to spend a lot of time on how flask works, but if you aren't at least familiar w/ flask or any other web frameworks most of this article may not make sense. py to open the Python code in the pythonanywhere code editor window. This site provides an easy entry point into Pyramid. We'll be doing all of our development here. Shop Ball Python Flask designed by Stu_Taylor. Why Flask? As a micro-framework, Flask lets you build web services with very little overhead. CI/CD Pipelines for Python (Flask) — Docker Project to Kubernetes Second verse, same as the first: making containerization and deployment faster with Docker and Kubernetes. So far I have managed to create the code that will collect the data from sensor and push into database. We will also need Flask-RESTful, an extension for Flask which enables rapid development of REST API with minimal setup. This video tutorial has been prepared for anyone who. Unit Testing Your Twilio App Using Python's Flask and Nose What If NCAA Basketball Players Were Paid? -An Analysis Interesting Projects, Tools and Libraries A "Writing Idiomatic Python" Video Series: Watch and Learn! This is a Kickstarter project that will turn the book "Writing Idiomatic Python" into a series of how-to videos. This post is a bit long but the steps are quite simple:. This admin panel, released as an open-source project includes an SQLite database, SQLAlchemy ORM, and is fully integrated into Jinja2 templating system. js and Python Flask. It's known as a microframework because it relies on extensions for much of its functionality. The Message broker talks to the Celery worker. Time to add our bar chart. Flask â Templates - It is possible to return the output of a function bound to a certain URL in the form of HTML. Flask is a Python framework available under the BSD license. js or ruby) is on my shit list. Imagine we want to list all the details of local surfers, split by gender. [Hindi] Edit, Delete and File Upload - Web Development Using Flask and Python #15; 16. Step 7 - Test in Browser. from flask import Flask import flask_monitoringdashboard as dashboard app = Flask(__name__) dashboard. Introduction What you will make. js, React and React Js. co using Flask. Display pandas dataframes clearly and interactively in a web app using Flask. Python Tools for Visual Studio is a completely free extension, developed and supported by Microsoft with contributions from the community. Create a Python virtual environment for us to use. npm is another package manager used to manage Node modules. The StartupCommand parameter shown here is specific to the python-vscode-flask-tutorial example code, which defines the app in the startup. Welcome! Today we're going to start building a Flask app that calculates word-frequency pairs based on the text from a given URL. "Programmers are expensive" statement probably applies here as well. Deep work: Scientists, fluent in AI/machine learning, applying a new generation of workflows. We'll start by creating an admin user through the command line. In order to improve our Flask-MonitoringDashboard, we would like to hear from you!. access:app2 , where:. Flask provides a handy command, flask shell, that allows us to use an interactive Python shell for use with Flask apps. Flask-Perm is a Flask extension that can protect your view or function to be accessed by person who owns proper permission. The following are code examples for showing how to use forms. Step 7 - Test in Browser. Below is the architecture diagram of the application that we are going to build with AWS Lambda Flask. Our simple Flask route is in place but that's not very exciting. As a project to fulfill the capstone project requirement for my degree. This is a practical demonstration of application development with Python Flask, under the boilerplates category. In this article, we will see how using Python Flask, Pandas and MongoDB you can develop an Analytical Dashboard over a weekend. Sign in - Google Accounts - Google App Engine. [Hindi] Creating Admin Dashboard - Web Development Using Flask and Python #14; 15. Documentation for Python static files: Manage your static files. I would like to automate this task in python by creating a GUI to display these statistics. Renaming and Describing. 7, we want an environment that supports it and already has it installed. 3 Displaying our Tweets in the Flask Web Server. Quokka is a flexible content management platform powered by Python, Flask and MongoDB. There are two main ways to set up a Flask application on PythonAnywhere: your Dashboard and run. One of its major selling points is how simple it is to get started on building apps with it. 7, virtualenv, and pip. Create your Own KiteConnect Dashboard with the help of Flask Framework. This is the first post in a series about using the Nexmo APIs with Python. [Hindi] Edit, Delete and File Upload - Web Development Using Flask and Python #15; 16. Flask is a pretty robust framework for building web portals in python. Brief Flask Intro. Here are the files we'll be using in this tutorial part-6:. Here are the examples of the python api flask. class: center, middle # Scaling Flask with Kubernetes. Fortunately, you don’t need to worry about that too much because Nexmo provides a Python client. Next Level Data Visualization — Dashboard App with Bokeh & Flask Visualization matters. In this video we will setup the dashboard and pull the articles from MySQL. Run the command pip freeze > requirements. Flask App Builder, the web framework used by Superset offers many configuration settings. Wait for the application to start and now you should have a python application up and running. CherryPy powered web applications are in fact stand-alone Python applications embedding their own multi-threaded web server. There are two main ways to set up a Flask application on PythonAnywhere: your Dashboard and run. php they see /booking/. I have an existing Flask app, and I want to have a route to another app. Create a Python powered dashboard in under 10 minutes Published December 4, 2014 March 28, 2017 by modern. AgileVentures is a project incubator that stimulates and supports development of social innovations, open source and free software. Python decorators. The home page of our app displays a form for customers to submit support tickets. It's easy to add clean, stylish, and flexible dropdowns, buttons, and sliders to Plotly charts. I immediately had a plan for how to use it: I would make a home dashboard to show some useful information that is readable from around the living room. Running a Dash app within a Flask app. Talks about web scraping basics. They also show how to expose REST APIs and integrate with the Flask framework. One of its major selling points is how simple it is to get started on building apps with it. Deployed a web dashboard with employee presence and performance graphs for the HR. The app variable is an instance of Flask, so you can use it like any Flask app. The following are code examples for showing how to use forms. You need the. js renders the view. Flask Dashboard Material - open-source Admin Panel coded in Flask. This configuration contains "module": "flask",, which tells VS Code to run Python with -m flask when it starts the debugger. I recently took on a project where I needed to graph some data on a webpage using data I had queried from a database. The first example illustrates utilizing a simple Flask application that originates the data to be displayed by Chart. At the end of this lesson, your website will look like this: As you see, we don’t have plain text anymore, but text with various formats. Python Programming tutorials from beginner to advanced on a massive variety of topics. Here are the files we'll be using in this tutorial part-6:. I've named the app Project Dream Team, and it will have the following features: Users will be able to register and login as employees The administrator. A simple dashboard is a great way to measure how your business is performing in real time. We'll use this to convert blog post titles into URLs that look nice. It contains the Python interpreter, editor, QPYPI, QRCode reader and some amazing features for Android. I recently took on a project where I needed to graph some data on a webpage using data I had queried from a database. There is a default dashboard to add/create/authorize/revoke permission to a person or a group, which is convenient for you to bootstrap your permission management. He is a very good team player and also has knowledge of different simple methods to solve complex problems and come to the conclusion. Flask is a Python framework for creating web. Documentation for the IMMUNIO security solution. The Combat Engineer Recommended for you. Python offers many frameworks as bottle. The StartupCommand parameter shown here is specific to the python-vscode-flask-tutorial example code, which defines the app in the startup. With a small footprint, well documented and supported by a growing community, Flask can be a good choice to implement on top a nice production-ready Admin Dashboard. Controlling Your System Using Alexa (Tutorial) I will be using Python/Flask for this purpose. Package python-flask-openid-1. The homepage is what will be shown to the user when they visit the / URL, and the dashboard page (/dashboard) will be shown to the user once they've logged into their account. Flask (source code) is a Python web framework built with a small core and modularity in mind. PyCharm is the best IDE I've ever used. You can vote up the examples you like or vote down the ones you don't like. I will be using the famous Titanic Dataset. Time to add our bar chart. In the previous part of this series, we implemented the feature of uploading an image file for a blog post. Building a Simple Dashboard for Raspberry Pi SenseHat using Python, React and Bootstrap These days the comparison between React and Angular2 is a very hot topic. Saturday morning hacks: Building an Analytics App with Flask. Python Flask tutorial: Build a web app that recognizes hand-drawn digits. flask is a Python-backed web server that can be used to build arbitrary web sites, including those with Python plots that then function as flask dashboards, but is not specifically set up to make dashboarding easier. The next step to building a simple Flask app is creating a homepage and dashboard page. App Links Flask Dashboard Argon - product page. Easy to deploy so you can share results with others. You can also save this page to your account. python quickstart. Flask-Security is an opinionated Flask extension which adds basic security and authentication features to your Flask apps quickly and easily. from flask import Flask app = Flask (__name__) @app. We have written a Python package, called Pyxley, to not only help simplify the development of web-applications, but to provide a way to easily incorporate custom Javascript for maximum flexibility. This tutorial guides you through building a Python Flask app that uses a model trained with the MNIST data set to recognize digits that are hand drawn on an HTML canvas. Speed up your development with FlaskPlay, an open-source Flask Boilerplate. 7, we want an environment that supports it and already has it installed. In this article I'm going to show you how easy it is to create a RESTful web service using Python and the Flask microframework. $ mkdir rollout $ cd rollout $ virtualenv rollout New python executable in flask/bin/python Installing setuptoolsdone. js as a simple line chart. In this tutorial, we will build a simple Flask CRUD application, and add realtime functionality to it using the superpowers Pusher grants us. It also supports templates and iframes, as well as other data visualization libraries. This is enabled through Flask, PyReact, and Pandas. At the end of this lesson, your website will look like this: As you see, we don't have plain text anymore, but text with various formats. Welcome! Today we’re going to start building a Flask app that calculates word-frequency pairs based on the text from a given URL.