Block Matching Python Code

How to Create a Very Simple Program in Python. How can I use sed or ex to replace a block (multi-line code) with new block of text (code)? a line matching 3 and continuing to a the end of a list in Python. Regular expressions as a concept is not exclusive to Python at all. Ignore the nay sayers. Does anyone know what are the 2 output images velx and vely, and how is it posible to work with them?. Turn blocks into code and execute it. Figure 4-1 is a diagram of code with the blocks. Here are a few areas where whitespace is needed. 7 is used in most legacy code, Python 3 is the present and future of the Python language. Python if else statement. Our example will print out a greeting depending on the person's name. Download the needed binary files from wxWidgets Download page. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Sections are created with a section header and a colon followed by a block of indented text. Some Image and Video Processing: Motion Estimation with Block-Matching in Videos, Noisy and Motion-blurred Image Restoration with Inverse Filter in Python and OpenCV. You can document your own regular expressions in the same way. It is based on the cross platform Qt UI toolkit, integrating the highly flexible Scintilla editor control. Access the new random value operator. Learn how to code with Python and make a guessing game. The full-featured Python IDE for professional developers Powerful Debugger Intelligent Editor with Code Warnings Extensive Code Inspection and Navigation Project Management with Version Control Remote Development Unit Testing Refactoring Django and Other Framework Support Extensible in Python Available Product Source Code Free 30-day Trial. Get to the flag! Attach a block to the "when left arrow" block and press "Run" to move the player to the flag. Master Python loops to deepen your knowledge. Run C++ on window based environment. Linux, android, bsd, unix, distro, distros, distributions, ubuntu, debian, suse, opensuse, fedora, red hat, centos, mageia, knoppix, gentoo, freebsd, openbsd. Code within the finally block will always be executed after the try and catch blocks, regardless of whether an exception has been thrown, and before normal execution resumes. The mission of the Python Software Foundation is to promote, protect, and advance the Python programming language, and to support and facilitate the growth of a diverse and international community of Python programmers. 4, if your Python version is 3. But while Matlab is pretty fast, it is really only fast for algorithms that can be vectorized. You’ll put the break statement within the block of code under your loop statement, usually after a conditional if statement. Use any Python function in the expression. Each code section has a long if-elif-else test to see which button was clicked, and sets the color of the picture element appropriately. In this tutorial, you'll learn how to use Python if else to control your code. A Blocks / JavaScript code editor for the micro:bit powered by Microsoft MakeCode. I realized that PEP 340 templates can hide all sorts of control flow; for example, its example 4 (auto_retry()) catches exceptions and repeats the block up to three times. Switch-case statement is a powerful programming feature that allows you control the flow of your program based on the value of a. Regular expression matching a multiline block of text I'm having a bit of trouble getting a Python regex to work when matching against text that spans multiple lines. Create your app's blocks. Thank god Python does not allow the shitty switch statement implemented in C using jump tables and gotos. Use Python with Codey. Transport block segmentation, turbo encoding, rate matching, and code block concatenation procedures defined for LTE [9]. We can do that using control structures like if-else statements, for loops, and while loops. SimpleCV is an open source framework for building computer vision applications. Any following line also indented by four spaces is part of the block. com From 2006-2016, Google Code Project Hosting offered a free collaborative development environment for open source projects. This is computer vision made easy. search(pat, str) stores the search result in a variable named "match". matchTemplate() for this purpose. For instance, maybe the phone numbers you are trying to match have the area code set in parentheses. Checkbox detection python. You can use Idle or any programming editor you have on your computer (including Notes or Notepad). 7 , compile Python 2. Our Python editor is perfect for those who want to push their coding skills further. Gnumpy is a Python module that interfaces in a way almost identical to numpy, but does its computations on your computer’s GPU. In this tutorial, we’ll go over how to define your own functions to use in your coding projects. First of all, you need to enter MEX-Setup to determine if the compiler you want to use, follow the instructions step by step down the line. Tynker offers self-paced online courses for children to learn coding at home, as well as an engaging programming curriculum for schools and camps. You can vote up the examples you like or vote down the ones you don't like. There is no limit on the number of statements that can appear in the body of an if statement, but there has to be at least one. It also seems to be an ideal moment to introduce the Python block principle in combination with conditional statements. Access properties of feature geometry. This is either foreign to the website, or they will just block it entirely. The underlying supposition behind motion estimation is that the patterns corresponding to objects and background in a frame of video sequence move within the frame to form corresponding objects on the subsequent frame. OpenCV-Python Tutorials Below is a simple code snippet showing its usage for same image we used : Then each of these blocks are histogram equalized as usual. the condition) one by one and if a true condition is found the statement(s) block under that expression will be executed. It simply slides the template image over the input image (as in 2D convolution) and compares the template and patch of input image under the template image. Python Imaging Library (PIL) The Python Imaging Library (PIL) adds image processing capabilities to your Python interpreter. Which module in Python supports regular expressions? a) re b) regex c) pyregex d) none of the mentioned View Answer. When you think a part of your code might throw an exception, put it in a try block. With code2flow your can easily download and embed diagrams into Google Docs and Microsoft Word, or use our Atlassian Jira & Confluence plugins. Option 3: The Two- or Three-Step Dance (Replace before Matching) I'll expand on this option below when we look at cases more complex than "Tarzan". developers. Debug your Python code. In the Dragon Realm game, you created your own functions. When I try to do the same thing via a script it doesn’t match at all. Code block is open source platform with number of options. Now add in a good measure of the flexibility and convenience of languages such as Python and Perl. Here is the dialogue that I ran and works:. You can write code as you would in a source code editor, but you can choose which lines are interpreted together. It is extremely useful for extracting information from text such as code, files, log, spreadsheets or even documents. In the above case Python evaluates each expression (i. Rock band Make your own musical instruments with code blocks Happy birthday Make an online birthday card on a webpage Visit our projects site for tons of fun, step-by-step project guides with Raspberry Pi HTML/CSS Python Scratch Blender. Python source code utilities. In General Values "Build tools for others that you want to be built for you. Python has also been ported to the Java and. The code in a finally block is executed only if an exception occurs. See Code Snippets for details. Code Style¶. The code in a finally block is executed only if an exception occurs. Learn the fundamentals of programming to build web apps and manipulate data. Announcements about the project, new releases, patches, etc. This tutorial will walk you through the basics of how to build a blockchain from scratch. Fuzzy String Matching With Pandas and FuzzyWuzzy. Enter the codeblock. Access properties of feature geometry. There is one special case that could be managed in more specific way: the case in which you want to parse Python code in Python. Code Python 2. In the above case Python evaluates each expression (i. Turn blocks into code and execute it. 7 , run Python 2. In this Django tutorial, you create a simple Django app with three pages that use a common base template. If you haven't come across Blockly before, it's a library for building browser based graphical programming interfaces, based on interlocking blocks, with a Scratch style aesthetic: blockly. Run Selection/Line in Terminal (REPL) The Python: Run Selection/Line in Python Terminal command (Shift+Enter) is a simple way to take whatever code is selected, or the code on the current line if there is no selection, and run it in the Python Terminal. The following are code examples for showing how to use re. Django includes rich support for URL routing, page templates, and working with data. I think I have mangled this regex attempt. The goal of template matching is to find the patch/template in an image. py but with a graphic instead of a block. Free C, C++ and Fortran IDE built to meet the most demanding needs of its users. 7 is used in most legacy code, Python 3 is the present and future of the Python language. PointAtParameter node. For example, a nested loop or, in this case, a try-except block, is contained within a separate code block in the stack. Using code blocks. In this case, you need. SimpleCV is an open source framework for building computer vision applications. Access geoprocessing functions and objects. Pythonic wisdom: If. Be sure to download the Python extension for Visual Studio Code now to try out the above improvements. A prefix of 'b' or 'B' is ignored in Python 2; it indicates that the literal should become a bytes literal in Python 3 (e. It's handy when you have two related operations which you'd like to execute as a pair, with a block of code in between. You can run Python code in AWS Lambda. There are two subtleties you should remember when using this special sequence. Therefore, putting a '?' block in the last part of your pattern is not very useful, because the string will still match, whether or not there's a matching suffix. Get started with the tutorial Download Now. The important thing is that all the code in the code block must have the same number of spaces. The way this is handled in the Matlab tutorial is that we crop the template to the maximum size that will fit without going past the edge of the image. You can vote up the examples you like or vote down the ones you don't like. Access properties of feature geometry. Also, I think writing a search and replace filter is a good exercise for anyone wanting I get their feet wet with regular expressions, script writing, and filter scripts. To prepare the calculator to process Python, I set the parser to Python by clicking the radio button at the top of the Field Calculator. When invoking the Python 2 command line interpreter with the -t option, it issues warnings about code that illegally mixes tabs and spaces. This is not an official documentation. You end up with Ruby. Let us see a Python try exception example. New: The Python 3 version of the book and course material is available at www. Indeed, a high level of readability is at the heart of the design of the Python language, following the recognized fact that code is read much more often than it is written. I am looking for some advice on how I can improve the design and refactoring of the code. If you use another number of spaces (2, 6, 8), that's fine. There are two parameters to take note of. Snap! is a broadly inviting programming language for kids and adults that’s also a platform for serious study of computer science. The if else syntax is one of the most important pieces of Python syntax that you'll learn. How can I accomplish this task to hiding the source code from the user but running the code perfectly with the same performance. Sign up Exhaustive search Block Matching Algorithm to estimate the motion between two frame images. Setting up Code::Blocks on Windows By Thomas Carriero This tutorial gives you easy-to-follow instructions, with screenshots, for setting up a compiler (the MINGW compiler), a tool that will let you turn the code that you write into programs, and Code::Blocks, a free development environment for C and C++. Control structures are blocks of code that determine. Connect the Curve. Python’s meaningful indentation (one of its most controversial features) make it very hard to maintain this kind of code. Posting allowed only to moderators. First, this is the worst collision between Python's string literals and regular expression sequences. The following are code examples for showing how to use difflib. In contrast, the solution to don't match "Tarzan" that uses the regex trick on this page will be hauntingly simple. At that point, it. Simple Text Analysis Using Python - Identifying Named Entities, Tagging, Fuzzy String Matching and Topic Modelling Text processing is not really my thing, but here's a round-up of some basic recipes that allow you to get started with some quick'n'dirty tricks for identifying named entities in a document, and tagging entities in documents. Use other geoprocessing tools. Package authors use PyPI to distribute their software. The size of the tuple can’t change without fundamentally redefining the problem we’re solving. Functions are a mini-program within your program. The code block in a for loop (in python) has no curly braces nor an "end" keyword indicating the point where the block terminates. Python Editor. This paper describes a model of pattern matching implemented using the Python programming language. That is, the two features in both sets should match each other. Limits on the early version of MinGW. I can't use "continue" or "break" because the code block should execute for each item, and then break when no further items are available. If there exist a matching exception type in `except clause then it's handler is executed. The kind of code you are suggesting Python cannot do, is exactly the kind of code that creates a lot of bugs. Django includes rich support for URL routing, page templates, and working with data. In General Values "Build tools for others that you want to be built for you. For any new features, significant code changes, new drivers, or major bug fixes, please add a release note along with your patch. CodeCombat helps all educators teach students how to code in either JavaScript or Python, two of the most popular programming languages. Welcome to the world of mBlock 5! mBlock 5 is a block-based and code-based programming software designed for Science, Technology, Engineering, Arts and Mathematics (STEAM) education. In our last post, we went over a range of options to perform approximate sentence matching in Python, an import task for many natural language processing and machine learning tasks. pyDOE: The experimental design package for python¶. How Kids Learn Coding with Tynker. You would never write your own template-matching algorithm in Python — it just wouldn’t be fast enough. js, I struggled on the web for a few hours until I got a regular expression good enough for my purpose: match GitHub's Markdown code blocks, which means code inside tags like ```. In this case, you need. The stable marriage problem (also stable matching problem or SMP) is the problem of finding a stable matching between two equally sized sets of elements given an ordering of preferences for each element. Learn Python, a powerful language used by sites like YouTube and Dropbox. Fuzzy String Matching, also called Approximate String Matching, is the process of finding strings that approximatively match a given pattern. NET runtime. Learning Objectives Another approach to boost your pogramming skills is to learn how to code for Minecraft. The Best of the Best Practices (BOBP) Guide for Python. Functions This paper (and accompanying MATLAB source code) is a review of the block matching algorithms used for motion estimation in video compression. Today at PyCon 2019, Microsoft’s Python and Visual Studio Code team announced remote development in Visual Studio Code, enabling Visual Studio Code developers to work in development setups where their code and tools are running remotely inside of docker containers, remote SSH hosts, and Windows Subsystem for Linux (WSL), while you still get a. At Tynker, we are committed to empowering the next generation of makers with a foundation in programming and computational thinking. Source code can be downloaded from the codeblocks-python on github. html has been fixed and is now random. I love Python, web development, machine learning and open source. Switch the programming mode from "Blocks" to "Python" to start using Python. The try/except blocks. py) and that's where I am writing the code. Learn how to package your Python code for PyPI. Since the next instruction that we're jumping to with JUMP_FORWARD 88 is exiting the end of the try block found in our source code, POP_BLOCK is used to remove the top (current) block from the code block stack. Block comments can be used to explain more complicated code or code that you don't expect the reader to be familiar with. If you use another number of spaces (2, 6, 8), that’s fine. The following are code examples for showing how to use re. Checkbox detection python. A selection of snippets and a range of premade images and music give you a helping hand with your code. You use the if else statement to execute a code block in the if branch when the condition evaluates to true, and execute an alternative code block in the else branch when the condition evaluates to false. How to Create a Very Simple Program in Python. Of course IDLE is open source! It is part of the core Python codebase and is distributed with most Python versions on python. append(i*2) There are a few ways to measure the time it takes for a Python script to execute, but here's the best way to do it and I will explain why:. The actual Python code is enclosed in a. Code the blocks. Learn more about integrating Blockly in the Get Started docs for Web or Android. The Best of the Best Practices (BOBP) Guide for Python. The path is hard-code. Become a Member Donate to the PSF. OpenCV uses Python, Java, C, C++ and MATLAB interfaces while supporting Windows, Linux, Mac OS and Android. They are started by a :: at the end of the preceding paragraph and delimited by indentation. Reading and Writing the Apache Parquet Format¶. We will use Python subprocess module to execute system commands. Redirect link to header files needed for wxWidgets version 3. Below is a simple example of a Select Case statement that will write something different to the web browser depending on the name stored in the variable myName. In this guide, we'll be using Python version 3. In this post, we explain how to introduce the Python language in a fun and engaging way. In the previous section, we saw that os. It isn't such a problem with python code, because the language is supposed to take care of fixing accounting-type invariants for you. Module: Yet Another Python Templating Utility (YAPTU) Credit: Alex Martelli Templating is the process of defining a block of text that contains embedded variables, code, and other markup. Using code blocks. In order to make the script more flexible, let's accept an optional(!) directory name on the command line. Here's a little quirk with the markdown editor that you could use without having to install separate scripts. I am developing a paid application in python. Pattern Matching In Python. This block will attempt to catch any of those nasty exceptions, and then execute code to either recover from the error, or notify the user of the breakage. Real Time Signal Processing in Python. Let’s resume the simple example of articles on a blog, and let’s assume that each article has a number of likes. To start this tutorial off, let's first understand why the standard approach to template matching using cv2. This means blocks can exist within other blocks. msg = 'I grok Python!' Repeat a block over list (or string) indices for i in range(10): Python 3 cheatsheet (the basics) Created Date:. As with a regular if-statement, the else-block is optional. sprite_rotating. 'word:cat'). I love Python, web development, machine learning and open source. While using the regular expression the first thing is to recognize is. Points to remember. Java Example Solution Code; Java String Introduction (video) Java Substring v2 (video) Java String Equals and Loops; Java String indexOf and Parsing; Java If and Boolean Logic If Boolean Logic Example Solution Code 1 (video) If Boolean Logic Example Solution Code 2 (video) Java For and While Loops; Java Arrays and Loops; Java Map. match a wide range of international phone number Match itnegers Match IPv6 Address rtfValidation Escape one or more asterisks (\*+) LastName-Processing Free trial Match integers Find YouTube Links Match a valid hostname GC TEst markdown fenced code block Grading rows valid packaging slug Match or Validate phone number get theme details pcr. These things are called exceptions in Python. This guide will not cover how to compose a regular expression so it assumes you are already somewhat familiar. If the match is false, the search did not succeed, and there is no matching text. Automate the Boring Stuff with Python frames all of programming as these small triumphs; it makes the boring fun. Apart from asciidoc(1) and a Python interpreter, no other programs are required to convert AsciiDoc text files to DocBook or HTML. If all the selected lines are indented by more than four spaces, it will remove four spaces. The actual Python code is enclosed in a. The above two commands will work from anywhere inside the code block. Or, use Jupyter notebooks, which offer a great, interactive way to create Python code with a built-in interpreter. Drop the unfamiliar syntax and move to more conventional, file-based source code. Contributing Code. in two-way if tests to indicate the block of code. Hell throw in some constructors and destructors in C++ and you are guaranteed it will never work. Access geoprocessing functions and objects. However, I think it has some down falls. Currently it only supports accessing MaxMind databases. Most Code Clubs start out with Scratch, but when the time is right, you might want to try out some text-based languages such as Python in your club. We can do that using control structures like if-else statements, for loops, and while loops. MySQL Connector/Python is a standardized database driver for Python platforms and development. The underlying supposition behind motion estimation is that the patterns corresponding to objects and background in a frame of video sequence move within the frame to form corresponding objects on the subsequent frame. Cracking Codes with Python teaches complete beginners how to program in the Python programming language. Conversion Benefits and Tradeoffs. This opens a new section called the Pre-Logic Script Code window. A Blocks / JavaScript code editor for the micro:bit powered by Microsoft MakeCode. Docstrings may extend over multiple lines. Python 3 code static checker and UML diagram generator generate block-diagram image file from spec-text file Library for approximate and phonetic matching of. Setting up your computer for web scraper development. Notice that because an exception is raised in line 3, the execution of reset of the statements in the try block is skipped. The goal of template matching is to find the patch/template in an image. I think I have mangled this regex attempt. Since the next instruction that we're jumping to with JUMP_FORWARD 88 is exiting the end of the try block found in our source code, POP_BLOCK is used to remove the top (current) block from the code block stack. List any directory. Using code blocks. A work around for this is to just identify yourself as something else entirely. The conversion is designed to maximally preserve the original code's structure and syntax to preserve the value of the code and existing documentation and to allow a wide range of developers to maintain the code. In Python’s string literals, \b is the backspace character, ASCII value 8. The python program then plots the data using the python-matplotlib module. It has the usual graphics starting code, draws buttons and picture elements, and then has a number of code sections prompting the user to choose a color for a picture element. The Python if else commands act like a digital traffic cop, letting you define blocks of code that run when certain conditions are met. Gnumpy is a Python module that interfaces in a way almost identical to numpy, but does its computations on your computer’s GPU. Of course IDLE is open source! It is part of the core Python codebase and is distributed with most Python versions on python. Any following line also indented by four spaces is part of the block. The stable marriage problem (also stable matching problem or SMP) is the problem of finding a stable matching between two equally sized sets of elements given an ordering of preferences for each element. The "-v" is optional; it means. py but uses a Game class to organize the code. The size of the tuple can’t change without fundamentally redefining the problem we’re solving. Like Liked by 1 person. Points to remember. Sorry but this is just silly. Warmup-2 Medium warmup string/list problems with loops (solutions available). Ideone is an online compiler and debugging tool which allows you to compile source code and execute it online in more than 60 programming languages. broadly 3 types of Block - Genesis Block: First Block in the Blockchain known as Genesis block. Lowe in SIFT paper. The following code can be used to sort a numerical list in Python:. In the above case Python evaluates each expression (i. Simply writing two string literals together also. html is currently not pulling content after the last update. NetworkX is a Python package for the creation, manipulation, and study of the structure, dynamics, and functions of complex networks. How to use Ideone? Choose a programming language, enter the source code with optional input data and you are ready to go!. In fact, I don't understand why we need to browse all direction to compute cost aggregation? Has anyone tried to limit the lenght of this path. Python view. The following are code examples for showing how to use re. 03/13/2019; 12 minutes to read +2; In this article. Find out more about the latest features in version 2 of the Python Editor. Ignore the nay sayers. The following Matlab project contains the source code and Matlab examples used for block matching algorithms for motion estimation. Its goal is to provide common ground for all Elasticsearch-related code in Python; because of this it tries to be opinion-free and very extendable. Tynker offers self-paced online courses for children to learn coding at home, as well as an engaging programming curriculum for schools and camps. [Edit: A significantly expanded version of this series appears as a chapter in The Architecture of Open Source Applications, volume 4, as A Python Interpreter Written in Python. Image Classification in Python with Visual Bag of Words (VBoW) Part 1. You can use Idle or any programming editor you have on your computer (including Notes or Notepad). Thank god Python does not allow the shitty switch statement implemented in C using jump tables and gotos. What does the following Python code print out? (Note that this is a bit of a trick question and the code has what many would consider to be a flaw/bug - so read carefully). I am the developer of Recommendify, a recommender system for Shopify stores, and I have been a technical reviewer for two books, Mastering Python Design Patterns and Natural Language Processing with Java. python-geoip¶. Any feedback is highly welcome. This means that you can sort through the contents of headers in a Python program to find the exposures you need, identify the filters used, and see what processing has been done. In this study, however, we have focused only on one class of such algorithms, called the Block Matching Algorithms. The code match = re. GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Now add in a good measure of the flexibility and convenience of languages such as Python and Perl. The word rocket will thus be in match group 1. 1 64 10 50 1 100 1 100 1 1 abc {textVariable} abc {textVariable} {textVariable} abc abc abc abc 5 {listVariable} {listVariable} {listVariable} {listVariable}, 100 50 0 #ff0000 #3333ff 0. All video and text tutorials are free. A Python Editor for the BBC micro:bit, built by the Micro:bit Educational Foundation and the global Python Community. PyPI helps you find and install software developed and shared by the Python community. In the image above, the dark connected regions are blobs, and the goal of blob detection is to identify and mark these regions. To allow matching phone numbers that omit the local area code, enclose the first group of digits together with its surrounding parentheses and following separator in an optional, noncapturing group:. Functions can be created in a code block and recalled elsewhere in a Dynamo definition. Many scripting and programming languages, such as JScript, C#, and C++, make no attempt to match the code that is run with the actual physical lines typed into the text editor. Guido van Rossum is the creator of Python, one of the major programming languages on and off the web. matchTemplate is not very robust. broadly 3 types of Block - Genesis Block: First Block in the Blockchain known as Genesis block. HideShow is a minor mode similar to OutlineMode - it hides and shows blocks of text. Scratch to Python: Moving from Block- to Text-based Programming. Access geoprocessing functions and objects. All other languages have the. openpyxl is a Python library to read/write Excel 2010 xlsx/xlsm/xltx/xltm files. The below code-snippets were meant to show off Python's ability to handle LexicalClosures, matching the power of BlocksInRuby (or not). Dash is an Open Source Python library which can help you convert plotly figures into a reactive, web-based application. Python is an easy to use, fun and easy to learn programming language that is smaller and more compressed than C, C++, Java or binary. python-geoip¶. Conveniently manage your bitcoin, dogecoin, and litecoin in one place. py; Same idea as sprite_collect_blocks. 1 64 10 50 1 100 1 100 1 1 abc {textVariable} abc {textVariable} {textVariable} abc abc abc abc 5 {listVariable} {listVariable} {listVariable} {listVariable}, 100 50 0 #ff0000 #3333ff 0. 17 hours ago · Using above concept from python’s NLTK library, lets build a simple chatbot without using any of the Machine Learning or Deep Learning Algorithms. [Edit: A significantly expanded version of this series appears as a chapter in The Architecture of Open Source Applications, volume 4, as A Python Interpreter Written in Python. Powered by the global Python Community. Connect the Curve. Our Python editor is perfect for those who want to push their coding skills further. When an impasse is discovered, the code unwinds and the next valid path is taken. Competition for market share among retail chains has been tough on a global scale, and it is none too different in Cambodia. I am running a Field Calculation within a Python script in ArcGIS. This tutorial will help you to Learn Python. Conversion to Python can be the right choice for a project in a number of situations. Rock band Make your own musical instruments with code blocks Happy birthday Make an online birthday card on a webpage Visit our projects site for tons of fun, step-by-step project guides with Raspberry Pi HTML/CSS Python Scratch Blender. In Python, the break statement provides you with the opportunity to exit out of a loop when an external condition is triggered. indicating the current directory. Free download Code::Blocks (CodeBlocks) latest version 2019 for windows 10 [64 bit, 32 bit]. python emit_log_topic. Learn vocabulary, terms, and more with flashcards, games, and other study tools. query function is where the query is build.