Parsing stock data python jobs
I'm seeking a skilled individual to develop an autonomous control system for a fleet of robots using ROS 2.(Or other software you can use, such as Python or Simulink) The fleet consists of 5 specialized robots divided into three categories: 2 surveyors, 2 fetchers and 1 Data Relay robot Key Separations: - Autonomous Vehicles: The surveyor robots will be autonomous vehicles. Any expertise dealing with such vehicles is highly appreciated. - SLAM Navigation and Cooperation: The autonomous vehicles should be able to self-navigate and cooperate effectively. Thus, I require freelancers with proficiency in SLAM (Simultaneous Localization and Mapping) navigation and an understanding of effective multi-robot cooperation techniques. - No specific Hardware Requirements: There a...
Seeking an experienced IT professional adept at executing tasks within a Windows framework. The primary project goals are: 1. Assisting in crafting a Virtual Machine (VM) on a Windows platform, and configuring it so that I can access it virtually. 2. Assisting with the creation of API processes in Python, particularly focusing on data extraction and insertion. Required skills include a robust understanding of Windows platforms, VM creation and management, Python programming, API integration and SQL database manipulation. Your comprehensive knowledge and practical experience in these fields will be key in successfully completing this project. More information on the API integration will be provided.
I'm in need of a proficient web developer to create a sleek and responsive real estate website. The core aim of this website will be property listings, property search, and property management functionality. The property types to be considered include Residentia...real estate businesses. - Proficiency in UX/UI for ease of use and aesthetic appeal. - Knowledge of database management to handle property listings effectively. Overall, the successful freelancer should have a portfolio showcasing similar projects. This will serve as a solid proof of their ability to deliver a website that meets my specific requirements. We need this website develop in React and Python. we don't want in other technologies. Please don't bid if you doesn't have experience. Your bid ...
I'm seeking a driven developer to customize my indicator for TradingView. I already have the base code, now I just need it customized with some things I cannot figure out how to do. List of what I want done is below. Experience in TradingView's Pine Script, financial markets,...the sensitivity 2 and the atr tp/sl's in the strategy panel on the bottom right. - I also want a strategy version of this indicator created. - Comprehensive understanding of and ability to use TradingView's Pinescript - Ability to design and develop new technical analysis indicators - Solid comprehension of market trends and financial data. The project is crucial and needs to be completed as soon as possible. If you have the skills and a track record in stock analysis scripting l...
I'm looking for an experienced full stack developer with proficiency in JavaScript, Python, and Ruby on Rails. The objective is to build a dynamic e-commerce website with the following features: - Payment Integration: Ensuring smooth and secure transactions is crucial for customer trust and user experience. - Product Search and Filter: An efficient, easy-to-use search and filter system will allow customers to quickly find their desired products. - Customer Review and Rating: This social proof tool will help customers make informed decisions and improve products and services based on feedback. - Job Post and Notification Service: A platform for posting job listings and notifying interested individuals. Ideal candidates must have experience in e-commerce websites and a portf...
I'm in need of a Full Stack Developer who is proficient with JavaScript, Python, and Ruby on Rails, though some flexibility is appreciated. The main goal is to create a fresh and innovative E-commerce website application from scratch. Ideal Skills: - Proficiency in JavaScript, Python, Ruby on Rails - Demonstrated experience in developing E-commerce sites - Good understanding of UI/UX principles This project is ideal for someone who can bring forward innovative ideas and provide strategic insight while also bringing my vision to life. Help me drive growth by creating a customer-centric shopping experience with smooth navigation that suits the taste of today's shopper.
Please read this file I sent - 1) It has TACO dataset link 2) The model should be trained in proper code and shouldn't be a single line. Proper training, based on YOLO algorithm. 3) Once model is trained, generate the result of model performance and visualise the result. 4) Write python script to take video as input and perform model on it and create webpage for it. Need it finished by April 10th.
... • Catalog Related Pages - Revamp related pages to maintain consistency with the new catalog layout. • Custom Snippets - Develop tailored snippets for a personalized touch. Ideally, all this should be accomplished within a one-month timeframe starting from the project inception date. Skills and Experience Required: - Extensive experience in Odoo web customization - Good knowledge of Python programming - Strong understanding of website layout aesthetics, preferably, product catalogs - Excellent problem-solving capabilities for developing custom filters and snippets Please note: I currently don't have any reference websites at hand, so I'll mostly rely on your technical and creative expertise to guide the design process. But be assured of my fu...
...see how well we work together. To get to know you better and where your specialties are, please rate yourself from 1-10 (10=best) on the following and include a brief explanation as why you gave yourself that rating: 1. Wordpress 2. Divi 3. Wordpress plugins (can you or have you ever built one?) 2. SEO experience 3. Javascript 4. Node.js 5. Angular 16 6. API development 7. HTML / CSS 8. PHP 9. Python 10. ERP systems 11. Tailwind 12. TaigaUI 13. Chrome Extensions (please rate yourself and provide any examples you might have) 14. Google Add-on 15. Keyword research tool 16. Web scripts 17. AI / ChatGPT experience 18. Web scraping 19. Logo design Next, please answer these "get to know you" questions: Why are you interested in this job/project? What's your favori...
...developer who is well versed in AI and ML to carry out several tasks for my upcoming project. The primary responsibilities of this developer will include: - Data analysis and modeling: Analysing and interpreting complex data sets will be a primary function of this role. - Algorithm development: Part of the project will require the development and implementation of innovative algorithms tailored to our specific objectives. - Integration with existing systems: Your tasks will also involve integrating newly developed features and algorithms with our existing systems. The ideal candidate for this job will have a strong proficiency in Python, as the entire project will be based around this programming language. Experience and interest in Natural Language Processing...
...is visually appealing, engaging, and aligned with the overall branding of the website. Feature Select Products: Showcase a curated selection of products that are likely to generate interest and conversions. Highlight key features, benefits, and any limited-time offers associated with these products. Create a Sense of Urgency: Implement design elements, such as countdown timers, limited stock notifications, or exclusive offers, to instill a sense of urgency and encourage visitors to take immediate action. Optimize Call-to-Action (CTA): Place prominent and compelling CTAs strategically throughout the landing page to guide visitors towards making a purchase. Ensure that CTAs are visually distinct and clearly communicate the desired action. Well-Linked Footer: Des...
I need a skilled professional to update my website's stock prices in real-time using excel. The project primarily involves: - Updating numerical data on my website - Ensuring accuracy and real-time updates - Using excel as the data source Ideal candidates will have: - Experience in data updating on websites - Proficiency in excel and data management - A good understanding of stock prices and real-time data management The goal of this project is to enhance the user experience on my website by providing accurate and real-time stock prices.
I'm in need of a highly skilled programmer well-versed in both Netlogo and Python. Having experience with the MESA extension is a plus. The task will be to convert a moderately complex agent-based model currently written in Netlogo into Python. The MESA extension is already installed and no additional setup will be necessary. The project's successful completion lies in the seamless conversion and integration of the model, solely focusing on code conversion. Demonstrable experience in similar projects would be an advantage. Here is the model that I need to convert:
As the project lead, I'm seeking a highly skilled developer to construct a Scrapy web crawler for multiple sites. Although I omitted website specifics for now, rest assured we will provide the necessary details post-engagement. The ideal candidate is capable of: - Building an optimized web crawler with Scrapy - Extracting text data proficiently from various web pages, accurately and efficiently For the application, please provide: - Detailed project proposals outlining your approach Experience in web crawling design and Scrapy framework are a must for this project. Your technical capacity to generate the explained particulars is critical for success here. This is a golden opportunity to exhibit your proficiencies and contribute to an exciting project. - The sites are di...
I'm currently struggling with running Python-written test cases on my local machine. Specifically, encountering some package installation problems that I'm unable to resolve. Below are my specific requirements: - Comprehensive experience in Python application development - Deep understanding of Python package installation and resolving related issues - Expertise in using AnyDesk or TeamViewer for troubleshooting and remote working - Working knowledge of Python environment configuration on Windows operating systems I would welcome any Python developer who can effectively assist me to run these test cases successfully on my local machine.
Python Data Scientist/Analyst Remote / Contract Experience : 2 – 6 Years We are actively seeking talented Data Scientists & Analysts proficient in Python to join our ambitious team dedicated to pushing the frontiers of AI technology. This opportunity is tailored for professionals who thrive on developing innovative solutions and aspire to be at the forefront of AI advancements. You will work with companies in the US looking to develop cutting-edge commercial and research AI solutions. Job Responsibilities: Write effective Python code to tackle complex issues, but also use your business sense and analytical abilities to glean valuable insights from public databases Communicate clearly with researchers and help the organization in realizing...
We are seeking someone to create multiple promotional vi...displayed on the TVs in our store. The television faces towards the street, meaning people passing by or driving past should be able to read it. We operate a gold buying business. The promotional videos should include information such as: We purchase: Scrap gold (photos of scrap gold) Fine gold (photos of gold bars) And more, with captivating animations. Can you create something like this for us? Stock images can be used for visuals. The ultimate goal is to create captivating, memorable videos that will imprint our brand in the minds of the general public. This project will require both imagination and expertise in marketing techniques. I'm excited to work with a committed, creative individual or team to bring this p...
More details: Which programming language would you prefer for the app development? Flutter What is the primary function of the deep learning video model in the app? Video Descriptor model What specific features do you want the app to have? In-app notifications, real time, real-time video capturing from camera
I need a script - preferably Python that will get rid of Distortion made by nileCam81 camera lences. I provide 5 pictures for testing. Script should process all images in a specified folder. You have to find in internet calibration data for that camera model
...appropriate permissions. - Data retrieval and filtering: The API should be equipped to fetch, sort, and filter data precisely and efficiently. - Data modification and creation: The system should allow for the creation and updating of existing data. In terms of data, the API will heavily handle User, Product, and Order data. The development demands a thorough understanding of these datasets and the ability to work with them seamlessly. Additionally, the API needs to integrate with an Email service. Experience in leveraging Django to connect with Email services is a crucial aspect for this job. Ideal freelancers for this project would have considerable experience in Django and REST API development, along with specific expertise in the mentione...
I'm in need of an experienced DevOps Engineer with experience in backend Flask app deployment on AWS. Your role will include but is not limited to: - Setting up and configuring the AWS environment with appropriate AWS products for the project. - Deploying a backend Flask application onto AWS. - Storing output data from the Flask application. - Creating API endpoints to be fetched from the frontend The ideal candidate would have a solid background in AWS and Python(Flask), be capable of optimizing app performance, and bring a problem-solving mindset. AWS knowledge is mandatory. If this sounds like you, please bid.
I'm in need of a Python developer with experience in socket programming and financial indicators to implement a system in the Zerodha Kite platform. Key aspects include: - RSI (Relative Strength Index) - Moving average over RSI - Open Interest (OI) - Pivot Points - Fetching the current prices via socket - Place orders (market, limit) through socket or API - In case of internet failures / socket data failures, retry of recent data is needed, state to be maintained and retrieved once internet is connected - Retaining pending orders - Extracting open positions - All functionalities should be modular and customizable - Should be able to give a demo of existing similar functionality if already done this kind of projects - Payment is only after verification of the de...
As a conscientious institution, we're seeking a savvy data scientist with a strong background in Python to dive deep into our bank dataset. Specifically, we're interested in performing: • Customer Segmentation Analysis • Fraud Detection • Risk Assessment The data has already been thoroughly cleaned, so you can hit the ground running. You'd be an especially good fit for this project if you excel at harnessing Python for data analytics and have a keen eye for revealing important patterns and insights. Let's work together to enhance our understanding of our customers and improve their banking experience. We're eager to learn from your expertise!
...materials should be used thoughtfully to avoid reliance on stock photography. However, photographs of Pensacola are acceptable as long as they align with the overall design aesthetic. Technical Requirements: The website must be developed using Bootstrap to ensure responsiveness. All source files including Photoshop, HTML, CSS, and JS must be provided upon completion. The code should be well-organized and clean to facilitate easy updates in the future. Load times are a priority, and the website should be optimized for speed without compromising on the design or functionality. Avoidance of Stock Photography: Our brand's visual identity should be distinct and personal. We prefer the use of provided graphics and photos over generic stock images. This will help cr...
Please respond with "I can do that" as the opening text to your bid. So many automated bids that it's not fair to real people. I need a person that know how to work with Make.com. I have a simple web page that is an announcement that I need a certain section extracted in the following JSON format. {"Fun..."Notice of Funding Opportunity Description":""} Please, only individuals who have proven experience in manipulating text, and with the particular methods for extracting information, should apply. A familiarity with platform will be an added advantage. Please provide proof of your experience and any relevant work in these areas when applying. I want the tools in to parse the data. This can become a bigger project. I will expect to s...
Private Project for Omar S. I'm urgently looking for a well-versed Python developer who can efficiently perform web scraping tasks on an unspecified website. While the exact platform has not been mentioned, you should be comfortable with scraping from popular sites like Amazon, eBay, or Craigslist. **Job Outline:** * Extract unspecified data from the assigned website **Required Skills:** * Excellent Python programming skills * Strong web scraping experience * Familiarity with extracting data like product names, prices, or reviews foremostly from popular commercial platforms As I need this project completed as soon as possible, an ability to adhere to strict deadlines is key. Your punctuality, combined with your professional skill set, will make you ...
I have LLama 2 chatbot prototype which runs on AWS Bedrock. It is still very simply (see the attached screenshot). It is programmed entirely in python and uses the python libraries. To make it ready for future front-end development, I want it to be written in JavaScript with react. The only addition at this point is a backend allowing to upload files for LLama 2.
I'm seeking a skilled pr...programmer to develop a tool that efficiently scans all stocks listed on both the NSE (National Stock Exchange) and BSE (Bombay Stock Exchange). Let's create a robust solution that can: - Scan on various timeframes (1 min, 5 min, 15 min, and 4 hours). - Effectively utilize the MSB (Moving Stop Break) Indicator within these timeframes. - The critical requirement is to capture and display the color of the bar within the MSB Indicator. This info needs to be printed in real-time on the output console. The ideal freelancer would have experience with stock market tools, a solid understanding of MSB indicators, and superior coding skills to ensure accuracy and efficiency in real-time data handling. Knowledge of stock marke...
I'm in need of a Telegram bot that can monitor developer activity in real time for the Solana cryptocurrency. I want this completed in Python. The project includes: - Ensuring it can effectively track if a developer to the Solana coin is selling coins - Establishing a notification system to alert me in real time of this event - Providing a user-friendly interface within Telegram to access this information Ideal skills/experience: - Demonstrated expertise with Telegram bot development - Extensive experience with Python - Understanding of cryptocurrency, particularly Solana - Prior work revealing similar end-to-end project management and technical capability Hence, for your application to be successful, you must clearly depict your past work relative to the above-men...
Introduction: Our company is seeking a skilled developer to enhance our existing location booking software. This system is crucial for our operations, enabling clients to book spaces for events. The software's frontend is developed in Vue, with the backend written in Python, and PostgreSQL serving as our database. The system is containerized using Docker Compose, facilitating development, testing, and deployment processes. Project Scope: The primary focus of this assignment is to refine and expand the frontend functionality of our booking system. However, the successful candidate must also possess the capability to make backend adjustments as necessary. The system architecture is divided into separate Git repositories for frontend and backend+database, each orchestrated with D...
I am looking for a skilled Python developer who can create a Python script that visite url from each view change proxxy . it should adestra direct link it script will like CPM softwere my budget less than $40 if you satisfie with this then apply on this bid I am eager to find a competent freelancer for this task. Thank you for considering my project.
I need a proficient developer to write a script for WP All Import. It should successfully import size and color variations in my Woocommerce store. Key tasks: - The script must focus on Size and Color Variations - The exact method for determining stock quantity isn't specified, leaving it open to your expertise and suggestions - Please also be prepared to discuss potential solutions for keeping stock quantities updated in the future Ideal skills: - Strong knowledge of Woocommerce and its variation options - Experience writing scripts for WP All Import - Proficiency in PHP, HTML, and CSS - Open communication and good problem-solving abilities Please note that the timeline for completion hasn't been specified, but your estimated delivery date should be included ...
As an investment manager, I'm seeking a financial analyst with a strong understanding of the Asia-Pacific (APAC) markets to conduct a detailed ...provide me with actionable strategies for fund management, inspired by recent and upcoming market events. Secondly, your report should highlight key market events that might impact these strategies. To assist in these objectives, you should include: - Information on stock market performance - Notable regulatory changes - Details of new prominent fund launches The ideal candidate for this project should have prior experience in financial analysis, particularly within the APAC region, and be able to translate complex market data into actionable strategies. Knowledge of fund management is a strong plus, as is the ability to ant...
I'm looking for a skilled professional to assist with an embedded software project that involves working with microcontrollers. Requirements: RTU shall be connected to following ETHERNET TCP IP/ MODBUS TCP IP/ SERIAL/ DNP3.0 SERIAL/ DNP 3.0 IP, etc. The ports Profibus and Profinet used protocol converter RTU connections GPRS link over DNP3 /Mod Bus TCP/IP /GSM GPRS servers. The RTU having functionalities analog input, analog output, digital input, digital output. RTU communication protocol: DNP3 level 4 & MQTT Both RTU Serial Comm Protocol: DNP3 level 4 Master/slave and peer-to-peer, Slave, Modbus Master/Slave DNP3 level 4 in TCP Master/Slave, UDP Master/Slave and peer-to-peer, Modbus TCP Server/Client, Modbus RTU in TCP Client.
I'm looking for a skilled C and Python developer with expertise in rebranding software. The project involves rebranding an open-source software by changing the User Interface, Software name, and logos and deploying backend/APIS/Connection on a server. Open source softwares are namely: 1) 2) Key Responsibilities: - Rebranding the User Interface (UI) with new color schemes and branding elements. - Making layout and design changes to reflect the new branding. - Replacing icons and logos with the new ones. - Deploying backend/APIS/Connection on a server - Generate installable files and configure with server Ideal Skills and Experience: - Proficiency in C and Python. - Should be aware on deploying the required assets on a server - Knowledge
We are looking for a Full stack Python developer who can help us to modify Web application that will interface with a AWS (EC2) cloud server. We need someone who has experience with API integration, MQTT, Sockets, MYSQL, S3 bucket, AWS IOT, Dynamo DB, Lambda function, ajax, java script with react, data prediction and analytics, git hub using Python. we can face some issue in web Application. 1. Application surfing slow 2. Application which have showing "Bad Gateway" error. so we want to do Application maintenance. As a candidate, we would like you to submit a proposal that outlines your experience with similar projects and how you can help us achieve our goals. Please include links to any past completed projects that are relevant to this job description. ...
I am creating a .exe and .mac program that creates chords and melodies for a user. Right now its in four separate programs and want it into one, and to connect with each other (such as chords generated on the piano roll connect with the custom piano roll, and each chord works) Alongside this, more features on the piano roll such as movin...glitches how such as some programs only do arpeggio and not chords (want it to do both) and how in (picture 4) not all chords work, can be extended into further with code access Another requirement is connecting it with Cryptlex, this will give it a license key to avoid pirating (or at least reduce it) This program uses PyGame and Music21 primary, but also Tkinter. Only knowledge requirement is Python The budget says "Small Budget"...
I'm in need of a Python developer to upgrade the API connection between my existing taxi booking software and my agents. The current connection is on Google Cloud, but I'm looking to upgrade to V2 from my agent. This requires a few specific functionalities and considerations. Specific Functionality Needed: - Real-time trip status updates - Driver location tracking - Passenger notifications Expected Volume of API Requests: - Less than 50 requests per hour Security Features: - Specific security features have not been finalized yet, but the selected freelancer may need to implement some standard safety measures for the API connection. Ideal Skills: - Strong experience in Python - Proven track record in API development and integration - Familiarity with Google Cloud...
...administration area for managing and analyzing the site's performance. Ensure the security and privacy of user data. Required Qualifications: Strong experience in web development, particularly with Python and frameworks such as Flask or Django. Experience in frontend development with HTML, CSS, and JavaScript, and ideally with frontend frameworks such as React, Vue.js, or Angular. Knowledge in integrating external APIs and data handling. Understanding of best UX/UI practices to create attractive and functional interfaces. Experience with the development of multilingual sites. Ability to write clean, efficient, and well-documented code. Experience with web security and data protection. Project Details: Remote work. The project is estimated...
...experience in Python machine learning and Google Colab environment. The main goal of this project is to create an AI system capable of diagnosing retinoblastoma through eye images. Key tasks include: - Building an algorithm that accurately compares new eye images with a provided dataset of 50 normal eye images and 50 images of retinoblastoma. - Ensuring seamless functionality on the Google Colab compiler. - The project entails supervised machine learning, as the datasets are labelled correctly. - Confirming the AI's ability to effectively diagnose retinoblastoma based on its comparison of the uploaded image and the image dataset. The successful candidate will have strong skills in machine learning algorithms, specifically for medical diagnosis purposes, as well as profic...
...monitoring. 3. **Develop a Receiver**: Write a Python script or application that listens for incoming messages from Slack through the webhook or event subscription. This receiver should parse the incoming messages and extract relevant information such as sender, timestamp, and message content. 4. **Forward Messages to Cortex XSOAR**: Once you've extracted the necessary information from the Slack messages, forward them to Cortex XSOAR using its API or integration mechanisms. You may need to transform the Slack message data into a format compatible with Cortex XSOAR's input requirements. 5. **Handle Authentication**: Ensure that your receiver authenticates with both Slack and Cortex XSOAR securely to access the necessary APIs and transmit data securely. ...
I am in need of a seasoned software engineer with intermediate expertise in Python. Your primary responsibility will be data processing using not only Python, but also complemented by Spark, Databricks, and Airflow. Therefore, prior experience with these is also expected. Ideal skills for this role include: - Intermediate to advanced skill level in Python - Experience with Spark, Databricks, and Airflow - Proficient in data processing tasks Your expertise in these areas will be integral to the success of this project and your problem-solving skills will be highly valued. I look forward to your proactive participation in this exciting project.
I am seeking a competent d...functionalities required include: 1. Sales Management: - Quotation Management: A system to efficiently handle all client quotations with ease and accuracy. - Sales Forecasting: An intelligent tool to anticipate future sales based on analysis of data and trends. 2. Customer Relationship Management: - Customer Support: A dedicated module to streamline and manage all customer service and support processes in one place. 3. Inventory Management: Analytics to monitor sales and product inventory, with a streamlined process for maintaining stock levels. The ideal candidate will have prior experience in customizing open source ERP CRM systems, coupled with a good grasp of sales and inventory management, customer support needs, and advanced pr...
...for a proficient developer who can create an automation script using Python. Scope of work: - Develop an automation solution in Python - Primarily the tasks include, but are not limited to, file management and data entry automation. What I need from you: - Expertise in Python and thorough knowledge of automation techniques. - Experience in automating file management and data entry tasks. - Proven ability to create efficient code, optimising for execution speed and the minimisation of resources. - Demonstrable skills in identifying and rectifying bottlenecks and bugs, to ensure optimal code performance. This position is suited to a freelancer who is detail-oriented, values efficiency, and has a deep understanding of Python. Please apply if ...
...India. The ideal freelancer for this job should have experience in financial franchise development and retail expansion, especially in the Stock market domain with a strong track record of success in the Indian market. Key responsibilities include: - Converting Digital Leads to Jon Immediately - Strategizing and executing the launch of new retail centers - Identifying and addressing any challenges and bottlenecks in the franchise network - Ensuring compliance with all legal and regulatory requirements for retail operations in India The successful candidate will have: - Strong interpersonal and negotiation skills - A deep understanding of the Indian stock market - Proven experience in franchise development and retail expansion - The ability to work independently and ta...
...true&sd=true 3 weeks deadline Skills and Experience: - Previous work with image classification models. - Experience in machine learning and artificial intelligence. - Ability to work with intricate image data related to landscapes. - Strong understanding of algorithms used in identifying and classifying object types. Framework The model is to be hosted using AWS services with endpoints to allow connection to a Typescript front-end. our current model is in MXNet python however, we are open to others. We would not provide the tagged data however, we can provide the un-tagged data we will need the model to identify roads with
I'm in need of an experienced mobile app developer who can help me build a trading application from scratch. Key Features Needed: - Real-time stock quotes - Portfolio management - Trading alerts Ideally, you will have only specific experience crafting trading applications or similar projects with demonstrated knowledge in handling financial data. A strong background in developing applications that require real-time data processing is crucial. You should be familiar with integrating APIs that help manage portfolios and create trading alerts. Understanding of the latest mobile app development trends and commitment to maintaining high quality standards throughout the project are required. Let's turn this concept into a successful app together.
I'm looking for a proficient Python developer with experience in stock price prediction algorithms. The key task is to create a model that can generate both real-time and historical price predictions. Key details: - The model's data source should be Google Finance. - Real-time price predictions should be updated every 5 minutes. Skills needed: - Experience with Python - Familiarity with Google Finance as a data source - Prior work with stock price prediction models.
