577 Courses in Liverpool

Overview This Leadership and Management course is essential reading for anyone wanting to improve their skills and reach their potential as a team leader or manager. The course is fully interactive and prompts you to assess your own leadership or management style and then learn how to develop it further. The course covers key topics such as effective communication, the importance of managing your time well, how to build solid relationships with your team, mental fitness and taking care of your own well-being, and how to better solve workplace problems.

LPIC-1 training course description This five day hands on course provides a comprehensive coverage of core Linux administration tasks. The course covers generic Linux and is available for any Linux distribution required. It closely follows the LPIC curriculum allowing delegates to achieve the relevant certification if required. What will you learn Administer & configure Linux systems. Maintain Linux by handling disk space and taking regular backups. Manage software packages. Perform basic troubleshooting. Maintain a secure Linux system. Describe the organisation and implementation of the filesystem. LPIC-1 training course details Who will benefit: System administrators. Network administrators. Prerequisites: Linux fundamentals (LPI 010) Duration 5 days LPIC-1 training course contents Part I Exam 101 Exploring Linux Command-Line Tools Using a Shell, Shell Configuration, Environment Variables, Getting Help, Streams, Redirection and Pipes, Processing Text Using Filters, Manipulating files, Regular Expressions, grep,sed. Managing Software Package Concepts, Comparison of package formats, RPM, rpm Commands, Yum, Debian Packages, dpkg, apt-cache, apt-get, dselect, aptitude, Converting Between Package Formats, Dependencies and Conflicts, Startup Script Problems, Shared Libraries, Library Management, Managing Processes, the Kernel: The First Process, Process Lists, Foreground & Background Processes, Process Priorities, Killing Processes. Configuring Hardware Configuring Firmware and Hardware, IRQs, I/O Addresses, DMA Addresses, Boot Disks, Coldplug and Hotplug Devices, Configuring Expansion Cards and PCI Cards, Kernel Modules, USB Devices, Linux USB Drivers, Configuring Hard Disks, Partitioning Systems, LVM, Common Layouts, Creating Partitions and Filesystems, Maintaining Filesystem Health, Tuning, Journals, Checking Filesystems, Monitoring Disk Use, Mounting and Unmounting Filesystems. Managing Files File Management Commands, File Naming and Wildcards, File Archiving, Links, Directory Commands, File Ownership and Group, File access control, Permissions, chmod, Defaults, File Attributes, Disk Quotas, Enabling and setting Quotas, Locating Files, The FHS. Booting Linux and Editing Files Installing Boot Loaders, GRUB Legacy, GRUB 2, Alternative Boot Loaders, the Boot Process, Boot Messages, Runlevels and the Initialization Process, Runlevel Functions, Runlevel Services, Alternative Boot Systems , Upstart, system. Part II Exam 102 265 Securing the X Window System Localization, Configuring Basic X Features, X Server Options, Methods of Configuring X, X Display Information, X Fonts, The X GUI Login System, XDMCP Server, Using X for Remote Access, Screen Display Settings, Setting Your Time Zone, Your Locale, Configuring Printing, Conceptualizing the Linux Printing Architecture, Understanding PostScript and Ghostscript, Running a Printing System, Configuring CUPS, Monitoring and Controlling the Print Queue. Administering the System Managing Users and Groups, Tuning User and System Environments, Using System Log Files, Understanding syslogd , Setting Logging Options, Manually Logging Data, Rotating Log Files, Reviewing Log File Contents, Maintaining the System Time, Linux Time Concepts, Manually Setting the Time, Using NTP, Running Jobs in the Future, Understanding the Role of cron, Creating System cron Jobs, Creating User cron Jobs, Using anacron, Using at. Configuring Basic Networking TCP/IP, Network Hardware, Network Addresses, Hostnames, Network Ports, Configuring Linux for a Local Network, Configuring with DHCP, Static IP Address, Configuring Routing, Using GUI Configuration Tools, ifup and ifdown, Diagnosing Network Connections, Testing Connectivity, Tracing a Route, Checking Network Status , Examining Network Traffic, Additional Tools. Writing Scripts, Configuring Email, and Using Databases The Shell Environment, Aliases, Shell Configuration Files, Writing Scripts, Commands, Variables, Conditional Expressions, Loops, Functions, Managing Email, Choosing Email Software, Securing Your Email Server, Managing Data with SQL, Picking a SQL Package, Understanding SQL Basics, Using MySQL Securing Your System Administering Network Security, Super Server Restrictions, Disabling Unused Servers, Administering Local Security, Securing Passwords, Limiting root Access, Setting Login, Process, SUID/SGID Files, Configuring SSH, Using GPG, Generating, Importing and Revoking Keys, Encrypting and Decrypting Data, Signing Messages and Verifying Signatures.

UNIX system administration training course description This five day hands on course provides a comprehensive coverage of core UNIX administration tasks. The course covers generic UNIX and is available for any UNIX distribution required. What will you learn Administer & configure UNIX systems. Maintain UNIX by handling disk space and taking regular backups. Manage software packages. Perform basic troubleshooting. Maintain a secure UNIX system. Describe the organisation and implementation of the filesystem. UNIX system administration training course details Who will benefit: System administrators Network administrators. Prerequisites: UNIX fundamentals. Duration 5 days UNIX system administration training course contents Part 1 Exploring UNIX command-line tools Using a shell, shell configuration, environment variables, getting help, streams, redirection and pipes, processing text using filters, manipulating files, regular expressions, grep, sed. Managing software Package concepts, comparison of package formats, RPM, rpm commands, yum, dpkg, apt-cache, apt-get, dselect, aptitude, converting between package formats, dependencies and conflicts, startup script problems, shared libraries, library management, managing processes, the kernel: the first process, process lists, foreground & background processes, process priorities, killing processes. Configuring hardware Configuring firmware and hardware, RQs, I/O addresses, DMA addresses, Boot disks, coldplug and hotplug devices, configuring expansion cards and PCI cards, kernel modules, USB devices, UNIX USB crivers, configuring hard disks, partitioning systems, LVM, common layouts, creating partitions and filesystems, maintaining filesystem health, tuning, journals, checking filesystems, monitoring disk use, mounting and unmounting filesystems. Managing files File management commands, file naming and wildcards, file archiving, links, directory commands, file ownership and group, file access control, permissions, chmod, defaults, file attributes, disk quotas, enabling and setting quotas, locating files, the FHS. Booting UNIX and editing files Installing boot loaders, GRUB legacy, GRUB 2, alternative boot loaders, the boot process, boot messages, runlevels and the initialization process, runlevel functions, runlevel services, alternative boot systems, upstart, system. Part 2 Configuring the X window system Localization, configuring basic X features, X server options, methods of configuring X, X display information, X fonts, the X GUI login system, XDMCP server, using X for remote access, screen display settings, setting your time zone, your locale, configuring printing, conceptualizing the UNIX printing architecture, understanding PostScript and ghostscript, running a printing system, configuring CUPS, monitoring and controlling the print queue. Administering the system Managing users and groups, tuning user and system environments, using system log files, understanding syslogd, setting logging options, manually logging data, rotating l;og files, reviewing log file contents, maintaining the system time, UNIX time concepts, manually setting the time, using NTP, running jobs in the future, understanding the role of cron, creating system cron jobs, creating user cron jobs, using anacron, using at. Configuring basic networking TCP/IP, network hardware, network addresses, hostnames, network ports, configuring UNIX for a local network, configuring with DHCP, static IP address, configuring routing, using GUI configuration tools, ifup and ifdown, diagnosing network connections, testing connectivity, tracing a route, checking network status , examining network traffic, additional tools. Writing scripts, configuring email, and using databases The shell environment, aliases, shell configuration files, writing scripts, commands, variables, conditional expressions, loops, functions, managing email, choosing email software, securing your email server, managing data with SQL, picking a SQL package, understanding SQL basics, using MySQL. Securing your system Administering network security, super server restrictions, disabling unused servers, administering local security, securing passwords, limiting root access, setting login, process, SUID/SGID files, configuring SSH, using GPG, generating, importing and revoking keys, encrypting and decrypting data, signing messages and verifying signatures.

Overview Financial Analysis and Decision Making specifies a financial outline to support the life cycle approach of managing tedious projects over a long time scale. This course includes the advanced level of accounting structures which are required to insert knowledgable information in order to make decisions or to support the decision-making process where accounting and financial information overlaps other decision-making processes. In order to manage the growth of the organisation and measure the profitability it is very important to do a financial analysis. This course will take you through different models of accounting and finance which is helpful for the decision-making process thereby helping ensure sustainable growth and success.

About this training course Gas-lift is one of the predominant forms of artificial lift used for lifting liquids from conventional, unconventional, onshore and offshore assets. Gas-lift and its various forms (intermittent lift, gas-assisted plunger lift) allows life of well lift-possibilities when selected and applied properly. This 5-day training course is designed to give participants a thorough understanding of gas-lift technology and related application concepts. This training course covers main components such as application envelope, relative strengths and weaknesses of gas-lift and its different forms like intermittent lift, gas-assisted plunger lift. Participants solve examples and class problems throughout the course. Animations and videos reinforce the concepts under discussion. Unique Features: Hands-on usage of SNAP Software to solve gas-lift exercises Discussion on digital oil field Machine learning applications in gas-lift optimization Training Objectives After the completion of this training course, participants will be able to: Understand the fundamental theories and procedures related to Gas-Lift operations Easily recognize the different components of the gas-lift system and their basic structural and operational features Be able to design a gas-lift installation Comprehend how digital oilfield tools help address ESP challenges Examine recent advances in real-time approaches to the production monitoring and lift management Target Audience This training course is suitable and will greatly benefit the following specific groups: Production, reservoir, completion, drilling and facilities engineers, analysts, and operators Anyone interested in learning about implications of gas-lift systems for their fields and reservoirs Course Level Intermediate Advanced Training Methods The training instructor relies on a highly interactive training method to enhance the learning process. This method ensures that all participants gain a complete understanding of all the topics covered. The training environment is highly stimulating, challenging, and effective because the participants will learn by case studies which will allow them to apply the material taught in their own organization. Course Duration: 5 days in total (35 hours). Training Schedule 0830 - Registration 0900 - Start of training 1030 - Morning Break 1045 - Training recommences 1230 - Lunch Break 1330 - Training recommences 1515 - Evening break 1530 - Training recommences 1700 - End of Training The maximum number of participants allowed for this training course is 20. This course is also available through our Virtual Instructor Led Training (VILT) format. Prerequisites: Understanding of petroleum production concepts. Each participant needs a laptop/PC for solving class examples using software to be provided during class. Laptop/PC needs to have a current Windows operating system and at least 500 MB free disk space. Participants should have administrator rights to install software. Trainer Your expert course leader has over 35 years' work-experience in multiphase flow, artificial lift, real-time production optimization and software development/management. His current work is focused on a variety of use cases like failure prediction, virtual flow rate determination, wellhead integrity surveillance, corrosion, equipment maintenance, DTS/DAS interpretation. He has worked for national oil companies, majors, independents, and service providers globally. He has multiple patents and has delivered a multitude of industry presentations. Twice selected as an SPE distinguished lecturer, he also volunteers on SPE committees. He holds a Bachelor's and Master's in chemical engineering from the Gujarat University and IIT-Kanpur, India; and a Ph.D. in Petroleum Engineering from the University of Tulsa, USA. Highlighted Work Experience: At Weatherford, consulted with clients as well as directed teams on digital oilfield solutions including LOWIS - a solution that was underneath the production operations of Chevron and Occidental Petroleum across the globe. Worked with and consulted on equipment's like field controllers, VSDs, downhole permanent gauges, multiphase flow meters, fibre optics-based measurements. Shepherded an enterprise-class solution that is being deployed at a major oil and gas producer for production management including artificial lift optimization using real time data and deep-learning data analytics. Developed a workshop on digital oilfield approaches for production engineers. Patents: Principal inventor: 'Smarter Slug Flow Conditioning and Control' Co-inventor: 'Technique for Production Enhancement with Downhole Monitoring of Artificially Lifted Wells' Co-inventor: 'Wellbore real-time monitoring and analysis of fracture contribution' Worldwide Experience in Training / Seminar / Workshop Deliveries: Besides delivering several SPE webinars, ALRDC and SPE trainings globally, he has taught artificial lift at Texas Tech, Missouri S&T, Louisiana State, U of Southern California, and U of Houston. He has conducted seminars, bespoke trainings / workshops globally for practicing professionals: Companies: Basra Oil Company, ConocoPhillips, Chevron, EcoPetrol, Equinor, KOC, ONGC, LukOil, PDO, PDVSA, PEMEX, Petronas, Repsol, , Saudi Aramco, Shell, Sonatrech, QP, Tatneft, YPF, and others. Countries: USA, Algeria, Argentina, Bahrain, Brazil, Canada, China, Croatia, Congo, Ghana, India, Indonesia, Iraq, Kazakhstan, Kenya, Kuwait, Libya, Malaysia, Oman, Mexico, Norway, Qatar, Romania, Russia, Serbia, Saudi Arabia, S Korea, Tanzania, Thailand, Tunisia, Turkmenistan, UAE, Ukraine, Uzbekistan, Venezuela. Virtual training provided for PetroEdge, ALRDC, School of Mines, Repsol, UEP-Pakistan, and others since pandemic. POST TRAINING COACHING SUPPORT (OPTIONAL) To further optimise your learning experience from our courses, we also offer individualized 'One to One' coaching support for 2 hours post training. We can help improve your competence in your chosen area of interest, based on your learning needs and available hours. This is a great opportunity to improve your capability and confidence in a particular area of expertise. It will be delivered over a secure video conference call by one of our senior trainers. They will work with you to create a tailor-made coaching program that will help you achieve your goals faster. Request for further information post training support and fees applicable Accreditions And Affliations

Overview Internal control, as defined by accounting and auditing, is a process for assuring an organization's objectives in operational effectiveness and efficiency, reliable financial reporting, and compliance with laws, regulations and policies. It is very important for the organisation to have a smooth flow of accounting as it plays a very important role in the development of the organisation. Financial Managers or any person who deals with Accounts need to see that the company accounts are very updated and are free from any risks that can become a problem during the time of Auditing.  This course will feed you with all the skills required to have a good Internal Management process it is important to analyse Risk Management to see if the process is working efficiently and measures the effectiveness of controls put in place to alleviate risks. 

Lean Six Sigma Green Belt Certification Program: In-House Training This learning series is designed to enable participants to fulfill the important role of a Lean Six Sigma Green Belt and to incorporate the Lean Six Sigma mindset into their leadership skills. Green Belt is not just a role, it is also a competency required for leadership positions at many top companies. This learning series is designed to enable participants to fulfill the important role of a Lean Six Sigma Green Belt and to incorporate the Lean Six Sigma mindset into their leadership skills. With a real-world project focus, the series will teach the fundamental methodology, tools, and techniques of the Define, Measure, Analyze, Improve and Control Process Improvement Methodology. This course is delivered through sixteen 3-hour online sessions. What you Will Learn At the end of this program, you will be able to: Identify strategies for effectively leading high performing process improvement teams Analyze whether projects align with business strategy Apply process improvement methodologies to DMAIC steps, based on real world scenarios Explain ways to appropriately respond to process variation Distinguish among best practice problem solving methodologies Evaluate and effectively communicate data-driven decisions, based on real world scenarios Introduction Lean Six Sigma & quality The vision The methodologies The metric Project Selection Why Projects Random idea generation Targeted idea generation CTQs (Critical to Quality) & projects Project screening criteria Quick improvements Introduction to Define Project Planning Developing the core charter Developing a project charter Facilitation Process Management Business process management Top-down process mapping Voice of the Customer Voice of Customer Stakeholder analysis Communication planning Kicking off the project Define Summary Introduction to Measure Data Collection Fact-based decision making Data sampling Operations definitions Data collection plan Measurement system analysis Graphical Statistics for Continuous Data Meet Six SigmaXL Graphical & statistical tools Data stratification Graphical Statistics for Discrete Data Pareto analysis Dot plots Plotting data over time: Looking for patterns Variation Concepts Variation is reality Special Cause and Common Cause variation Example of standard business reporting Individuals Control Chart Process Capability Genesis of process capability Calculating the metrics of Six Sigma Yield metrics: Measuring process efficiency Cost of Poor Quality The Cost of Poor Quality (COPQ) Cost of Quality categories Calculating the Cost of Poor Quality Measure Summary Introduction to Analyze Process Analysis Introduction to process analysis Value-added analysis Cycle time analysis WIP & pull systems Analyzing bottlenecks and constraints Cause & Effect Analysis Fishbone/Ishikawa diagram 5-Whys analysis Graphical & statistical tools Advanced Analysis Why use hypothesis rests? Hypothesis tests Correlation and regression analysis Analyze Summary Introduction to Improve Solutions Creativity techniques Generating alternative solutions Solution selection techniques Introduction to Design of Experiments Introduction to DOE DOE activity Error Proofing Failure mode & effect analysis Poka-Yoke Project Management Fundamentals Successful teams Project roles Conflict management Standardization Standardization The Visual Workplace 5S Piloting & Verifying Results What is a pilot? Evaluating results Improve Summary Introduction to Control Statistical Process Control Review of Special & Common Cause variation Review of Individual Control Chart P-Chart for discrete proportion data Transition Planning Control plan Project closure Control Summary Summary and Next Steps

Programming in HTML5 with CSS course description This course provides an introduction to HTML5, CSS3, and JavaScript. It is an entry point into both the Web application and Windows Store apps training paths. The course focuses on using HTML5 / CSS3 / JavaScript to implement programming logic, define and use variables, perform looping and branching, develop user interfaces, capture and validate user input, store data, and create well-structured application. What will you learn Create and style HTML5 pages. Use JavaScript. Style HTML5 pages by using CSS3. Use common HTML5 APLs in interactive Web applications. Create HTML5 Web pages that can adapt to different devices and form factors. Enhance the user experience by adding animations to the HTML5 page. Programming in HTML5 with CSS course details Who will benefit: Website developers. Prerequisites: HTML5 development fundamentals. Duration 5 days Programming in HTML5 with CSS course contents Overview of HTML and CSS Overview of HTML, Overview of CSS, Creating a Web Application by Using Visual Studio 2012. Hands on Exploring the Contoso Conference Application. Creating and Styling HTML5 Pages Creating an HTML5 Page, Styling an HTML5 Page. Hands on Creating and Styling HTML5 Pages. Introduction to JavaScript Overview of JavaScript Syntax, Programming the HTML DOM with JavaScript, Introduction to jQuery. Hands on Displaying Data and Handling Events by Using JavaScript. Creating Forms to Collect and Validate User Input Overview of Forms and Input Types, Validating User Input by Using HTML5 Attributes, Validating User Input by Using JavaScript. Hands on Creating a Form and Validating User Input. Communicating with a Remote Data Source Sending and Receiving Data by Using XMLHTTPRequest, Sending and Receiving Data by Using jQuery AJAX operations. Hands on Communicating with a Remote Data Source. Styling HTML5 by Using CSS3 Styling Text, Styling Block Elements, CSS3 Selectors, Enhancing Graphical Effects by Using CSS3. Hands on Styling Text and Block Elements using CSS3. Creating Objects and Methods by Using JavaScript Writing Well-Structured JavaScript, Creating Custom Objects, Extending Objects. Hands on Refining Code for Maintainability and Extensibility. Creating Interactive Pages using HTML5 APIs Interacting with Files, Incorporating Multimedia, Reacting to Browser Location and Context, Debugging and Profiling a Web Application. Hands on Creating Interactive Pages by Using HTML5 APIs. Adding Offline Support to Web Applications Reading and Writing Data Locally, Adding Offline Support by Using the Application Cache. Hands on Adding Offline Support to a Web Application. Implementing an Adaptive User Interface Supporting Multiple Form Factors, Creating an Adaptive User Interface. Hands on Implementing an Adaptive User Interface. Creating Advanced Graphics Creating Interactive Graphics by Using Scalable Vector Graphics, Programmatically Drawing Graphics by Using a Canvas. Hands on Creating Advanced Graphics. Animating the User Interface Applying CSS Transitions, Transforming Elements, Applying CSS Key-frame Animations. Hands on Animating User Interface Elements. Web Sockets for Real-Time Communications Introduction to Web Sockets, Sending and Receiving Data by Using Web Sockets. Hands on Implementing Real-Time Communications by Using Web Sockets. Creating a Web Worker Process Introduction to Web Workers, Performing Asynchronous Processing by Using a Web Worker. Hands on Creating a Web Worker Process.

Overview Any business life is completely dependent on Sales and Marketing. It delivers a significant business benefit. Providing effective training in Sales and Marketing helps boost sales, increase profit, create a brand image and also improve customer satisfaction. This course has been designed to gain essential skills in Marketing and Sales, learn new sales techniques and how to reach the right audience at the right time. If there is a shortage of skills or resources within the business, you might want to provide this specially designed-training to help develop those skills.  This course will help review overall sales strategies and how marketing can contribute in order to achieve a desired positive outcome. It will set measurable objectives and standards within the team and will boost the confidence in their performance and achieve the objectives.  This course will discover various sales and marketing techniques and will provide the participants with more tools and techniques to increase individual and team sales. It will highlight all of the major components required to build good connections, know the consumer and their needs and gain commitment to a sale.

Advanced Python training course description This course caters to network engineers aiming to enhance both their Python proficiency and network automation skills. Delving deeper into key areas such as netmiko, Nornir, and ncclient, we also focus on automating network testing and validation. Participants gain greater confidence working with Python functions, classes, objects, and error handling. The course additionally introduces more libraries like Scrapli, TTP, pyATS, Genie, pybatfish, and Suzieq, which cover parsing strategies, automation testing, validation, network analysis, observability, and telemetry. The curriculum also encompasses concurrency techniques. What will you learn Write Python modules and functions. Evaluate techniques to parse unstructured data. Use NETCONF filters. Handle Python errors effectively (try, assert…). Use postman. Automate testing and validation of the network. Use scrapli, Genie, batfish and Suzieq. Advanced Python training course details Who will benefit: Network engineers. Prerequisites: Python for network engineers Duration 5 days Advanced Python training course contents Review CLI, NETCONF, RESTCONF, structured versus unstructured data, gNMI and when to use which. PEP 8. Naming conventions. Packages, modules, Classes and methods. The scrapli library. Netmiko versus scrapli. Hands on: scrapli, Dictionaries versus Regular Expressions. Modules and Functions Writing your own modules, containers versus packages, virtual environments. Best practices, calling functions, writing your own functions. Parameters, arguments. Named arguments, dictionaries as arguments. Builtins. Docstrings. Main. __name__, __main__ . Program arguments. Hands on: Getting interfaces, showing interface status using Netmiko and functions. Using dictionaries as arguments. Writing your own modules. Parsing strategies Turning unstructured data into structured data. textfsm, PyATS Genie parser, NAPALM getters, Template Text Parser. Hands on: Genie parser, TTP. Accessing structured data with lists and dictionaries. Classes, objects and Python Python classes in Genie, PyEZ and others . Hands on: studying network automation classes, objects, methods and attributes. Configuration management - more nornir, ncclient, requests Nornir tasks. Nornir results, Nornir functions, Nornir plugins. Nornir processors. YANG, YANG models, pyang. NETCONF hello. Capabilities. Schemas. Filters. Subtrees. XPATH. Exploring available YANG data models. NETCONF and network wide transactions. Asserting NETCONF capabilities. Configuration types. Locking configurations, commits. NETCONF data stores. Netconf-console. RESTCONF differences from NETCONF. URI construction. Postman. More XML and JSON. Git and configuration versions. Hands on: Nornir and Jinja2. Exploring available models, NETCONF filters. Using postman. Python error handling and debugging Context handlers, try, assert, logging, pdb, pytest, unit testing, chatgpt. Hands on: Writing code with each of the error handling methods, investigating what happens on an error. Use chatgpt to debug your code. Python Automation Testing Testing and validation. pyATS, Genie. Testbed file. Genie parse, genie learn, genie diff. Genie conf, Genie ops, Genie SDK, Genie harness. Xpresso. Hands on: Using Genie for state comparisons of the network. Network analysis Batfish, pybatfish, configuration analysis, analysing routing, analysing ACLs. Pandas. Pandas dataframe. Filtering and selecting values of interest. Hands on: Use Batfish to analyse network snapshots, find network adjacencies, flow path analysis. Network observability Suzieq, using docker, using as a package. Sqpoller, suzieq-gui, suzieq-cli, sq-rest-server. Namespaces and seeing devices, network state and Asserts. Time based analysis, snapshots and changes. Hands on: Suzieq: Gathering data from the network, analysing data from the network. Network state assertion. Telemetry gRPC, gNMI. CAP, GET, SET. Subscriptions. Model Driven telemetry. Hands on: Analysing telemetry data with Python. Concurrency asyncio, threads, processes. Nornir concurrency. Scrapli and netmiko concurrency. Hands on: Multiple SSH connections to devices at same time. Scarpli asyncio.