Python Event Driven Serial Number
Import serial import select timeout = 10 conn = serial.Serial(serialname, baudrate, timeout=0) read, = select.select(conn, , , timeout) readdata = conn.read(0x100) Below is a full example that creates a pseudo-tty in the main thread. The main thread writes data to the pty in 5 second intervals. The Python programming language. Contribute to python/cpython development by creating an account on GitHub. Serial - serial number of event: num - mouse button pressed (ButtonPress, ButtonRelease) focus - whether the window has the focus (Enter, Leave).
-->Definition
Examples
The following code example demonstrates the use of the SerialPort class to allow two users to chat from two separate computers connected by a null modem cable. In this example, the users are prompted for the port settings and a username before chatting. Both computers must be executing the program to achieve full functionality of this example.
Remarks
Use this class to control a serial port file resource. This class provides synchronous and event-driven I/O, access to pin and break states, and access to serial driver properties. Additionally, the functionality of this class can be wrapped in an internal Stream object, accessible through the BaseStream property, and passed to classes that wrap or use streams.
The SerialPort class supports the following encodings: ASCIIEncoding, UTF8Encoding, UnicodeEncoding, UTF32Encoding, and any encoding defined in mscorlib.dll where the code page is less than 50000 or the code page is 54936. You can use alternate encodings, but you must use the ReadByte or Write method and perform the encoding yourself.
You use the GetPortNames method to retrieve the valid ports for the current computer.
If a SerialPort object becomes blocked during a read operation, do not abort the thread. Instead, either close the base stream or dispose of the SerialPort object.
Constructors
| SerialPort() | Initializes a new instance of the SerialPort class. |
| SerialPort(IContainer) | Initializes a new instance of the SerialPort class using the specified IContainer object. |
| SerialPort(String) | Initializes a new instance of the SerialPort class using the specified port name. |
| SerialPort(String, Int32) | Initializes a new instance of the SerialPort class using the specified port name and baud rate. |
| SerialPort(String, Int32, Parity) | Initializes a new instance of the SerialPort class using the specified port name, baud rate, and parity bit. |
| SerialPort(String, Int32, Parity, Int32) | Initializes a new instance of the SerialPort class using the specified port name, baud rate, parity bit, and data bits. |
| SerialPort(String, Int32, Parity, Int32, StopBits) | Initializes a new instance of the SerialPort class using the specified port name, baud rate, parity bit, data bits, and stop bit. |
Fields
| InfiniteTimeout | Indicates that no time-out should occur. |
Properties
| BaseStream | Gets the underlying Stream object for a SerialPort object. |
| BaudRate | Gets or sets the serial baud rate. |
| BreakState | Gets or sets the break signal state. |
| BytesToRead | Gets the number of bytes of data in the receive buffer. |
| BytesToWrite | Gets the number of bytes of data in the send buffer. |
| CanRaiseEvents | Gets a value indicating whether the component can raise an event. (Inherited from Component) |
| CDHolding | Gets the state of the Carrier Detect line for the port. |
| Container | Gets the IContainer that contains the Component. (Inherited from Component) |
| CtsHolding | Gets the state of the Clear-to-Send line. |
| DataBits | Gets or sets the standard length of data bits per byte. |
| DesignMode | Gets a value that indicates whether the Component is currently in design mode. (Inherited from Component) |
| DiscardNull | Gets or sets a value indicating whether null bytes are ignored when transmitted between the port and the receive buffer. |
| DsrHolding | Gets the state of the Data Set Ready (DSR) signal. |
| DtrEnable | Gets or sets a value that enables the Data Terminal Ready (DTR) signal during serial communication. |
| Encoding | Gets or sets the byte encoding for pre- and post-transmission conversion of text. |
| Events | Gets the list of event handlers that are attached to this Component. (Inherited from Component) |
| Handshake | Gets or sets the handshaking protocol for serial port transmission of data using a value from Handshake. |
| IsOpen | Gets a value indicating the open or closed status of the SerialPort object. |
| NewLine | Gets or sets the value used to interpret the end of a call to the ReadLine() and WriteLine(String) methods. |
| Parity | Gets or sets the parity-checking protocol. |
| ParityReplace | Gets or sets the byte that replaces invalid bytes in a data stream when a parity error occurs. |
| PortName | Gets or sets the port for communications, including but not limited to all available COM ports. |
| ReadBufferSize | Gets or sets the size of the SerialPort input buffer. |
| ReadTimeout | Gets or sets the number of milliseconds before a time-out occurs when a read operation does not finish. |
| ReceivedBytesThreshold | Gets or sets the number of bytes in the internal input buffer before a DataReceived event occurs. |
| RtsEnable | Gets or sets a value indicating whether the Request to Send (RTS) signal is enabled during serial communication. |
| Site | Gets or sets the ISite of the Component. (Inherited from Component) |
| StopBits | Gets or sets the standard number of stopbits per byte. |
| WriteBufferSize | Gets or sets the size of the serial port output buffer. |
| WriteTimeout | Gets or sets the number of milliseconds before a time-out occurs when a write operation does not finish. |
Methods
| Close() | Closes the port connection, sets the IsOpen property to |
| CreateObjRef(Type) | Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object. (Inherited from MarshalByRefObject) |
| DiscardInBuffer() | Discards data from the serial driver's receive buffer. |
| DiscardOutBuffer() | Discards data from the serial driver's transmit buffer. |
| Dispose() | Releases all resources used by the Component. (Inherited from Component) |
| Dispose(Boolean) | Releases the unmanaged resources used by the SerialPort and optionally releases the managed resources. |
| Equals(Object) | Determines whether the specified object is equal to the current object. (Inherited from Object) |
| GetHashCode() | Serves as the default hash function. (Inherited from Object) |
| GetLifetimeService() | Retrieves the current lifetime service object that controls the lifetime policy for this instance. (Inherited from MarshalByRefObject) |
| GetPortNames() | Gets an array of serial port names for the current computer. |
| GetService(Type) | Returns an object that represents a service provided by the Component or by its Container. (Inherited from Component) |
| GetType() | Gets the Type of the current instance. (Inherited from Object) |
| InitializeLifetimeService() | Obtains a lifetime service object to control the lifetime policy for this instance. (Inherited from MarshalByRefObject) |
| MemberwiseClone() | Creates a shallow copy of the current Object. (Inherited from Object) |
| MemberwiseClone(Boolean) | Creates a shallow copy of the current MarshalByRefObject object. (Inherited from MarshalByRefObject) |
| Open() | Opens a new serial port connection. |
| Read(Byte[], Int32, Int32) | Reads a number of bytes from the SerialPort input buffer and writes those bytes into a byte array at the specified offset. |
| Read(Char[], Int32, Int32) | Reads a number of characters from the SerialPort input buffer and writes them into an array of characters at a given offset. |
| ReadByte() | Synchronously reads one byte from the SerialPort input buffer. |
| ReadChar() | Synchronously reads one character from the SerialPort input buffer. |
| ReadExisting() | Reads all immediately available bytes, based on the encoding, in both the stream and the input buffer of the SerialPort object. |
| ReadLine() | Reads up to the NewLine value in the input buffer. |
| ReadTo(String) | Reads a string up to the specified
|
| ToString() | Returns a String containing the name of the Component, if any. This method should not be overridden. (Inherited from Component) |
| Write(Byte[], Int32, Int32) | Writes a specified number of bytes to the serial port using data from a buffer. |
| Write(Char[], Int32, Int32) | Writes a specified number of characters to the serial port using data from a buffer. |
| Write(String) | Writes the specified string to the serial port. |
| WriteLine(String) | Writes the specified string and the NewLine value to the output buffer. |
Events
| DataReceived | Indicates that data has been received through a port represented by the SerialPort object. |
| Disposed | Occurs when the component is disposed by a call to the Dispose() method. (Inherited from Component) |
| ErrorReceived | Indicates that an error has occurred with a port represented by a SerialPort object. |
| PinChanged | Indicates that a non-data signal event has occurred on the port represented by the SerialPort object. |
Applies to
This is an attempt to collect all info about Domain Driven Design the World knows in dynamic languages (Python, Ruby, PHP etc). Not only DDD but all worthy info about layered and clean architecture with separation of business logic from infrastructure and framework code.
So let's go!
Books
Architecture Patterns with Python (aka 'Cosmic Python') - Book by Harry Percival and Bob Gregory featuring DDD and strategic patterns (forthcoming on O'Reilly, also available in early release on safari
Clean Architectures in Python - Book by Leonardo Giordani based on his post
Domain-Driven Rails - a book by Robert Pankowecki & Arkency Team about DDD, CQRS, Event Sourcing related to Rails projects
Domain-Driven Design in PHP - Book by Carlos Buenosvinos, Christian Soronellas, and Keyvan Akbary about DDD and implement with PHP
Event Sourced Building Blocks for Domain Driven Design with Python - This small book contains a concise pattern language for event sourced DDD in Python. This book focuses on reliable 'building blocks' for DDD. It avoids reprising the 'strategic' patterns of DDD. It takes a practical 'bottom up' approach to making reliable, scalable, maintainable applications and systems. The preface includes a rejuventated consideration of pattern language as description of events. This is a small book, and isn't quite finished at this time.
Implementing the Clean Architecture - a book focusing on practical aspects of implementing the Clean Architecture. It is heavily illustrated by code snippets in Python. Apart from the Clean Architecture itself, it also introduces other software engineering patterns, like modularity, Dependency Injection. CQRS or Event Sourcing.
Stack exchange resources
Separation of business logic and data access in django - Python, Django
DDD - Domain Driven Design, which development order should be applied? - Python
Retrieving aggregates from inside of other aggregates - StackOverflow question about aggregates in Python application
Slides found in slideshare or anywhere else
Clean Architecture Python (web) apps - Przemek Lewandowski about application of Uncle Bob's Clean Architecture to Python web apps with code examples and type annotations
Domain Driven Design com Python - slides in Portuguese, but contains some useful code in Python
From Active Record to Events - Emanuele DelBono about using DDD/CQRS/ES in ruby on rails applications
Hexagonal design in Django - Python, Django, contains some code.
Articles, blogs etc
DDD for Rails developers - whole blog by Victor Savkin about DDD in Ruby on Rails
Domain-Driven Design and MVC Architectures - two articles from Federico Cargnelutti with PHP examples in second part
Value Objects in Java & Python - about Value Object, comparison of value objects in Java and Python
Domain Driven Design methodic Python - A little summary about DDD in Python
Exploring domains with python - A little article with example of Repository and Storage classes
Clean architectures in Python: a step-by-step example - Implementation of Uncle Bob's Clean Architecture in Python. Contains step by step explanation and github repo with all code.
DDD with Ports and Adapters in Python from the made.com tech blog, followed by Repository and Unit of Work Pattern in Python, CQRS / Handlers and Views and Why use Domain Events?
Large web apps in Python: A good architecture - Article with a point that MVC is not enough for large applications and you need separate layer for business logic.
DDD + Ruby subreddit - A subreddit for Ruby developers interested in Domain-Driven Design.
Arkency blog and newsletter - They write about DDD, Event Sourcing and testing in Ruby/Rails a lot. Not just plain text, but code and even webinars occasionally.
Hanami em Production – 2 anos depois: post in Portuguese describing the experience of Creditas at building and maintaining its core app (60k lines of code + 2m request/month) with DDD in Ruby using Hanami framework.
How to Improve on Naming Contexts in Domain-Driven Design - Describes technique of how to find a better name for your bounded contexts.
Implementing Domain-Driven Design in PHP - Introduce Domain Driven Design and how to Implementing in Laravel with PHP by Alireza Rahmani Khalili.
Event Sorcery - Detailed blog with lengthy articles about building event sourced domain driven applications with Python.
Talks, videos, Podcasts
Domain-Driven Design with Python - Great talk about DDD and Python with explanations of many DDD topics and code examples by Robert Smallshire from Skills Matter
Domain-Driven Design Patterns in Python - Detailed talk about DDD patterns in Python by Robert Smallshire from EuroPython 2018
The Clean Architecture in Python - Awesome talk on PyOhio2014 from Brandon Rhodes
Hexagonal architecture in Django Talk in Russian by @proofit404, contains code examples and project layout
Domain Driven Design and Hexagonal Architecture with Rails - Ruby on Rails talk from RailsConf 2014 by Eric Roberts and Declan Whelan with code examples
Hexagonal Rails - Ruby on Rails, GoRuCo 2012 by Matt Wynne
Hexagonal Architecture in DDD - Golf with DDD in PHP by Gordon Skinner from PHP UK Conference
Boundaries Python - Talk about Boundaries by Gary Bernhardt from Pycon US 2013
Boundaries Ruby - Same talk by Gary Bernhardt but in Ruby from Ruby Conf 12. Contains QA section.
Hexagonal TDD - TDD implementation of hexagonal architecture of rails application. In 3 parts.
Jim Weirich on Decoupling from Rails - Showcase from Jim Weirich from October CincyRb.
From Active Record to Events - A talk by Emanuele DelBono from Wroclove.rb about DDD/CQRS/ES in Ruby and Ruby on Rails.
Built to last: A domain-driven approach to beautiful systems - RailsConf 2017 talk by Andrew Hao. Techniques for refactoring legacy codebase to DDD style, design overview and code examples.
Technically DDD - Fantastic talk by Pim Elshoff on getting started with DDD using Value Objects, Entities and Services in PHP
Perhap: Applying Domain Driven Design and Reactive Architectures to Functional Programming - a talk by Rob Martin from ElixirConf 2017.
Clean Architecture - PyGotham 2018 talk by Sebastian Buczyński with code and slides. There is also a blog post in English
Domain Driven Design - CODEiD 2018 talk by Артём Антоненко @Antonyan. In Russian. There's also a repo - PHP DDD Skeleton, and other DDD-related projects under his github account.
One reason for the above screen capture is that the system will go into LiveCD mode if one does not select installation within 60 seconds. There are a few simple click-through screens which are very obvious so we will skip some of them in the interest of download speeds. Hyper-v manager. Android-x86 on Hyper-V Create and Modify PartitionsThat brings up perhaps the most non-intuitive part of the installation, cfdisk. Android-x86 on Hyper-V Boot ScreenOf course to install Android we need a drive to install it on. For this, we will go to Create/Modify partitions.
Eventsourcing 101 - the talk about event sourcing with live coding in Python by Bob Gregory. He codes an event sourced e-commerce basket from scratch.
Domain Driven Design For Python - Episode 219 - When your software projects start to scale it becomes a greater challenge to understand and maintain all of the pieces. In this episode Henry Percival shares his experiences working with domain driven design in large Python projects.
Как мы уменьшили сложность наших проектов - PyCon RU 2019 talk by Борис Цема (in Russian) about using DDD patterns to reduce Wargaming.net projects.
Clean Architectures in Python - PyLondinium19 talk by Leonardo Giordani
Code, code, code!
Event Sourcing in Python - Mature, stable, popular Python library for event sourcing and DDD.
real-world-domain-model - Starts by building a domain model of a UK company using pure Python then adapts a TDD approach to add more detail, resulting in an accurate and complex domain layer that forms the basis for other tutorials on eventsorcery.com about the Event Sourcing in Python library.
python-eventsourcing-tutorial - Demonstrates how to use the Event Sourcing in Python library step-by-step.
dry-python - A set of Python libraries for pluggable business logic components.
Ruby DDD Sample App - Port of DDD Sample Application written in Java in Ruby. Definitely worth reading.
DDD in Django - An attempt to implement DDD and hexagonal architecture in Django
DDD in Flask - A terse example of DDD-inspired architecture using Flask
Kanban in Python - Python implementation of simple kanban board with DDD approach.
Kanban in Clojure - Same in Clojure
Kanban in Python exercises - Same board devided on exercises for students of some workshop by Sixty-North.
Rewind - Rewind is a (CQRS) event store server written in Python. Not that it written with DDD approach but still related.
The Clean Architecture example application (python) - Repository with example modular application written in Python. The code is used in Implementing the Clean Architeure book.
The Clean Architecture with Python - Reddit discussion about the topic and this gist with proposed architecture and some comments on it.
abidria-api - Django application written with clean architecture. There also an article by Jordi Fierro which explains architecture components and how they interact with each other.
Hanami - A good option out of the Rails world, Hanami is an emerging framework that encourages and helps to design DDD applications in Ruby. The getting started guide references some DDD concepts and how they fit inside the framework.
Revents - A possibile implementation of a DDD/CQRS/ES in Ruby and Ruby on Rails
DDD Rails Sample - project meant to be used as a start point for those who want to build Domain Driven Design applications in Rails.
Domain Driven Design Classes and Interfaces - The project is a PHP sample collection of Domain Driven Design inspired Classes and Interfaces.
Paid training and workshops
DDD Patterns in Python - Sixty North offers two-day classroom training on implementing DDD in Python with relational or event-sourced persistence.
Rails + Domain Driven Design Workshop - workshops by Arkency. The page should have a schedule for future workshops and a summary of what to expect from them.