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eventpy | Event Dispatcher and callback list for Python | Pub Sub library

 by   wqking Python Version: Current License: Non-SPDX

 by   wqking Python Version: Current License: Non-SPDX

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kandi X-RAY | eventpy Summary

eventpy is a Python library typically used in Messaging, Pub Sub applications. eventpy has no bugs, it has no vulnerabilities, it has build file available and it has low support. However eventpy has a Non-SPDX License. You can install using 'pip install eventpy' or download it from GitHub, PyPI.
eventpy is a Python event library that provides tools that enable your application components to communicate with each other by dispatching events and listening for them. With eventpy you can easily implement signal/slot mechanism, or observer pattern. This library is the Python version rewritten from the C++ library eventpp, both are developed by the same developer.
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kandi-support Support

  • eventpy has a low active ecosystem.
  • It has 12 star(s) with 4 fork(s). There are 2 watchers for this library.
  • It had no major release in the last 12 months.
  • There are 0 open issues and 1 have been closed. On average issues are closed in 3 days. There are no pull requests.
  • It has a neutral sentiment in the developer community.
  • The latest version of eventpy is current.
eventpy Support
Best in #Pub Sub
Average in #Pub Sub
eventpy Support
Best in #Pub Sub
Average in #Pub Sub

quality kandi Quality

  • eventpy has 0 bugs and 0 code smells.
eventpy Quality
Best in #Pub Sub
Average in #Pub Sub
eventpy Quality
Best in #Pub Sub
Average in #Pub Sub

securitySecurity

  • eventpy has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
  • eventpy code analysis shows 0 unresolved vulnerabilities.
  • There are 0 security hotspots that need review.
eventpy Security
Best in #Pub Sub
Average in #Pub Sub
eventpy Security
Best in #Pub Sub
Average in #Pub Sub

license License

  • eventpy has a Non-SPDX License.
  • Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.
eventpy License
Best in #Pub Sub
Average in #Pub Sub
eventpy License
Best in #Pub Sub
Average in #Pub Sub

buildReuse

  • eventpy releases are not available. You will need to build from source code and install.
  • Deployable package is available in PyPI.
  • Build file is available. You can build the component from source.
  • Installation instructions, examples and code snippets are available.
  • It has 1718 lines of code, 236 functions and 24 files.
  • It has high code complexity. Code complexity directly impacts maintainability of the code.
eventpy Reuse
Best in #Pub Sub
Average in #Pub Sub
eventpy Reuse
Best in #Pub Sub
Average in #Pub Sub
Top functions reviewed by kandi - BETA

kandi has reviewed eventpy and discovered the below as its top functions. This is intended to give you an instant insight into eventpy implemented functionality, and help decide if they suit your requirements.

  • Dispatches an event
    • Returns the callable list for the given event
    • Dispatch an event
    • Get the event from args

Get all kandi verified functions for this library.

Get all kandi verified functions for this library.

eventpy Key Features

Powerful Supports synchronous event dispatching and asynchronous event queue. Configurable and extensible with policies.

Robust Supports nested event. During the process of handling an event, a listener can safely dispatch event and append/prepend/insert/remove other listeners. Thread safety. Supports multi-threading. Well tested. Backed by unit tests.

Flexible and easy to use Listeners and events can be of any type and do not need to be inherited from any base class. Requires Python 3. Tested with Python 3.7 and Cython.

Using CallbackList

copy iconCopydownload iconDownload
# create a CallbackList
callbackList = CallbackList()
callbackList.append(lambda s, b : print("Got callback 1, s is %s b is %d" % (s, b)))
def anotherCallback(s, b) :
	print("Got callback 2, s is %s b is %d" % (s, b))
callbackList.append(anotherCallback)
# Invoke the callback list
callbackList("Hello world", True)

Using EventDispatcher

copy iconCopydownload iconDownload
# create an EventDispatcher
dispatcher = EventDispatcher()

dispatcher.appendListener(3, lambda s, b : print("Got event 3, s is %s b is %d" % (s, b)))
dispatcher.appendListener(5, lambda s, b : print("Got event 5, s is %s b is %d" % (s, b)))
dispatcher.appendListener(5, lambda s, b : print("Got another event 5, s is %s b is %d" % (s, b)))

# Dispatch the events, the first argument is always the event type.
dispatcher.dispatch(3, "Hello", True)
dispatcher.dispatch(5, "World", False)

Using EventQueue

copy iconCopydownload iconDownload
# create an EventQueue
queue = eventqueue.EventQueue()
queue.appendListener(3, lambda s, n : print("Got event 3, s is %s n is %d" % (s, n)))
queue.appendListener(5, lambda s, n : print("Got event 5, s is %s n is %d" % (s, n)))
queue.appendListener(5, lambda s, n : print("Got another event 5, s is %s n is %d" % (s, n)))

# Enqueue the events, the first argument is always the event type.
# The listeners are not triggered during enqueue.
queue.enqueue(3, "Hello", 38)
queue.enqueue(5, "World", 58)

# Process the event queue, dispatch all queued events.
queue.process();

Community Discussions

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Trending Discussions on Pub Sub

QUESTION

Build JSON content in R according Google Cloud Pub Sub message format

Asked 2022-Apr-16 at 09:59

In R, I want to build json content according this Google Cloud Pub Sub message format: https://cloud.google.com/pubsub/docs/reference/rest/v1/PubsubMessage

It have to respect :

{
  "data": string,
  "attributes": {
    string: string,
    ...
  },
  "messageId": string,
  "publishTime": string,
  "orderingKey": string
}

The message built will be readed from this Python code:

def pubsub_read(data, context):
    '''This function is executed from a Cloud Pub/Sub'''
    message = base64.b64decode(data['data']).decode('utf-8')
    file_name = data['attributes']['file_name']

This following R code builds a R dataframe and converts it to json content:

library(jsonlite)
data="Hello World!"
df <- data.frame(data)
attributes <- data.frame(file_name=c('gfs_data_temp_FULL.csv'))
df$attributes <- attributes

msg <- df %>%
    toJSON(auto_unbox = TRUE, dataframe = 'columns', pretty = T) %>%
    # Pub/Sub expects a base64 encoded string
    googlePubsubR::msg_encode() %>%
    googlePubsubR::PubsubMessage()

It seems good but when I visualise it with a json editor :

enter image description here

indexes are added.

Additionally there is the message content: enter image description here

I dont'sure it respects Google Cloud Pub Sub message format...

ANSWER

Answered 2022-Apr-16 at 09:59

Not sure why, but replacing the dataframe by a list seems to work:

library(jsonlite)

df = list(data = "Hello World")
attributes <- list(file_name=c('toto.csv'))
df$attributes <- attributes

df %>%
  toJSON(auto_unbox = TRUE, simplifyVector=TRUE, dataframe = 'columns', pretty = T)

Output:

{
  "data": "Hello World",
  "attributes": {
    "file_name": "toto.csv"
  }
} 

Source https://stackoverflow.com/questions/71892778

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install eventpy

You can install using 'pip install eventpy' or download it from GitHub, PyPI.
You can use eventpy like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.

Support

OverviewTutorials of CallbackListTutorials of EventDispatcherTutorials of EventQueueClass CallbackListClass EventDispatcherClass EventQueuePolicies -- configure eventpyThere are runnable tutorials in the unit tests.

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