Event handling in python tutorials point

Event handling in python tutorials point


Event handlers is used for change device configuration,restart crashed service.  Event handlers are like as application which is also based on the results of service checks in Monitors. In this article we will see in detailed event handling in python tutorials point .

What is event handler in Python tutorials point?


Event handling class in python, which manage callbacks sender to be executed. It is used as attribute in events-aware class object in python but it does not kept as separate instance.

Event handling decides what should exactly happen if an any one event occur.This process have the code which is called as event handler. you know that Listener python is responsible for generating response to the event during this mechanism hence it is also known as event handler.

Most important function in event handling :

Event handling in python tutorials point
Event handling in python tutorials point
  1. callbacks
  2. sender
  3. add(callback : Callable)
  4. remove(callback : Callable)
  5. __call__(*args) → [ ... ]
For example :

>>> def myfunct(sender):
...     print("Show the event triggered by sender)
>>> class MyClass(object):
...     def __init__(self):
...         Handlerns = EventHandler(self)
...
>>> myobj = MyClass()
>>> myobj.anevent += myfunct
>>> myobj.anevent()
event triggered by the <__main__.MyClass object at 0x805457e50>
#1 callbacks
A callbacks function is currently bound to the EventHandlers.

#2 sender
The function is responsible object that executes the EventHandlers.

#3 add(callback : Callable)
add function adds a callback to the EventHandlers.

#4 remove(callback : Callable)
Remove function removes a callback from the EventHandlers.

#5 call__(*args) → [ ]
Executes all connect callback in the order of passing the sender of the EventHandler 

Some FAQ about Event handling in python tutorials point:

What are the action event handling methods?

This action() method is very important event-handling methods in python. 
Following control components used inaction events -- 
  • Button, 
  • Checkbox,
  •  Choice,
  •  List, 
  • MenuItem, 
  • TextField objects
What is event handling explain with example?
Event handling describes the always change in state of the object.every program that uses GUI such as python application,java application written for window, is also event driven.
For Example : Pressing  bell button, put a set character in Textbox, etc.

summary:
In this post we saw in detailed what is exactly Event handling in python tutorials point. I hope you enjoy this section.
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Event handling in python tutorials point,What is event handler in Python?,What are the action event handling methods?,What is event handling explain with example?
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