Callable () function in Python

Continuing with the topic of Python built-in functions, the article will introduce you to the callable function () with syntax, usage as well as specific examples. Invites you to read the track.

callable () in Python checks whether objects can be called. If the object is allowed to call, the function returns TRUE, otherwise it returns FALSE.

Callable () function syntax in Python

 callable (object) 

Callable function parameters ():

The callable () function has only one argument, object.

What value does the callable () function return?

1. TRUE: The object can be called.
2. FALSE: The object cannot be called.

However, you should note that, even if callable () returns TRUE , there is a case of calling the failed object.

But if the result returned is FALSE , it will definitely not be able to call the object.

How does example 1: callable () work?

 x = 5 
 print (callable (x)) 

 def ktraHam (): 
 print ("Ktra") 

 y = kdHam 
 print (callable (y)) 

When you run the program, the output output will be:

 False 
 True 

In this example, object x cannot be called, and object y can be called.

Example 2: The object can be called

 class Quantrimang: 
 def __call __ (self): 
 print ('Print screen image') 

 print (callable (Quantrimang)) 

When you run the program, the output output will be:

 True 

So the class object here can be called.

You can continue to perform other necessary commands.

 class Quantrimang: 
 def __call __ (self): 
 print ('Print to screen') 

 InstanceOfQuantrimang = Quantrimang () 

 # Prints 'Print to screen' 
 InstanceOfQuantrimang () 

Example 3: The object appears but cannot be called.

 class Quantrimang: 
 def printLine (self): 
 print ('Print to screen') 

 print (callable (Quantrimang)) 

When you run the program, the output output will be:

 True 

The object in class Quantrimang here returns a call, but when executing another command an error occurs, for example:

 class Quantrimang: 
 def printLine (self): 
 print ('Print to screen') 

 print (callable (Quantrimang)) 

 InstanceOfQuantrimang = Quantrimang () 
 # Error occurred 
 # 'Quantrimang' cannot be called 
 InstanceOfQuantrimang () 

Program reported an error:

 True 

 Traceback (most recent call last): 
 File "", line 10, print 
 InstanceOfQuantrimang () 
 TypeError: 'Quantrimang' object is not callable 

Callable () has only a few notes like that. Remember to practice regularly with Python exercises.

See more:

1. Bool () function in Python
2. Ascii () function in Python
3. Bin () function in Python

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