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How to check for attributes in Python
Maria ElijahOverview
In Python, the hasattr() function checks if a given object has a specified attribute.
Syntax
hasattr(object, name)
Parameters
-
object: This represents the specified object that needs to be checked. -
attribute: This is the name of the attribute to be searched.
Return type
The hasattr() function returns True if a given object has the specified attribute. Otherwise, it returns False.
Code
The following code shows how to use the hasattr() function in Python:
# Create the Animal class
class Animal:
name = 'Dog'
color = 'brown'
breed = 'Dachsador'
# Create an instance of the Animal class
animal = Animal()
print('Does Animal has name?:', hasattr(animal, 'name'))
print('Does it has an age?:', hasattr(animal, 'age'))
print('Does it has a breed?:', hasattr(animal, 'breed')) Explanation
-
Lines 2–5: We create a class named
Animalwhich has the attributesname,color, andbreed. -
Line 7: We create an instance of the
Animalclass to access its attributes. -
Lines 9–11: We use the
hasattr()function to check if the given object has the specified attribute. Finally, we display the result.
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