The hasattr() method helps to check the given object has the specified attribute. If the attribute is present it returns true otherwise return false.
hasattr(object, name) #Where object,name shows object name and attribute name respectively.
Takes 3 parameters . The method hasattr() is called by getattr() to check to see if AttributeError is to be raised or not. The getattr() is used to get the value of a specified object’s attribute.
| Parameter | Description | Required / Optional |
|---|---|---|
| object | object whose named attribute is to be checked | Required |
| name | name of the attribute to be searched | Required |
The return value depends on getattr() function. If it has thrown AttributeError then False is returned. Otherwise, True is returned.
| Input | Return Value |
|---|---|
| the object has the given named attribute | True |
| the object has no given named attributer | False |
class Person:
age = 23
name = 'Adam'
pers
print('Person has age?:', hasattr(person, 'age'))
print('Person has salary?:', hasattr(person, 'salary'))
Output:
Person has age?: True Person has salary?: False
class Employee:
id = 0
name = ''
def __init__(self, i, n):
self.id = i
self.name = n
d = Employee(10, 'Pankaj')
if hasattr(d, 'name'):
print(getattr(d, 'name'))
Output:
Pankaj
class Employee:
age = 21
name = 'Phill'
employee = Employee()
print('Employee has age?:', hasattr(employee, 'age'))
print('Employee has salary?:', hasattr(employee, 'salary'))
Output:
Employee has age?: True Employee has salary?: False
