Explanation of AttributeError: ‘_unknown’ object has no attribute ‘id’
This error occurs when you try to access an attribute or method on an object that does not exist. In this specific case, the object in question is of type ‘_unknown’, and it does not have an attribute called ‘id’.
To understand this error better, let’s see an example. Consider the following code snippet:
class Person:
def __init__(self, name):
self.name = name
person = Person("John")
print(person.id)
In the code above, we define a class called ‘Person’ with an ‘id’ attribute. However, when creating an instance of the ‘Person’ class and trying to access its ‘id’ attribute, we will encounter the AttributeError. This is because the ‘id’ attribute is not defined in the ‘Person’ class.
To fix this error, you can either add an ‘id’ attribute to the ‘Person’ class or make sure you access the correct attribute that actually exists. Here’s an updated version of the code snippet to demonstrate these solutions:
class Person:
def __init__(self, name, id):
self.name = name
self.id = id
person = Person("John", 1)
print(person.id) # Outputs 1
In the modified code, we added an ‘id’ parameter to the constructor of the ‘Person’ class and assigned it to the ‘id’ attribute. Now, when accessing the ‘id’ attribute of the ‘person’ instance, it will correctly output the assigned value of 1 without raising an AttributeError.