object Example
The object() function creates a new empty object, which serves as the base for all Python classes. It’s useful for creating generic objects, inheritance, and custom class structures.
Example
obj = object()
print(obj)
# Output: This creates a new generic object.
Syntax
object()- Returns → A new base object with no attributes or methods.
1. Using object() as a Placeholder
You can use object() as a dummy value when you need a unique placeholder.
NOT_SET = object()
def check_value(value):
if value is NOT_SET:
print("Value is not set")
else:
print("Value is:", value)
check_value(NOT_SET) # Output: Value is not setUnlike None, a new object() is always unique.
2. Creating a Custom Class from object
In Python 3, all classes inherit from object by default, but you can still define it explicitly.
class MyClass(object):
pass
obj = MyClass()
print(isinstance(obj, object))
# Output: TrueEvery Python class is automatically a subclass of object.
3. Understanding object() Methods
Since object is the base class, it inherits basic methods like:
obj = object()
print(dir(obj))Returns methods like:
['__class__', '__delattr__', '__dir__', '__eq__', '__format__', '__hash__', ...]These are default object methods.
4. Preventing Attribute Modification
An object() instance cannot have attributes assigned.
obj = object()
obj.name = "Test"
# AttributeError: 'object' object has no attribute 'name'This makes object() immutable.
Key Notes
- ✔ Base class for all Python objects.
- ✔ Can be used as a unique placeholder.
- ✔ Does not support attribute assignment.
- ✔ All Python classes inherit from
objectby default.
By using object(), you can create generic objects, structure class hierarchies, and ensure uniqueness in special cases. 🚀