How Can I Dynamically Add Properties to Classes in Python?

Dynamically Adding Properties to Classes

In programming, it can be necessary to add properties to classes dynamically. This can be done to create mock objects that mimic the behavior of real objects, such as database result sets.

One might initially try to accomplish this by setting attributes and then using property() to create properties at runtime. However, this will result in returning a property object instead.

The correct way to add an instance property at runtime is to add it to the class itself. This can be achieved by using the following syntax:

Foo.property_name = property(lambda self: self.attribute_name)

In this example, Foo is the class to which the property is being added, property_name is the name of the property, and attribute_name is the name of the attribute that will be accessed by the property.

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