Cannot import name ‘cached_property’ from ‘functools’

The error message “cannot import name ‘cached_property’ from ‘functools'” typically occurs when the Python script is trying to import the ‘cached_property’ attribute from the ‘functools’ module, but it is not available or not defined in the version of Python being used.

To resolve this issue, you need to check if the ‘cached_property’ attribute is available in your Python version. The ‘cached_property’ attribute was introduced in Python 3.8 and is not available in earlier versions. So, if you are using an older version of Python, you will encounter this error.

If you are using Python 3.8 or later, then the ‘cached_property’ attribute should be available in the ‘functools’ module. However, make sure you are importing it correctly. It should be imported as:

from functools import cached_property

Here’s an example to illustrate its usage:

from functools import cached_property

class MyClass:
    @cached_property
    def my_property(self):
        print("Calculating my_property...")
        return 42

my_object = MyClass()
print(my_object.my_property)  # Output: Calculating my_property... \n 42
print(my_object.my_property)  # Output: 42 (No calculation because the value is cached)

In the above example, the ‘my_property’ attribute of the ‘MyClass’ class is decorated with the ‘cached_property’ attribute. This attribute, when accessed for the first time, calculates the value and caches it. Further accesses to the attribute retrieve the cached value without recalculating it.

If you have checked your Python version and the code import, but still encounter the same error, make sure that the Python installation you are using is not corrupted. Try reinstalling Python or using a different Python environment to see if the issue persists.