🐍 Python 3.13 Will Let You Deprecate Functions
Updating your stack will get easier with Python 3.13
According to the PEP list, Python 3.13 will come likely with a new feature proposed by Jelle Zijlstra.
As he noticed, there’s no way in standard Python to mark deprecated functions and other elements.
In this release we will likely see a native solution to the problem handled currently with third party packages.
An unorthodox use of type check will make it possible to recognize deprecated functions by IDEs and rise appropriate warnings or errors.
Thanks to that it will be easier to keep users up to date with changes in library APIs.
The syntax is straight forward:
from warnings import deprecated
@deprecated("Use Spam instead")
class Ham: ...
@deprecated("It is pining for the fiords")
def norwegian_blue(x: int) -> int: ...
@overload
@deprecated("Only str will be allowed")
def foo(x: int) -> str: ...
@overload
def foo(x: str) -> str: ...
As you can see all you’ll need to do is to use deprecated decorator and provide a message. It should include information for a replacement to make it easier to update the code.
The decorator can also receive category and stackLevel to control reaction to the usage of the element, and dependency level to trigger the action.
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