How to make function decorators and chain them together?
How can I make two decorators in Python that would do the following?
decorator
How does the @property decorator work in Python?
I would like to understand how the built-in function property works. What confuses me is that property can also be used as a decorator, but it only takes arguments when used as a built-in function and not when used as a decorator.
Decorators with parameters?
I have a problem with the transfer of the variable insurance_mode by the decorator. I would do it by the following decorator statement:
What does functools.wraps do?
In a comment on this answer to another question, someone said that they weren’t sure what functools.wraps was doing. So, I’m asking this question so that there will be a record of it on StackOverflow for future reference: what does functools.wraps do, exactly?
How to get method parameter names?
Given the Python function:
Is there a decorator to simply cache function return values?
Consider the following:
Preserving signatures of decorated functions
Suppose I have written a decorator that does something very generic. For example, it might convert all arguments to a specific type, perform logging, implement memoization, etc.
Calling class staticmethod within the class body?
When I attempt to use a static method from within the body of the class, and define the static method using the built-in staticmethod function as a decorator, like this:
Python memoising/deferred lookup property decorator
Recently I’ve gone through an existing code base containing many classes where instance attributes reflect values stored in a database. I’ve refactored a lot of these attributes to have their database lookups be deferred, ie. not be initialised in the constructor but only upon first read. These attributes do not change over the lifetime of the instance, but they’re a real bottleneck to calculate that first time and only really accessed for special cases. Hence they can also be cached after they’ve been retrieved from the database (this therefore fits the definition of memoisation where the input is simply “no input”).
How to decorate a class?
How do I create a decorator that applies to classes?