Try this simple python decorator it s super useful
Автор: CodeGPT
Загружено: 2024-08-29
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certainly! python decorators are a powerful and useful feature that allows you to modify the behavior of a function or class. they are often used to add functionality to existing code in a clean and readable way.
what is a decorator?
a decorator is a function that takes another function as an argument and extends or alters its behavior without explicitly modifying it. decorators are often used for logging, enforcing access control, instrumentation, caching, and more.
creating a simple decorator
let's create a simple decorator that logs the execution time of a function. this can be useful for performance monitoring when you want to see how long a particular function takes to run.
#### step 1: define the decorator
here's how you can define a simple timing decorator:
#### step 2: use the decorator
now that we have our decorator, we can use it to decorate any function. here’s an example of a function that simulates a time-consuming task:
explanation of the code
1. **importing time module**: we import the `time` module to measure how long the function takes to execute.
2. **defining the decorator**:
the `timing_decorator` function takes another function `func` as an argument.
inside it, we define a `wrapper` function that will execute the original function.
we record the start time before calling the original function and the end time afterward.
we then calculate the execution time and print it.
finally, we return the result of the original function.
3. **using the decorator**:
we use the `@timing_decorator` syntax to decorate the `slow_function`.
when we call `slow_function`, it actually calls the `wrapper` function defined in the decorator, which measures the execution time.
output
when you run this code, you should see output similar to the following:
conclusion
decorators provide a powerful way to extend the behavior of functions in python. the example above shows how you can create a si ...
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