Python decorators' logic is still a bit fuzzy to me, bro. How do these things defined with the @ symbol add features to functions? They're used for stuff like logging, timing, but what's actually happening under the hood? Can you explain it simply?
How do decorators work in Python?
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Oh man, at first I was like "what the heck is this @ symbol?" I swear. Then I learned decorators are just wrappers for functions. I made a `@time_log` one that prints the time a function starts and finishes. Basically, they run another function that takes your function as a parameter, like adding an extra layer on top.
Decorators can be a bit confusing at first because they allow us to dynamically change the behavior of our functions. For example, if you want to measure how long a function takes to run, instead of manually adding and removing a timer, you can handle it directly with a decorator.
As for the code part, a decorator is essentially something that "wraps" another function around the beginning of a function. So:
```python
@timer
def my_function():
pass
```
This is just syntactic sugar. What's happening behind the scenes is that the `timer` function takes `my_function` as a parameter and returns a new function in its place. So when you call `my_function()`, you're actually running the timer version. I use a similar decorator for logging, which automatically records error messages. Once you write it, you can easily add it to all your functions.