python, @validate_arguments
时间: 2024-04-29 22:21:14 浏览: 12
Python's `@validate_arguments` decorator is a function argument validation decorator that can be used to validate the types and values of the arguments passed to a function. It is part of the `decorator` library, which can be installed using `pip`.
Here's an example of how to use the `@validate_arguments` decorator:
```
from decorator import validate_arguments
@validate_arguments
def add_numbers(a: int, b: int) -> int:
return a + b
```
In this example, the `add_numbers` function takes two arguments, `a` and `b`, both of which are expected to be integers. The `@validate_arguments` decorator ensures that the arguments passed to the function are of the expected types, and raises a `TypeError` if not.
For example, if we call `add_numbers` with a string argument, we'll get a `TypeError`:
```
add_numbers('1', 2)
# TypeError: Invalid argument type <class 'str'> for parameter 'a'
```
Using `@validate_arguments` can help prevent bugs caused by passing the wrong types of arguments to a function, and can make debugging easier by providing clear error messages.