Python中的Args和Kwargs是什麼

args 用於接收任意數量的位置參數並將其收集為元組，*kwargs 用於接收任意數量的關鍵字參數並將其收集為字典，二者結合可提升函數靈活性，適用於需處理不定參數的場景。

In Python, args and kwargs are used to pass a variable number of arguments to a function. They make your functions more flexible by allowing them to accept extra inputs without defining each one explicitly.

What are *args?

The *args syntax allows a function to accept any number of positional arguments. The asterisk ( * ) before args tells Python to collect all additional positional arguments into a tuple.

For example:

This will print a greeting for each name. The function doesn't need to know how many names it will receive ahead of time.

What are **kwargs?

The **kwargs syntax lets a function take any number of keyword arguments. The double asterisk ( ** ) collects extra keyword arguments into a dictionary.

Example:

This prints each key-value pair passed as keyword arguments.

Using both args and kwargs

You can use both in the same function. The order matters: standard arguments come first, then *args , then **kwargs .

Here, name is required, hobbies become a tuple, and details become a dictionary.

Basically, *args handles extra positional inputs and **kwargs manages extra named inputs. They're useful when writing reusable or wrapper functions. The names args and kwargs are conventions — you could use others like *params or **options , but these two are widely recognized.

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