*args && **kwargs

• *args 并不是往里传个列表。直接传就好。

# sum_integers_args.py
def my_sum(*args):
    result = 0
    # Iterating over the Python args tuple
    for x in args:
        result += x
    return result

print(my_sum(1, 2, 3))

不要写成：s = [1,2,3]; my_sum(s)

• Bear in mind that the iterable object you’ll get using the unpacking operator * is not a list but a tuple. A tuple is similar to a list in that they both support slicing and iteration. However, tuples are very different in at least one aspect: lists are mutable, while tuples are not.

To recap, the correct order for your parameters is:

Standard arguments
*args arguments
**kwargs arguments

Unpacking With the Asterisk Operators: * & **

my_list = [1, 2, 3]
print(*my_list)
1 2 3
"""
Here, the * operator tells print() to unpack the list first.
In this case, the output is no longer the list itself, but rather the content of the list:
"""

# merging_lists.py
my_first_list = [1, 2, 3]
my_second_list = [4, 5, 6]
my_merged_list = [*my_first_list, *my_second_list]

print(my_merged_list)