How to extract parameters from a list and pass them to a function call [duplicate]

This question already has answers here: Use of *args and **kwargs [duplicate] (11 answers) Closed 9 years ago.

What is a good, brief way to extract items from a list and pass them as parameters to a function call, such as in the开发者_运维问答 example below?

Example:

def add(a,b,c,d,e):
    print(a,b,c,d,e)

x=(1,2,3,4,5)

add(magic_function(x))

---

You can unpack a tuple or a list into positional arguments using a star.

def add(a, b, c):
    print(a, b, c)

x = (1, 2, 3)
add(*x)

Similarly, you can use double star to unpack a dict into keyword arguments.

x = { 'a': 3, 'b': 1, 'c': 2 }
add(**x) 

---

I think you mean the * unpacking operator:

>>> l = [1,2,3,4,5]
>>> def add(a,b,c,d,e):
...    print(a,b,c,d,e)
...
>>> add(*l)
1 2 3 4 5

---

Use the * operator. So add(*x) would do what you want.

See this other SO question for more information.