(Fix it) Extend list with multiple other ones

[andreimotin]

We need to be able to automatically extend our list with multiple other ones, here's an example:
How it works now:

sales_w1 = [7,3,42,19,15,35,9]
sales_w2 = [12,4,26,10,7,28]
sales = []
sales.extend(sales_w1)
sales.extend(sales_w2)

But could've been this:

sales_w1 = [7,3,42,19,15,35,9]
sales_w2 = [12,4,26,10,7,28]
sales = []
sales.extend(sales_w1, sales_w2)

How do I suggest the Python devs and contributors to get this function on board?
Thanks in advance!

[Gribouillis]

You can do

from itertools import chain

sales.extend(chain(sales_w1, sales_w2))

[perfringo]

Alternatively just unpack:

sales = [*sales_w1, *sales_w2]

[Pedroski55]

Wouldn't it be better to keep the weeks apart, so you can directly refer to any given week?

sales = {}
for i in range(1, 53):  
    # assume the poor staff must work 7 days a week, 52 weeks a year!  
    sales[f'sales_w{str(i)}'] = [randint(1, 50) for i in range(7)]  

How did we do in sales week 25?

print(sales['sales_w25'])

Output:
[39, 10, 7, 47, 17, 38, 12]

But if you really want all the sales together:

total_sales = []
for value in sales.values():
    total_sales = total_sales + value