CODEWITHSUNDEEP
pythonlist
user2608268
user2608268

Reputation: 3

multiply list elements in python

How do I multiply every element of one list with every element of another list in Python and then sum the result of the multiplying results variations?

list_1 = [0, 1, 2, 3, 4, 5]

list_2 = [11, 23, m]

Where m element in the list_2 can be any number while the length of the elements in the list is entered with the input. So basically that list contains minimum of 2 elements and can go to up to 12 based on the user requirements.

What I am looking for is a function/algorithm which will allow the following list of the results.:

0*11 + 0*23 +..+ 0*m

1*11 + 0*23 +..+ 0*m

2*11 + 0*23 +..+ 0*m

..

3*11 + 2*23 + .. + 5*m

..

5*11 + 5*23 +..+ 5*m

Upvotes: 0

Views: 663

Answers (3)

user2357112
user2357112

Reputation: 282026

itertools.product can help you generate all ways to select elements of list1 to multiply by elements of list2.

sums = []
for list1_choices in itertools.product(list1, repeat=len(list2)):
    sums.append(sum(x*y for x, y in zip(list1_choices, list2))

Or, as a list comprehension:

[sum(x*y for x, y in zip(list1_choices, list2))
 for list1_choices in itertools.product(list1, repeat=len(list2))]

Upvotes: 2

richsilv
richsilv

Reputation: 8013

[sum(x * y for x in list_2) for y in list_1]

Upvotes: 4

jh314
jh314

Reputation: 27812

You can use a for loop:

for x in list_1:
    print sum(x * y for y in list_2)

Upvotes: 0

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