python - multiply and add each element in list a with list b

Question

function:

def unique_common(a, b):

I have two lists, lets say:

a = [2, 3, 5, 7, 9] 

and another list

b = [5, 8         


        

Answer 1

Perhaps the solution would be to use NumPy, where the code should be very self-explanatory :

import numpy as np

a = np.array([2,3,5,7,9])
b = np.array([5,8,4,1,11])

c = a*b
d = np.sum(c)
print(d)

Answer 2

With sum and zip:

>>> a = [2, 3, 5, 7, 9]
>>> b = [5, 8, 4, 1, 11]
>>> sum(count*price for count, price in zip(a,b))
160

could you please tell how to give a lists a and b as parameters to a function like def unique_common(a, b)

>>> def total_price(a, b):
...     return sum(count*price for count, price in zip(a,b))
... 
>>> a = [2, 3, 5, 7, 9]
>>> b = [5, 8, 4, 1, 11]
>>> total_price(a, b)
160

Answer 3

And also you can use map :

>>> a = [2, 3, 5, 7, 9] 
>>> b = [5, 8, 4, 1, 11]
>>> sum(map(lambda x: x[0] * x[1], zip(a, b)))
160