Question

How to calculate dot product of two lists in Python

Answer 1

def calculate_dot_product(lst1,  lst2) :
    product = 0
    size = len(lst1)
    i = 0
    while (i < size) :
        product += lst1[i] * lst2[i]
        i += 1
         
    return product
         
lst1 = [1, 4, 8, 9, 6]
lst2 = [0, 7, 1, 3, 40]
 
print("Dot product = %d" % (calculate_dot_product(lst1, lst2)), end ="", sep ="")
 
 
 
'''
run:
 
Dot product = 303
 
'''

 

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Answer 2

def calculate_dot_product(lst1,  lst2) :
    return sum(i[0] * i[1] for i in zip(lst1, lst2))
        
lst1 = [1, 4, 8, 9, 6]
lst2 = [0, 7, 1, 3, 40]

print("Dot product = %d" % (calculate_dot_product(lst1, lst2)), end ="", sep ="")



'''
run:

Dot product = 303

'''

 

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