Using the for loop to pull data from two lists

Question

On python I have two lists basicaly

xvales = [2, 4, 6, 8, 10, 12]
yvales = [100, 95, 90, 85, 80, 75]
sumation = 0

How can I use a for loop and pull corresponding values from each list to use in a formula.first iteration i=2 and j=100. second iteration i=4 and j=95. third iteration i=6 and j=90. I think you understand what I'm trying to do. I did try to do this.

For i in xvales and j in yvales:    
    v = i **2 / ( j+1 )    
    sumation += v

Answer 1

total = sum(i**2 / (j+1) for i,j in zip(xvalues, yvalues))

Answer 2

Use zip

>>> zip(xvales, yvales)
[(2, 100), (4, 95), (6, 90), (8, 85), (10, 80), (12, 75)]

Then, loop on it, and sum it:

sumation = sum(i **2 / ( j+1 ) for i, j in zip(xvales, yvales))

Edit

However, you probably want a float division, else this results in 2:

sumation = sum(i **2 / float( j+1 ) for i, j in zip(xvales, yvales))
# 4.475365812518561

Answer 3

Use the zip function to iterate over both at once.

Maintaining the rest of your structure:

for i, j in zip(xvales, yvales):
    v = i **2 / ( j+1 )    
    sumation += v

Answer 4

I think this does it

xvales = [2, 4, 6, 8, 10, 12]
yvales = [100, 95, 90, 85, 80, 75]
summation = sum([i ** 2 / (j+1) for i,j in zip(xvales, yvales)])