Math error using data from sqlite3 in python program?

Question

from math import *
import sqlite3
conn = sqlite3.connect('person.sqlite3')

def main():
    agelist = conn.execute("SELECT age from person where age!='NA'")
    ages = []
    for row in agelist: ages += [row [0]]

    sumthis = []
    for row in agelist:
        sumthis += [row[0**2]]
    sqrted=sum(sumthis)
    print(sqrted)

I am trying to square every row of data in agelist, and find the sum of all of those squared numbers. Right now this is giving me 0 as an answer. I want sum(age^2 for each age in ages list) How can I correct this?

Answer 1

I think, you should replace

sumthis += [row[0**2]]

With,

sumthis += [row[0]**2]

Or, more appropriately,

sumthis.append(row[0]**2)

That's because, forming a new list and add two list at every iteration isn't a good idea.

For the same reason, change

for row in agelist: ages += [row [0]]

To:

for row in agelist: ages.append(row [0])