# Revision history [back]

### How do I multiply items within a CSV

Hi, I am trying to import a CSV file then find the product of all of the numbers within the file.

So far I have:

import csv

from numpy import prod

prod(data)

This doesn't

### How do I multiply items within a CSV

Hi, I am trying to import a CSV file then find the product of all of the numbers within the file.

So far I have:

import csv

from numpy import prod

prod(data)

This doesn't work. I think this is because of the format of how the list is created. This list data comes out in this format:

[['1'],['2'],['3']]

How do I coerce it into the format (1,2,3)?

### How do I multiply items within a CSV

Hi, I am trying to import a CSV file then find the product of all of the numbers within the file.file. The code I have used so far is:

import csv
from numpy import prod
prod(mylist)


However, this doesn't work, I receive the following error "TypeError: cannot perform reduce with flexible type".

So far I have:

import csv

[['1'],['2'],['3']]