How can I convert list values to integers in Python

Question

I used import csv to convert a csv file to a list. However, the values were converted to string format. I want to convert them to integers.

When I print the list, it shows up in this format:

[ [‘1’],[‘2’],[‘3’] ]

I suspect there’s an issue since it is in this format?

Thanks for your help!

Answer 1

lis=[ ['1'],['2'],['3'] ]

intlis=[]
for j in lis:
for i in j:
intlis.append(int(i))
print(intlis)

print("`",ord('`'))
print("'",ord("'"))
#[ [‘1’],[‘2’],[‘3’] ]
#note that your apstrophe is not the correct one

Answer 2

because your import loop imports elements as lists it makes a nested list with all elements as lists.
Remove the import as lists and do it in values instead.
for element in file:
list.append(int(element))

Answer 3

As a beginner, i see this as a three lists inside a list. Maybe append an element from second/third sub-list into a first sub-list, then pull out the first sub-list as a separate list? That could be the moment for converting the elements into integers.

Answer 4

Thanks for the input. Based upon your feedback, I used a script to un nest the list.

Answer 5

Thanks Louis. That worked. Thanks everyone

Answer 6

I would not use example from Louis if you can import it without that list nesting in the firat place since it takes unnecessary resources