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+--- Thread: How to separate the values in an element to add them (/thread-39260.html)
How to separate the values in an element to add them - monty024 - Jan-23-2023
Greetings,
I have a python question.. I have a list with the following four elements.
What I want to do is add the vales in element 1 (17,21,29,35,36) to get the sum (138)
The area I am having the problem is how add the numbers in that element?
The numbers are all part of element 1, how would I separate them in to integers so I can add them to get the sum?
Here is an example of a list.
['01/21/2023', '17,21,29,35,36', '1,E','37.43']
Any help or guidance would be greatly appreciated.
Regards,
Monty
RE: How to separate the values in an element to add them - rob101 - Jan-23-2023
This would be one way:
the_list = ['01/21/2023', '17,21,29,35,36', '1,E', '37.43']
numbers = the_list[1].split(',')
total = 0
for number in numbers:
total += int(number)
print(total)Or, you could do that directly:the_list = ['01/21/2023', '17,21,29,35,36', '1,E', '37.43']
total = 0
for number in the_list[1].split(','):
total += int(number)
print(total)
RE: How to separate the values in an element to add them - monty024 - Jan-23-2023
Wow!! Thank you Rob101! I spent a week trying to figure this out.. I was close.
I was using the split but I was getting the comma between each value..
RE: How to separate the values in an element to add them - rob101 - Jan-23-2023
(Jan-23-2023, 01:04 AM)monty024 Wrote: Wow!! Thank you Rob101!
You're welcome; pleased to help.
Yet another way, I just thought of:
the_list = ['01/21/2023', '17,21,29,35,36', '1,E', '37.43']
int_numbers = []
for number in the_list[1].split(','):
int_numbers.append(int(number))
print(sum(int_numbers))Edit to add: it depends on what you want to do with the numbers. If you want to use them later on, then maybe use my 3rd way, as you'll have a list object that holds said numbers, but if all you want is the total, then there's little point in creating an object to hold them.
RE: How to separate the values in an element to add them - deanhystad - Jan-23-2023
Lots of ways to do this. Here are a 3 more.
from functools import reduce
values = '1,2,3,4,5'
print(sum(int(n) for n in values.split(',')))
print(sum(map(int, values.split(','))))
print(reduce(lambda a, b: a + int(b), values.split(','), 0))I presented the choices in my order of preference. Comprehensions are very useful and something you need to know how to use. map() is like a one-trick-pony version of a comprehension. I don't find reduce() very useful.