Calculating the sum of a list's item.

[frequency]

Hello.
With this function

def digit_sum(number):
    value = str(number)
    digits = [int(x) for x in value]
    return sum(digits)

You can get the sum of one splited item given from the user. How can i make it so it does the same fuction but instead it will be given a list and lastly how can i replace the results that this function gave me with the number that it initially got in order to make the calculation? For example if it got the list

list=[1,25,5,30]

and it made the calculations,so we have as a unofficial result 7,3.My goal is to get the summed numbers which in case are 7 and 3 and add them to the list that the fuction got my numbers from. So we must have

list=[1,7,5,3]

Thank you

---

I think i got it

lista=[1,96,3]
lista_sum=[]
def digit_sum(LIST):
    for i in range(len(LIST)):
      value = str(LIST[i])
      digits = [int(x) for x in value]
      lista_sum.append(sum(digits))
      print (sum(digits))
      

digit_sum(lista)
print (lista_sum)

If you can suggest something please feel free to!