Delete item in a list using a for-loop

Question

I have an array with subjects and every subject has connected time. I want to compare every subjects in the list. If there are two of the same subjects, I want to add the ti

Answer 1

If the elements of subject are hashable:

finalinfo = {}

for s, t in zip(subject, time):
  finalinfo[s] = finalinfo.get(s, 0) + t

This will result in a dict with subject: time key-value pairs.