不确定如何将列表中的元素引用到if语句

Question

for row in range(numLines):
    if row[intIdx](3) is not 'DEP':
        check_total += float(row[intIdx][2])
    else:
        deposit_total += float(row[intIdx][2])

I'm very green to python, coming from vb.net, so it may not make sense.

I have a list that has 4 elements per line with a comma delimiter. This block of code is supposed to run through each "row" and compare the 4th element with the parameter of the if statement, and to carry on whatever operation depending on the results.

I keep getting the 'int' object is not a subscriptable error, which I suspect that it might be more errors on top of this one.

I just need an explanation of what is going on and how I can improve the code so that my program can run properly.

I thank everyone for any input they can give me.

Answer 1

This line is your problem:

if row[intIdx](3) is not 'DEP':

You need to create an array from the row, currently it is just a string. Here is the code:

for row in range(numLines):
    rowarray = row.split(',')
    if rowarray[3] != 'DEP':
        check_total += float(rowarray[2])
    else:
        deposit_total += float(rowarray[2])

Answer 2

You are looping through a range. numLines is either the size of a list or the length of an input file. Honestly I did not quite get your idea, but I think that is what you are trying to do.

with open('Transactions.txt') as file:
 for line in file: 
     rowarray = line.split(',')  

     if rowarray[3] != 'DEP':
        check_total += float(rowarray[2])
     else:
        deposit_total += float(rowarray[2])

When you write

for i in range(nuList):

you are basically doing

for i in [1, 2, 3, ...., N]: # being N the size of your list

Therefor you are not looping through your data but rather through the range of indexes.