计算CSV文件Python中最后一项的行数是1还是0

Question

I have CSV file like this:

2,1,2,3,1
23,3,2,22,0
2,2,11,2,0
1,2,2,1,1
    .
    .
44,3,3,44,0
2,2,11,2,0

Each row ended with 1 or 0, I want to count the prior probability for 1 or 0 by counting how many row with last item is 1 or 0 divide by total rows. How to solve it in python. Thank you.

Answer 1

import csv

total = 0
zeros = 0
ones = 0
with open('path/to/file') as infile:
    for row in csv.reader(infile):
        total += 1
        if row[-1] == '0': zeros += 1
        if row[-1] == '1': ones += 1

# do some division to calculate priors