阻止python打印每一个值，只打印一个？

Question

这是我打印代码时发生的情况：http://imgur.com/a/7nLug

我只想打印最后一行

即：'总数：891，pclass1：342（38.38％）

这是我的代码：

import csv
pclass = 0
pclass1 = [1]
pclass2 = [2]
pclass3 = [3]

pclass1_values = 0
pclass2_values = 0
pclass3_values = 0

total = 891

with open('titanic-new.csv', newline='') as csvfile:
    csv_reader = csv.reader(csvfile, delimiter= ',')
    next(csv_reader, None)
    for row in csv_reader:
        if int(row[pclass]) in pclass1:
            pclass1_values += 1
            print('total: {}, pclass1: {} ({:.2f}%)'.format(total, pclass1_values,
                                             pclass1_values/total*100))

input('press ENTER to exit')

Answer 1

将print语句放在for循环之外

import csv
pclass = 0
pclass1 = [1]
pclass2 = [2]
pclass3 = [3]

pclass1_values = 0
pclass2_values = 0
pclass3_values = 0

total = 891

with open('titanic-new.csv', newline='') as csvfile:
    csv_reader = csv.reader(csvfile, delimiter= ',')
    next(csv_reader, None)
    for row in csv_reader:
        if int(row[pclass]) in pclass1:
            pclass1_values += 1
    print('total: {}, pclass1: {} ({:.2f}%)'.format(total, pclass1_values,
                                             pclass1_values/total*100))

input('press ENTER to exit')