实验5 文件应用编程

task 6

源代码

with open('data6.csv', 'r', encoding='gbk') as f:
   data = f.readlines()
   data.pop(0)
   data = [eval(i.strip()) for i in data]
print(f'原始数据:\n{data}')

processed_data = [int(i+0.5) for i in data]
print(f'四舍五入后数据：\n{processed_data}')


import csv
title = ['原始数据', '四舍五入后数据']
with open('data6_processed.csv', 'w', encoding='gbk') as f:
    f_writer = csv.writer(f)
    f_writer.writerow(title)
    info = list(zip(data, processed_data))
    f_writer.writerows(info)

测试结果

task7

源代码

with open('data7.csv', 'r', encoding='gbk') as f:
    data = f.readlines()
    data = [i.strip().split(',') for i in data]
title = data[0]
data.pop(0)


data1 = sorted(data, key=lambda x: (x[2], -int(x[3])))
print(data1)
for i in title:
    print('{:18}'.format(i), end='')
print('\n')
for i in data1:
    print('{:<18}'.format(i[0]), '{:<18}'.format(i[1]), '{:<18}'.format(i[2]), '{:<18}'.format(i[3]))

import csv
with open('data7_processed.csv', 'w', encoding='utf-8') as f:
    f_writer = csv.writer(f)
    f_writer.writerow(title)
    f_writer.writerows(data1)

测试结果

task8

源代码

lines_count, words_count, char_count, blanks_count = 0, 0, 0, 0
text = []
with open('hamlet.txt', 'r', encoding='utf-8') as f:
    for line in f:
        words = line.split()
        lines_count += 1
        words_count += len(words)
        char_count += len(line)
        for i in line:
            if i == ' ':
                blanks_count += 1
        text.append(line)
print('hamlet.txt粗略统计')
print('行数:', lines_count)
print('单词数:', words_count)
print('字符数:', char_count)
print('空格数:', blanks_count)

newtext = []
n = 0
while n < len(text):
    newtext.append(str(n+1) + ' ' + text[n])
    n += 1

with open('hamlet_with_line_number.txt', 'w', encoding='utf-8') as f:
    for i in newtext:
        f.write(i)

测试结果

task9

源代码

def is_valid(x):
    if len(x) == 18 and x[:-2:].isnumeric():
        if x[-1] == 'X' or x[-1].isnumeric():
            return True
        else:
            return False
    else:
        return False

with open('data9_id.txt', 'r', encoding='utf-8') as f:
    data = f.readlines()
    data.pop(0)
data = [i.strip().split(',') for i in data]

import datetime
t = datetime.datetime.now()
year = int(t.strftime('%Y'))


data1 = []
for i in data:
    if is_valid(i[1]) is True:
        age = year-int(i[1][6:10])
        i[1] = i[1][6:10]+'-'+i[1][10:12]+'-'+i[1][12:14]
        i.append(str(age))
        data1.append(i)
data2 = sorted(data1, key=lambda x:-int(x[2]))

print('{:10}'.format('姓名')+'{:12}'.format('出生日期')+'{:10}'.format('年龄'))
for i in data2:
    print('{:<10}'.format(i[0])+'{:<15}'.format(i[1])+'{:<10}'.format(i[2]))

测试结果

task10-1

源代码

with open('data10_stu.txt', 'r', encoding='utf-8') as f:
    data = f.readlines()

import random
import datetime
n = int(input('输入随机抽点人数：'))
t = datetime.datetime.now()
filename = t.strftime('%Y%m%d')

for i in range(n):
    print(data[random.randint(1, len(data))])
with open('{}.txt'.format(filename), 'w', encoding='utf-8') as f:
    for i in range(n):
        f.write(data[random.randint(1, len(data))])

测试结果

task10-2

源代码

with open('data10_stu.txt', 'r', encoding='utf-8') as f:
    data = f.readlines()

import random
import datetime

t = datetime.datetime.now()
filename = t.strftime('%Y%m%d')
with open('{}*.txt'.format(filename), 'w', encoding='utf-8') as f:
    while True:
        n = int(input('输入随机抽点人数：'))
        for i in range(n):
            k = random.randint(1, len(data))
            print(data[k])
            f.write(data[k])
            data.pop(k)

        if n == 0:
            break

测试结果