实验5 文件应用编程

task6

源代码：

with open('data6.csv', 'r', encoding='gbk') as f:
    old_data = f.read().split('\n')
del old_data[0]

new_data = []
for i in range(len(old_data)):
    if eval(old_data[i]) + float(0.5) >= int(eval(old_data[i])) + 1:
        new_data.append(str(int(eval(old_data[i]))+1))
    else:
        new_data.append(str(int(eval(old_data[i]))))

title = ['原始数据', '四舍五入后数据']
data = []
for i in range(len(old_data)):
    data.append([old_data[i], new_data[i]])

with open('data6.csv', 'w', encoding='gbk') as f:
    f.write(','.join(title) + '\n')
    for i in data:
        f.write(','.join(i) + '\n')
print('原始数据：')
print(old_data)
print('四舍五入后数据：')
print(new_data)

运行截图：

 

task7

源代码：

with open('data7.csv', 'r', encoding='gbk') as f:
    data1 = f.read().split('\n')
del data1[0]
lsta = []
lstm = []

for i in data1:
    lst1 = i.split(',')
    if lst1[2] == 'Acting':
        lsta.append(lst1)
    else:
        lstm.append(lst1)
lstm.sort(key=lambda x: x[-1], reverse=True)
lsta.sort(key=lambda x: x[-1], reverse=True)
info = lsta + lstm
title = ['学号', '姓名', '专业', '分数']

with open('data7_processed.csv', 'w', encoding='utf-8') as f:
    f.write(','.join(title)+'\n')
    for items in info:
        f.write(','.join(items)+'\n')
print('{:<10}'.format(title[0]), '{:<10}'.format(title[1]), '{:<10}'.format(title[2]), '{:<15}'.format(title[3]))
for i in info:
    print('{:<10}'.format(i[0]),'{:<10}'.format(i[1]),'{:<10}'.format(i[2]),'{:<15}'.format(i[3]))

运行截图：

 

task8

源代码：

with open('hamlet.txt', 'r', encoding='utf-8')as f:
    data = f.readlines()
    print('hamlet.txt粗略统计：')
    print('行数：', len(data))

x = ''
for line in data:
    x += line
alpha = 0
b = 0
for i in x:
    if i.isalpha():
        alpha += 1
    else:
        b += 1

word = len(x.split())
print('字符数：', alpha+b)
print('单词数：', word)
print('空格数：', x.count(' '))
data = [line.strip('\n').split(',') for line in data]
with open('hamlet_with_line_number', 'w', encoding='utf-8') as f:
    for i, j in enumerate(data, start=1):
        j = j[0]
        f.write("{}{}{}".format(i, ' ', j)+'\n')

运行结果：

 

task9

源代码：

print('姓名,出生日期,年龄')
for i in data:
    lst = i.split(',')
    data2.append(lst)
lst2 = []
for i in data2:
    if is_valid(i[1]) == True:
        name = i[0]
        btd = i[1][6:14]
        age = str(2023 - int(i[1][6:10]))
        lst2.append([name, btd, age])
lst2.sort(key=lambda x: x[2], reverse=True)
for i in lst2:
    print(i[0], end=',')
    print(f'{i[1][:4]}-{i[1][4:6]}-{i[1][6:8]}', end=',')
    print(i[2])

运行截图：

 

task10_1

源代码：

with open('data10_stu.txt','r',encoding='utf-8') as f:
    data = f.readlines()
print('{:*^40}'.format('抽点开始'))
n = int(input('输入随机抽点人数:'))
import random
x = []
x2 = ''
counts = 0
while counts < n:
    new = random.randint(0, len(data) - 1)
    if new in x:
        new = random.randint(0, len(data) - 1)
    else:
        counts += 1
        x.append(new)
sum1 = 0
for i in range(n):
    print(data[x[i]])
    x2 += data[x[i]]
    sum1 += n
with open('20230602.txt', 'w', encoding='utf-8') as f:
    f.writelines(x2)

运行截图;

 

task10_2

源代码：

with open('data10_stu.txt', 'r', encoding='utf-8') as f:
    data = f.readlines()
print('{:*^40}'.format('抽点开始'))
n = int(input('输入随机抽点人数:'))
import random
x = []
sum1 = 0
x2 = ''
while n != 0:
    counts = 0
    while counts < n:
        new = random.randint(0, len(data) - 1)
        if new in x:
            new = random.randint(0, len(data) - 1)
        else:
            counts += 1
            x.append(new)
    for i in range(sum1, sum1+n):
        print(data[x[i]])
        x2 += data[x[i]]
    sum1 += n
    n = int(input('输入随机抽点人数:'))

with open('20230601.txt', 'w', encoding='utf-8') as f:
    f.writelines(x2)

print('{:*^40}'.format('抽点结束'))

运行截图：