实验任务6
源代码
1 with open('data6.csv','r',encoding='gbk')as f:
2 data=list(f.readlines())
3 data=[i.strip('\n') for i in data ]
4
5 import decimal
6 decimal.getcontext().rounding='ROUND_HALF_UP'
7 title=[data[0],'四舍五入后的数据']
8 data_new=[]
9 data_o=[]
10 for i in data:
11 if not i.isalpha() is True:
12 data_o.append(eval(i))
13 print('原始数据：')
14 print(data_o)
15 for i in data:
16 if not i.isalpha() is True:
17 data_new.append([i])
18
19 data_=[]
20 for i in data:
21 if not i.isalpha() is True:
22 index=data.index(i)-1
23 i=eval(i)
24 if i-int(i)>=0.5:
25 i=int(i)+1
26 data_new[index].append(str(i))
27 data_.append(i)
28 else:
29 i=int(i)
30 data_new[index].append(str(i))
31 data_.append(i)
32 print('四舍五入后的数据:')
33 print(data_)
34 import csv
35 with open('data6_processed.csv','w',encoding='gbk',newline='') as f :
36 f_writer=csv.writer(f)
37 f_writer.writerow(title)
38 f_writer.writerows(data_new)
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实验任务7
源代码
1 with open('data7.csv','r',encoding='gbk')as f:
2 title=[f.readline()]
3 data=f.readlines()
4 def getscore(ls):
5 return ls[len(ls)-1]
6
7 data=[line.strip('\n').split(',')for line in data]
8
9 data.sort(key=lambda x:(x[2],-int(x[3])))
10
11
12 with open('data7_processed.csv', 'w', encoding = 'gbk') as f:
13 f.write(','.join(title))
14 for item in data:
15 f.write(','.join(item) + '\n')
16 title=title[0].strip('\n').split(',')
17
18 print('{:<10}'.format(title[0]),'{:<10}'.format(title[1]),'{:<10}'.format(title[2]),'{:<15}'.format(title[3]))
19 for i in data:
20 print('{:<10}'.format(i[0]), '{:<10}'.format(i[1]), '{:<10}'.format(i[2]), '{:<10}'.format(i[3]))
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实验任务8
源代码
with open('hamlet.txt','r',encoding='gbk')as f: data=f.readlines() x='' for line in data: x+=line print('行数:',len(data)) print('字符数:',len(x)) print('单词数:',len(x.split())) print('空格数:',x.count(' '))for i in range(len(data)): if data[i]: data[i]=str(i+1)+' '+data[i] with open('hamlet_with_line_number.txt','w',encoding='gbk',newline='') as f : f.writelines(data)
实验任务9
源代码
1 with open('data9_id.txt','r',encoding='utf-8')as f:
2 data=f.readlines()
3
4 info=[line.strip('\n').split(',')for line in data]
5 del info[0]
6
7 def is_valid(id):
8 y=id[:17]
9 if (i in ['1','2','3','4','5','6','7','8','9','0','X'] for i in id) and len(id)==18 and y.isdigit() and (id[17]=='X' or id[17].isdigit()):
10 return True
11 else:
12 return False
13
14 print('姓名'+' '+'出生日期'+' '+'年龄')
15 import datetime
16 today=datetime.date.today()
17 valid_ls=[]
18 for ls in info:
19 if is_valid(ls[1]) is True:
20 y, m, d = ls[1][6:10], ls[1][10:12], ls[1][12:14]
21 birth = y + '-' + m + '-' + d
22 ls.append(birth)
23 del ls[1]
24 birthday=datetime.date(year=int(y),month=int(m),day=int(d))
25 age=str(round((today-birthday).days/365))
26 ls.append(age)
27 valid_ls.append(ls)
28 def takeThird(elem):
29 return elem[2]
30 valid_ls.sort(key=takeThird,reverse = True)
31 for ls in valid_ls:
32 for i in ls:
33 print('{:2}'.format(i),end=' ')
34 print()
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实验任务10
task10_1.py
源代码
1 with open('data10_stu.txt','r',encoding='utf-8') as f:
2 data=f.readlines()
3
4 n=int(input('输入随机抽取人数:'))
5 def random_selection(n):
6 import random
7 demo=random.sample(data,n)
8 return demo
9 x=random_selection(n)
10 for i in x:
11 print(i)
12
13 import datetime
14 t=datetime.datetime.now()
15 filename=t.strftime('%Y%m%d')+'.txt'
16
17 with open(filename,'w',encoding='utf-8') as f:
18 f.writelines(x)
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tast10_2
源代码
1 import datetime
2 t = datetime.datetime.now()
3 filename = t.strftime('%Y%m%d') + '.txt'
4
5 print('抽取开始'.center(50,'*'))
6 with open('data10_stu.txt', 'r', encoding='utf-8') as f:
7 data = f.readlines()
8
9 def random_selection(n):
10 import random
11 demo = random.sample(data, n)
12 return demo
13 selection=set()
14 numbers=[]
15
16 while True:
17 n = eval(input('输入随机抽点人数：'))
18 if n != 0:
19 x=random_selection(n)
20 for i in x:
21 print(i)
22 data.remove(i)
23 with open(filename,'a',encoding='utf-8') as f :
24 f.writelines(i)
25 else:
26 print('抽取结束'.center(50,'*'))
27 break
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标签：文件,encoding,open,编程,datetime,实验,ls,print,data From： https://www.cnblogs.com/zyj-/p/17454425.html