#task3 with open('data3.txt','r',encoding='utf-8')as f1: with open('data3_processed.txt','w',encoding='utf-8')as f2: a=f1.read().split('\n') a.pop(0) c=[] d=[eval(i) for i in a] for i in a: x=eval(i) if x-int(x)<0.5: c.append(int(eval(i))) else: c.append(int(eval(i))+1) d2=[int(i)for i in c] f2.write(f'原始数据\t四舍五入后的数据\n') for i in range(len(d)): f2.write(f'{d[i]}\t\t{d2[i]}\n') print(f'原始数据：\n{d}\n四舍五入后的数据：\n{c}') 
#task4 with open('data4.txt','r',encoding='utf-8') as f: data=f.readlines() data.remove(data[0]) x0=[] for i in data: a=i.split() x0.append(a) x1=sorted(x0,key=(lambda x:x[2])) x2=[x1[i] for i in range(0,8)] x3=sorted(x2,key=(lambda x:x[3]),reverse=True) x4=[x1[i] for i in range(8,10)] x5=sorted(x4,key=(lambda x:x[3]),reverse=True) y=x3+x5 y1=[] for i in y: b='\t'.join(i) b=b+'\n' y1.append(b) y1.insert(0,'学号\t姓名\t专业\t分数\n') for i in y1: print(i) with open('data4_processed.txt','w',encoding='utf-8') as f: for i in y1: f.write(i) 
#task5 with open('data5.txt','r',encoding='utf-8')as f: with open('data5_with_line.txt', 'w', encoding='utf-8') as f1: a=f.read().strip('\n') b = len(a.splitlines()) print('行数:', b) c = len(a.split()) print('单词数:', c) d = 0 for i in a: if i == ' ': d += 1 print('空格数:', d) e = 0 for e, number in enumerate(a): e += 1 print('字符数:', e) a=a.split('\n') n='\n'.join(a) for i in range(len(a)): f1.write(f'{i+1}.{a[i]}\n') 