实验5 文件应用编程

5.3

with open('5//data3.txt','r')as f:
    data=f.read().split('\n')
del data[0]
a=list(map(float,data))
b=[]
for i in a:
    if i-int(i)<=0.4:
        b.append(int(i))
    elif i-int(i)>0.5:
        b.append(int(i)+1)
    elif i-int(i)==0.5:
        if int(i)%2==0:
            b.append(int(i))
        else:
            b.append(int(i)+1)
c=['原始数据\t四舍五入后数据\t\n']
for i,j in zip(a,b):
    c.append(str(i)+'\t'+'          '+str(j)+'\n')

with open('data3_processed.txt','w')as f:
    f.write(''.join(c))
    print('原始数据：')
    print(a)
    print('四舍五入后数据：')
    print(b)

 

5.4

with open('5//data4.txt','r')as f:
    data=f.readlines()
for i in range(len(data)):
    data[i]=data[i].rstrip('\n')

a=[]
for i in range(len(data)):
    a.append(data[i].split('\t'))
m=a[0]
del a[0]
b=sorted(a, key=lambda a: a[2])

c=[]
for i in range(len(b)):
    if b[i][2]=='Acting':
        c.append(b[i])
c=sorted(c, key=lambda c: c[3], reverse=True)

d=[]
for i in range(len(b)):
    if b[i][2]=='Music':
        d.append(b[i])
d=sorted(d, key=lambda d: d[3], reverse=True)

e=[]
e.append(m)
for i in c:
    e.append(i)
for i in d:
    e.append(i)
for i in range(len(e)):
    for j in range(len(m)):
        e[i][j]=e[i][j].ljust(5)+'\t'
for i in e:
    print(''.join(i))

with open('data4_processed.txt','w')as f:
    for line in e:
        f.write(' '.join(line).ljust(5)+'\n')

 

5.5

line_count=0
space_count=0
with open('5//data5.txt','r')as f:
    data1=f.readlines()
for line in data1:
    if '\n' in line:
        line_count=line_count+1

with open('5//data5.txt','r')as f:
    data2=f.read()
a=list(data2)
for i in a:
    if i=='\n':
        a.remove('\n')
for i in a:
    if i.isspace():
        space_count=space_count+1

print('行数：',line_count+1)
print('单词数：',len(data2.split()))
print('空格数：',space_count)
print('字符数：',len(data2))

with open('data5_with_line','w')as f:
    for i in range(line_count+1):
        f.writelines(str(i+1)+' '+data1[i])

 

 

 实验总结：

应该搞清楚绝对路径和相对路径。