Python 将带有附加信息的数据附加到文件中的文本

我有一个包含数千行代码的文本文件，我想替换某些元素，如下所示：

文件1中的文本：

serverfarm host foobar2:443
  failaction reassign
  probe tcp111-probe
  rserver foobar1 443
  rserver foobar2 443

包含我希望附加到原始文件文本（文件2）的附加信息的文本：

因此，我们可以看到，在原始文件中，

rserver

行没有捕获IP地址，但我在另一个文件中有此信息

之前：

rserver foobar1 443

之后（期望输出）

---

rserver foobar1 443

我们的想法是编写一个自定义解析器/转换器，如下所示：

replacements = {}
with open('file2.txt') as f:
    for l in f:
        l = l.strip()
        if l.startswith('rserver'):
            server_header = l
            server = l.split()
            server_name = server[2]
        elif 'ip address' in l:
            ip_address = l
        elif 'service' in l:
            service = l
            replacements[server_name] = (server_header, ip_address, service)

with open('file1.txt') as f, open('out.txt', 'w') as out:
    for l in f:
        l = l.rstrip()
        if 'rserver' in l:
            server = l.split()
            server_name = server[1]
            out.write(l + '\n')
            out.write('  ' + replacements[server_name][0] + '\n')
            out.write('    ' + replacements[server_name][1] + '\n')
            out.write('    ' + replacements[server_name][2] + '\n')                
        else:
            out.write(l + '\n')

输出（out.txt）

---

其想法是编写一个自定义解析器/转换器，如下所示：

replacements = {}
with open('file2.txt') as f:
    for l in f:
        l = l.strip()
        if l.startswith('rserver'):
            server_header = l
            server = l.split()
            server_name = server[2]
        elif 'ip address' in l:
            ip_address = l
        elif 'service' in l:
            service = l
            replacements[server_name] = (server_header, ip_address, service)

with open('file1.txt') as f, open('out.txt', 'w') as out:
    for l in f:
        l = l.rstrip()
        if 'rserver' in l:
            server = l.split()
            server_name = server[1]
            out.write(l + '\n')
            out.write('  ' + replacements[server_name][0] + '\n')
            out.write('    ' + replacements[server_name][1] + '\n')
            out.write('    ' + replacements[server_name][2] + '\n')                
        else:
            out.write(l + '\n')

输出（out.txt）

---

如果您运行的是Linux发行版，那么您可以使用awk命令，并使用grep对其进行管道传输

如果您想要一个使用python的解决方案，那么复杂性将是O（n.m），其中n是第一个文件中的行数，m是第二个文件中的行数

python中的算法：

open a new file, file3
file1 = f.open(path to file 1)
n = number of lines in file1
file2 = f.open(path to file 2)
m = number of lines in file 2
for i in range(n):
   r = readline(file1)
   copy line into file3
   convert r to array and check to see if r[0] is "rserver"
   if r[0]=="rserver" then:
      for j in range(m):
         k = readline(file2)
         convert k to array and check to see if k[0] is "rserver"
         if k[0]=="rserver" then:
            merge required number of lines from file2 into file3
            increment j by x
close all files

---

希望这有帮助

如果您运行的是Linux发行版，那么您可以使用awk命令并将其与grep连接起来

如果您想要一个使用python的解决方案，那么复杂性将是O（n.m），其中n是第一个文件中的行数，m是第二个文件中的行数

python中的算法：

open a new file, file3
file1 = f.open(path to file 1)
n = number of lines in file1
file2 = f.open(path to file 2)
m = number of lines in file 2
for i in range(n):
   r = readline(file1)
   copy line into file3
   convert r to array and check to see if r[0] is "rserver"
   if r[0]=="rserver" then:
      for j in range(m):
         k = readline(file2)
         convert k to array and check to see if k[0] is "rserver"
         if k[0]=="rserver" then:
            merge required number of lines from file2 into file3
            increment j by x
close all files

---

希望这有帮助

是的，您可以使用字典或从第二个文件映射服务器名称及其详细信息列表（ip和服务状态），并在写入新文件时插入这些详细信息：

from collections import defaultdict
import re

d = defaultdict(list)
with open('file1.txt') as f1, open('file2.txt') as f2, open('output.txt', 'w') as f3:
    for line in f2:
        if 'host' in line:
            key = line.strip().replace('host ', '')
        d[key].append('  ' + line) # match indentation in file1 with leading spaces

    for line in f1:
        f3.write(line if '\n' in line else line+'\n')
        if 'rserver' in line:
            f3.writelines(d[re.sub(r'\s\d+', '', line.strip())])

---

output.txt：

---

是的，您可以使用字典或从第二个文件映射服务器名称及其详细信息列表（ip和服务状态），并在写入新文件时插入这些详细信息：

from collections import defaultdict
import re

d = defaultdict(list)
with open('file1.txt') as f1, open('file2.txt') as f2, open('output.txt', 'w') as f3:
    for line in f2:
        if 'host' in line:
            key = line.strip().replace('host ', '')
        d[key].append('  ' + line) # match indentation in file1 with leading spaces

    for line in f1:
        f3.write(line if '\n' in line else line+'\n')
        if 'rserver' in line:
            f3.writelines(d[re.sub(r'\s\d+', '', line.strip())])

---

output.txt：

---

不同意你的复杂性评估，我的方法的复杂性是O（n）不同意你的复杂性评估，我的方法的复杂性是O（n）

serverfarm host foobar2:443
  failaction reassign
  probe tcp111-probe
  rserver foobar1 443
  rserver host foobar1
    ip address 1.1.1.1
    inservice
  rserver foobar2 443
  rserver host foobar2
    ip address 1.1.1.2
    inservice