如何在多个文本文件中搜索模式并写入新的多个文本文件

Question

import re
import glob
import os

list_of_files = glob.glob('10.123.130*.txt')
pattern = re.compile(r"^\S+ \S+ \S+ 205\d+.*$")

extract_on = False
extracts_eds_upe = []


for fileName in list_of_files:
   with open(fileName, 'r') as myfile:
      print(myfile)
      #lines = myfile.readlines()
      for line in myfile:
          if pattern.search(line) :
             extract_on = True
             extracts_eds_upe.append((line.rstrip('\n')))

      with open(os.path.join(r'D:\Python Project\DRP\UPE', os.path.basename(fileName)), 'w') as mytext:
          for line in extracts_eds_upe :
             mytext.write("undo ")
             mytext.write(line)
             mytext.write('\n')

-输入file#1

#
FTP server-source -i LoopBack0
FTP client-source -i LoopBack0
#
info-center loghost source LoopBack0
mpls switch-l2vc 10.123.146.97 205148001 tunnel-policy TE between 10.123.130.1 205148003 tunnel-policy TE backup 10.123.130.2 205148003 tunnel-policy TE encapsulation vlan
mpls switch-l2vc 10.124.24.165 205495401 tunnel-policy TE between 10.123.130.1 205495403 tunnel-policy TE backup 10.123.130.2 205495403 tunnel-policy TE encapsulation vlan
mpls switch-l2vc 10.123.146.53 205145401 tunnel-policy TE between 10.123.130.1 205145403 tunnel-policy TE backup 10.123.130.2 205145403 tunnel-policy TE encapsulation vlan
mpls switch-l2vc 10.123.146.49 213145001 tunnel-policy TE between 10.123.130.1 213145003 tunnel-policy TE backup 10.123.130.2 213145003 tunnel-policy TE encapsulation vlan
#

-输入file#2

#
FTP server-source -i LoopBack0
FTP client-source -i LoopBack0
#
info-center loghost source LoopBack0
mpls switch-l2vc 10.123.146.85 205148001 tunnel-policy TE between 10.123.130.1 205148003 tunnel-policy TE backup 10.123.130.2 205148003 tunnel-policy TE encapsulation vlan
mpls switch-l2vc 10.124.24.16 205495401 tunnel-policy TE between 10.123.130.1 205495403 tunnel-policy TE backup 10.123.130.2 205495403 tunnel-policy TE encapsulation vlan
mpls switch-l2vc 10.123.146.49 213145001 tunnel-policy TE between 10.123.130.1 213145003 tunnel-policy TE backup 10.123.130.2 213145003 tunnel-policy TE encapsulation vlan
#

-预期输出file#1

mpls switch-l2vc 10.123.146.97 205148001 tunnel-policy TE between 10.123.130.1 205148003 tunnel-policy TE backup 10.123.130.2 205148003 tunnel-policy TE encapsulation vlan
mpls switch-l2vc 10.124.24.165 205495401 tunnel-policy TE between 10.123.130.1 205495403 tunnel-policy TE backup 10.123.130.2 205495403 tunnel-policy TE encapsulation vlan
mpls switch-l2vc 10.123.146.53 205145401 tunnel-policy TE between 10.123.130.1 205145403 tunnel-policy TE backup 10.123.130.2 205145403 tunnel-policy TE encapsulation vlan

-预期输出file#2

mpls switch-l2vc 10.123.146.85 205148001 tunnel-policy TE between 10.123.130.1 205148003 tunnel-policy TE backup 10.123.130.2 205148003 tunnel-policy TE encapsulation vlan
mpls switch-l2vc 10.124.24.16 205495401 tunnel-policy TE between 10.123.130.1 205495403 tunnel-policy TE backup 10.123.130.2 205495403 tunnel-policy TE encapsulation vlan

我在文件中有多个文本文件和搜索模式，然后现在写到新的file.But中，输出多个文本的结果是一样的，实际上应该是不一样的。现在的问题是，当读取文本文件和匹配目标的模式，然后写到新文件，然后读取到第二个文件，匹配模式后也写入文件，但是当写入第二个文件时，我不想先从第二个文件中追加模式，这样我想在每个文件输出中分离出结果模式，任何人都可以帮助我。

Answer 1

我只是稍微修改了你的代码，请看，它应该能工作。

import re
import glob
import os

list_of_files = glob.glob('10.123.130*.txt')
pattern = re.compile(r"^\S+ \S+ \S+ 205\d+.*$")

for fileName in list_of_files:
   with open(fileName, 'r') as myfile:
      print(myfile)
      # Moved inside the loop.
      extract_on = False
      extracts_eds_upe = []

      for line in myfile:
          if pattern.search(line) :
             extract_on = True
             extracts_eds_upe.append((line.rstrip('\n')))

      # Moved inside the loop.
      with open(os.path.join(r'D:\Python Project\DRP\UPE', os.path.basename(fileName)), 'w') as mytext:
          for line in extracts_eds_upe :
              mytext.write("undo ")
              mytext.write(line)
              mytext.write('\n')

Answer 2

一行解析器，FYI：

find . -type f -name "10.123.130*.txt" | xargs -I{} sh -c "grep -E '^\S+ \S+ \S+ 205\d+.*$' {} > {}.result"

解释：

1. find . -type f -name "10.123.130*.txt"，列出当前directory.
2. xargs -I{} sh -c，下的所有匹配文件，将find结果按行拆分，并通过one.
3. grep -E '^\S+ \S+ \S+ 205\d+.*$'，将它们传递给下一个grep，通过regex匹配内容并输出到stdout.
4. > {}.result，，将grep结果重定向到带有.result后缀.

的名为源文件名的新文件。

尽情享受吧！