如何使用Python编辑XML文件?

!DOCTYPE 线路?是第一次吗 !DOCTYPE 线路?等

import os
import sys

# Assumes first argument when running the script is a directory containing XML files
directory = sys.argv[1] if len(sys.argv) > 1 else "."
files = os.listdir(directory)

for f in files:
    # Ignore not XML files
    if not f.endswith(".xml"):
        continue

    # Read file content
    with open(f, 'r') as f_in:
        content = f_in.readlines()

    # Rewrite the original file
    with open(f, 'w') as f_out:
        for line in content:
            # The condition may differ based on what you really want to delete
            if line != "<!DOCTYPE pdf2xml SYSTEM \"pdf2xml.dtd\">\n":
                f_out.write(line)

2. 例如,如果您希望始终只删除文件中的第二行,则效率低下。

3. 您真的需要/想要使用Python来实现这一点吗?有更好的解决办法。例如,如果您在Linux或Mac上,您可以使用 sed :

   for f in *.xml; do sed -i '' -n '/<!DOCTYPE pdf2xml SYSTEM "pdf2xml.dtd">/!p' $f; done
   

f = open("yourfile.txt","r")

接下来,从文件中获取所有行:

lines = f.readlines()

现在可以关闭该文件:

f.close()

f = open("yourfile.txt","w")

然后,写回你的行,除了你想删除的行。您可能希望将“\n”更改为文件结尾的任何行。

for line in lines:
  if not line.startswith('<!DOCTYPE'):
    f.write(line)

最后,再次关闭该文件。

f、 关闭()