如何以编程方式编辑pg_hba.conf？

import re

def update_pg_hba_conf(file_path, new_entry):
    with open(file_path, 'r') as file:
        lines = file.readlines()

    # 查找并替换或添加新的条目
    new_lines = []
    added = False
    for line in lines:
        if line.strip().startswith('#'):
            new_lines.append(line)
            continue
        if not added and re.match(r'^\s*host\s+', line, re.IGNORECASE):
            new_lines.append(new_entry + '\n')
            added = True
        new_lines.append(line)

    if not added:
        new_lines.append(new_entry + '\n')

    with open(file_path, 'w') as file:
        file.writelines(new_lines)

# 示例用法
new_entry = "host    all             all             192.168.1.0/24            md5"
update_pg_hba_conf('/path/to/pg_hba.conf', new_entry)

sed -i '/^#.*host/s/^#//' /path/to/pg_hba.conf
echo "host    all             all             192.168.1.0/24            md5" >> /path/to/pg_hba.conf