获取恰好包含一个特殊字符的行

import re

def get_lines_with_special_character(file_path, special_character):
    lines = []
    with open(file_path, 'r') as file:
        for line in file:
            if re.search(special_character, line):
                lines.append(line)
    return lines

file_path = 'example.txt'
special_character = '@'
lines_with_special_character = get_lines_with_special_character(file_path, special_character)
for line in lines_with_special_character:
    print(line)