def extract_geogebra_code(file_path):
    with open(file_path, 'r', encoding='utf-8') as f:
        content = f.read()

    import re
    # 匹配代码块内容（不含标记）
    pattern = r'```geogebra\n(.*?)\n```'
    match = re.search(pattern, content, re.DOTALL)

    if match:
        # 移除首尾空白行并返回纯代码内容
        code_content = match.group(1).strip()
        return code_content
    return ''


# 使用示例
file_path = r'd:\dsWork\dsProject\dsLightRag\GeoGeBra\GGB.txt'
result = extract_geogebra_code(file_path)
print(result)