elasticsearch如何使用script(python)的复杂语句？

版本：5.4.1
 
问题描述：
测试一：简单的替换值

{

    "query": {

        "terms": {

            "objectid.keyword": [

                "81FB61F1-B45E-4180-8336-D8D2B6DF6827",

                "DD5C98E4-629F-4F63-99C3-86841C8DBEF1",

                "DD7E8F66-6473-4DCF-B84F-4B85299EE6DD"

            ]

        }

    },

    "script": {

        "lang": "python",

        "inline": "ctx['_source']['system_version'] = 'aczxczxc'"

   

    }

}

测试二：替换array中第一个元素的key对应的value

{

    "query": {

        "terms": {

            "objectid.keyword": [

                "81FB61F1-B45E-4180-8336-D8D2B6DF6827",

                "DD5C98E4-629F-4F63-99C3-86841C8DBEF1",

                "DD7E8F66-6473-4DCF-B84F-4B85299EE6DD"

            ]

        }

    },

    "script": {

        "lang": "python",

        "inline": "i = ctx['_source']['city_info'][0];i['permanent_country'] = i['isp']"

    }

}

 像上面测试一、测试二这种的替操作换是没有任何问题的，测试都能成功。
但是如果使用for循环的话，就直接报错了，感觉还是语法问题，但是网上能找到的资料是在太少了：
测试三：

{

    "query": {

        "terms": {

            "objectid.keyword": [

                "81FB61F1-B45E-4180-8336-D8D2B6DF6827",

                "DD5C98E4-629F-4F63-99C3-86841C8DBEF1",

                "DD7E8F66-6473-4DCF-B84F-4B85299EE6DD"

            ]

        }

    },

    "script": {

        "lang": "python",

        "inline": "for i in [1,2]:;print(i)"

    }

}

{

    "query": {

        "terms": {

            "objectid.keyword": [

                "81FB61F1-B45E-4180-8336-D8D2B6DF6827",

                "DD5C98E4-629F-4F63-99C3-86841C8DBEF1",

                "DD7E8F66-6473-4DCF-B84F-4B85299EE6DD"

            ]

        }

    },

    "script": {

        "lang": "python",

        "inline": "for i in ctx['_source']['city_info'];i['permanent_country'] = i['isp']"

    }

}

这种for都不行。api除了返回“py_syntax_error”没有更多提示信息