Python B 文件里的每行数据匹配 A 文件里的内容 逻辑问题

A 文件是个 json 文件： a.txt

{
	"_id": "113.254.82.124",
	"_index": "fofapro_subdomain",
	"header": "HTTP/1.1 401 Unauthorized\r\nConnection: close\r\nContent-Length: 195\r\nCache-Control: no-cache\r\nContent-Type: text/html\r\nDate: Sat, 20 Oct 2018 15:59:44 GMT\r\nEtag: \"0-29d-b90\"\r\nServer: Embedthis-Appweb/3.3.1\r\nWww-Authenticate: Basic realm=\"DCS-2530L\"\r\nX-Frame-Options: SAMEORIGIN\r\n",
}
{
	"_id": "http://10.254.82.12",
	"_index": "fofapro_subdomain",
	"header": "HTTP/1.1 401 Unauthorized\r\nConnection: close\r\nContent-Length: 195\r\nCache-Control: no-cache\r\nContent-Type: text/html\r\nDate: Sat, 20 Oct 2018 15:59:44 GMT\r\nEtag: \"0-29d-b90\"\r\nServer: Embedthis-Appweb/3.3.1\r\nWww-Authenticate: Basic realm=\"DCS-2530L\"\r\nX-Frame-Options: SAMEORIGIN\r\n",
}
{
	"_id": "https://192.168.1.10:9090",
	"_index": "fofapro_subdomain",
	"header": "HTTP/1.1 401 Unauthorized\r\nConnection: close\r\nContent-Length: 195\r\nCache-Control: no-cache\r\nContent-Type: text/html\r\nDate: Sat, 20 Oct 2018 15:59:44 GMT\r\nEtag: \"0-29d-b90\"\r\nServer: Embedthis-Appweb/3.3.1\r\nWww-Authenticate: Basic realm=\"DCS-2530L\"\r\nX-Frame-Options: SAMEORIGIN\r\n",
}
{
	"_id": "127.0.0.1:8343",
	"_index": "fofapro_subdomain",
	"header": "HTTP/1.1 401 Unauthorized\r\nConnection: close\r\nContent-Length: 195\r\nCache-Control: no-cache\r\nContent-Type: text/html\r\nDate: Sat, 20 Oct 2018 15:59:44 GMT\r\nEtag: \"0-29d-b90\"\r\nServer: Embedthis-Appweb/3.3.1\r\nWww-Authenticate: Basic realm=\"DCS-2530L\"\r\nX-Frame-Options: SAMEORIGIN\r\n",
}

B 文件： b.txt

127.0.01
192.168.1.10
192.168.88.88

代码

import re
import json

def filesJson(filepath,dstpaths):
    datas = set()
    #正则匹配
    rule = re.compile('^[a-zA-z]{1}.*$')
    with open(filepath, 'r', encoding='UTF-8') as a, open(dstpaths, 'r', encoding='UTF-8') as b:
        b.seek(0)
        for realine_a in a:
            json_datas = json.loads(realine_a)
            ips = json_datas['_id']
            if rule.findall(ips):
                ips = ips.strip("http[s]?://")
                ips = ips.split(":")[0]
                datas.add(ips)
        for realine_b in b:
            if realine_b in datas:
                print(realine_b)
            else:
                break

if __name__ == '__main__':
    file_paths = "a.txt"
    dstpaths = 'b.txt'
    filesJson(file_paths, dstpaths)

我的想法是把 A 文件里的 IP，去除协议和端口，只保留 IP 写入到一个集合中，然后在通过 B 文件的数据去匹配这个集合，有没有这个 IP，如果有这个 IP，把 A 文件这行数据写入到 C 文件中，现在问题是 B 文件无法匹配 A 文件的数据，而且如果 A 文件内容是几百万行数据，B 文件内容是几万行数据，这种逻辑是不是有很大的问题。