Python检索函数regex issu

Question

我有以下代码：

#!/usr/bin/python

import time, uuid, hmac, hashlib, base64, json
import urllib3
import certifi
import datetime
import requests
import re
from datetime import datetime

http = urllib3.PoolManager(
    cert_reqs='CERT_REQUIRED', # Force certificate check.
    ca_certs=certifi.where(),  # Path to the Certifi bundle.
)

#Get the status response from pritunl api
BASE_URL = 'https://www.vpn.trimble.cloud:443'
API_TOKEN = 'gvwrfQZQPryTbX3l03AQMwTyaE0aFywE'
API_SECRET = 'B0vZp5dDyOrshW1pmFFjAnIUyeGtFy9y'
LOG_PATH = '/var/log/developer_vpn/'
def auth_request(method, path, headers=None, data=None):
    auth_timestamp = str(int(time.time()))
    auth_nonce = uuid.uuid4().hex
    auth_string = '&'.join([API_TOKEN, auth_timestamp, auth_nonce,
        method.upper(), path] + ([data] if data else []))
    auth_signature = base64.b64encode(hmac.new(
        API_SECRET, auth_string, hashlib.sha256).digest())
    auth_headers = {
        'Auth-Token': API_TOKEN,
        'Auth-Timestamp': auth_timestamp,
        'Auth-Nonce': auth_nonce,
        'Auth-Signature': auth_signature,
    }
    if headers:
        auth_headers.update(headers)
    return http.request(method, BASE_URL + path, headers=auth_headers, body=data)


response1 = auth_request('GET',
  '/server',
)
if response1.status == 200:
    pritunlServResponse = (json.loads(response1.data))
    #print pritunlServResponse
    #print response1.data

    Name = [y['name'] for y in pritunlServResponse]
    Server_id = [x['id'] for x in pritunlServResponse]

    for srv_name, srv_id in zip(Name, Server_id):
        response2 = auth_request('GET',
        '/server/' + srv_id + '/output',
        )
        pritunlServResponse2 = (json.loads(response2.data))
        py_pritunlServResponse2 = pritunlServResponse2['output']

        print("value of srv_id: ", srv_id, "\n")
        print("value of srv_name: ", srv_name, "\n") 

        logfile = open(LOG_PATH + srv_name +'_vpn_out.log', 'w')
        for log in py_pritunlServResponse2:
            if re.search(r'(?!52\.39\.62\.8)', log):
                logfile.write("%s\n" % log)

        logfile.close()

else:
    raise SystemExit

这段代码使用身份验证访问一个网站（地址已被编辑），获取一些JSON格式的文本，并从输出中解析两个值：“srv\u name”和“srv\u id”。然后，该代码使用“srv\u id”构造额外的HTTP请求，以从服务器获取日志文件。然后它获取日志文件-每个“srv\u id”一个，并用从“srv\u name”获得的值命名它们，并将它们保存在本地系统上。你知道吗

在将文件写入本地系统之前，我想做一些额外的grep风格的处理。具体来说，我想排除任何文本完全包含“52.39.62.8”的书面。当我运行上面的代码时，似乎没有处理regex，因为我在输出文件中仍然看到“52.39.62.8”。你知道吗

Answer 1

如果IP地址的两侧总是有特定的字符，例如：(52.39.62.8):，则可以使用in表示确切的包含：

if '(52.39.62.8):' not in log:
    logfile.write(log + '\n')

Answer 2

re.search(r'(?!52\.39\.62\.8)', log)

您正在匹配任何不后跟ip地址的空字符串-每个字符串都将匹配，因为这将匹配任何字符串的结尾。你知道吗

只有当ip地址的re.search返回为None时，才反转逻辑并将行输出到日志。你知道吗

if re.search(r'(?<!\d)52\.39\.62\.8(?!\d)', log) is None:
    logfile.write("%s\n" % log)

请注意，这还包括它自己的反向向后看和向前看断言，以确保ip地址前面或后面没有数字。你知道吗