Python列表-如何使用dns.resolver.query for循环的域列表

编辑

嘿，这里是我的工作代码在它的整体。我相信它可以改进，但我仍在学习

import dns
import dns.resolver
import os
import csv
import dns.resolver

file = "domains.txt"
f = open(file)
data = f.read()
f.close
list = []

for url in data:
    answers = dns.resolver.query(url, 'MX')
    for rdata in answers:
        x = [rdata.exchange, rdata.preference]
        print(x)
        list.append([x])

---

您的

url

数据包括尾随的换行符。使用

.strip（）

删除数据中的任何前导或尾随空格。试试这个：

import dns
import dns.resolver
import os
import csv

##tested on python 2.7 only

errcountA = 0
errcountMX = 0
listoflists = []

with open("domains.txt") as f:
    for url in f:
        A = []
        MX = []
        url = url.strip()
        try: 
            answers = dns.resolver.query(url, 'A') ##Get the A record
            for rdata in answers:
                A.append(rdata.address) ## Add A Records to list
        except: ## Incase the URL doesnt resolve
            A = "Error resolving"
            errcountA += 1

        try: ##Get the MX record
            answers = dns.resolver.query(url, 'MX')
            for rdata in answers:
                MX.append([rdata.preference, rdata.exchange])

        except: ##incase url doesnt resolver
            MX = "Error resolving"
            errcountMX += 1

        list = [url, MX, A]
        print(list)
        listoflists.append(list)

with open('output.csv', 'wb') as csvfile: ##write the csv file
    writer = csv.writer(csvfile)
    for r in listoflists:
        writer.writerow(r)

print listoflists
print ("There were %e A record errors") %errcountA
print ("There were %f MX record errors") %errcountMX
print ("Done!")

---

您的

url

数据包括尾随的换行符。使用

.strip（）

删除数据中的任何前导或尾随空格。试试这个：

import dns
import dns.resolver
import os
import csv

##tested on python 2.7 only

errcountA = 0
errcountMX = 0
listoflists = []

with open("domains.txt") as f:
    for url in f:
        A = []
        MX = []
        url = url.strip()
        try: 
            answers = dns.resolver.query(url, 'A') ##Get the A record
            for rdata in answers:
                A.append(rdata.address) ## Add A Records to list
        except: ## Incase the URL doesnt resolve
            A = "Error resolving"
            errcountA += 1

        try: ##Get the MX record
            answers = dns.resolver.query(url, 'MX')
            for rdata in answers:
                MX.append([rdata.preference, rdata.exchange])

        except: ##incase url doesnt resolver
            MX = "Error resolving"
            errcountMX += 1

        list = [url, MX, A]
        print(list)
        listoflists.append(list)

with open('output.csv', 'wb') as csvfile: ##write the csv file
    writer = csv.writer(csvfile)
    for r in listoflists:
        writer.writerow(r)

print listoflists
print ("There were %e A record errors") %errcountA
print ("There were %f MX record errors") %errcountMX
print ("Done!")

---

请包含错误消息的全文。我正在尝试：（愚蠢的新手在这里。明白了；-）我必须用4个空格缩进代码请包含错误消息的全文。我正在尝试：（愚蠢的新手在这里。明白了；-）我不得不用4空格缩进代码。请原谅，但当我运行代码时，我仍然得到相同的错误：dns.resolver.noanswero我想我把它删掉了2倍。。。站在byRob旁边，我有一条新的错误消息：对于数据中的url:url=url.strip（）dns.resolver.query（url，“MX”）对于答案中的rdata:x=[rdata.exchange，rdata.preference]打印（x）列表。追加（[x]）回溯（最近一次调用）：文件“”，AttributeError:GenericRData对象中的第5行没有属性“exchange”。嘿，Rob，我认为一些URL无法解析，然后程序结束。感谢你的帮助，我写了以下（成功的）脚本！导入dns导入dns.resolver导入操作系统导入csv列表=[]，打开（“domains.txt”）作为f:for-url-in-f:url=url.strip（）打印url-try:answers=dns.resolver.query（url，'A'）for-rdata-in-answers:print-rdata.address-list.append（rdata.address）除了：print（“err”）list.append（“err”）continue print list Rob原谅我，但是当我运行代码时，我仍然得到相同的错误：dns.resolver.noanswero我想我把它剥离了两倍。。。站在byRob旁边，我有一条新的错误消息：对于数据中的url:url=url.strip（）dns.resolver.query（url，“MX”）对于答案中的rdata:x=[rdata.exchange，rdata.preference]打印（x）列表。追加（[x]）回溯（最近一次调用）：文件“”，AttributeError:GenericRData对象中的第5行没有属性“exchange”。嘿，Rob，我认为一些URL无法解析，然后程序结束。感谢你的帮助，我写了以下（成功的）脚本！导入dns导入dns.resolver导入操作系统导入csv列表=[]，打开（“domains.txt”）作为f:for-url-in-f:url=url.strip（）打印url-try:answers=dns.resolver.query（url，'A'）for-rdata-in-answers:print-rdata.address-list.append（rdata.address）除了：打印（“错误”）列表。附加（“错误”）继续打印列表

with open("domaints.txt") as f:
    for url in f:
        url = url.strip()
        answers = dns.resolver.query(url, 'MX')
        # Continue as before