Python check ip address valid

Python check ip address valid. Mar 16, 2023 · If the string is not a keyword, continue to the next step. (_ssl. Approach. For a basic validation this oneliner could help. An address is valid if and only if it is in the form "X. 10. This module provides a class called IPv4Address and IPv6Address which can be used to validate IPv4 and IPv6 addresses respectively. Now you have a list of integers in slice_split_address and so it'll check if every element of that list evaluates to True if you just call it like you do and any number other than 0 will evaluate to True, but an IP like 127. I like to be able to verify if the end user has key in a valid IP address. proxy_user = "<USERNAME>". 78. Python provides ipaddress module which provides the capabilities to create, manipulate and operate on IPv4 and IPv6 addresses and networks. 64 , 255. Check if the resulting segments form a valid IP address. only). """. ip_address() will not validate an IP Address with the CIDR notation, even if it’s /32. It can be used to check if a given IP address is valid by using the ip_address function and catching any exceptions that may be thrown. Output : Given IP address belongs to Class B. e. Validate an IP address (IPv4). ip_address('199. 151. IP (Internet Protocol) -Address is the basic fundamental concept of computer networks which provides the address assigning capabilities to a network. there are two separate concerns, and both are valid concerns: (1)°argue whether a given string can serve, technically and plausibly, as a, say, valid email address, hostname, such things; (2)°demonstrate that a given name is taken, or likely free. You can do this by importing and using the python IPv4 addresses are also validated. Returning 0/1 is very 'unpythonic' instead of True/False. ValidHostnameRegex is valid as per RFC 1123. The dataframe A contains IP addresses only and the other one has IP addresses or IP addresses with a CIDR. I searched online, and all the examples are too complex to under May 4, 2009 · Given an ip address (say 192. 355. If you want to loop through a network you can define a network using ipaddress module. Any tips on printing the inverse, or IP Dec 21, 2013 · Stack Overflow Jobs powered by Indeed: A job site that puts thousands of tech jobs at your fingertips (U. When we start to check the bits, we need the first digit to be 1. 0/24') import ipaddress for ip in ipaddress. So in the script I want to add this mac address check before runs the script. 255. Simple example I have tried: import socket. As soon as we encounter a 0 however, we can only accept zeros for the remaining bits. 5. I also wrote several tests with the expected output, and they all passed as expected. In this tutorial, you’ll learn: How IP addresses work, both in theory and in Python code. In this example, we will use the ipaddress. 32 , 0. ){3}[0-9]{1,3}$. Here’s a simple example: import socket. I need to parse valid and unique ip address from a text file. SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: IP address mismatch, certificate is not valid for ‘XXX. c Jul 14, 2015 · I want to add Mac address (Validation) check before my python script runs. Sep 21, 2021 · When connected to the web, the IP address allows the computers to send and receive information. Installing via pip: pip install iptools Apr 11, 2024 · Validate an IP Using Python and Regex. If you want the URL validator to also work with IPv6 addresses, do the following: Add is_valid_ipv6(ip) from Markus Jarderot's answer, which has a really good IPv6 validator regex; Add and not is_valid_ipv6(domain) to the last if; Examples Sep 23, 2013 · Per How to validate IP address in Python? it seems that there are two methods two accomplish this, REGEX or socket. ip_address() factory function, which automatically determines whether to create an IPv4 or IPv6 address based on the passed in value: I hate programs that force the user to think a like a computer. Any suggestions? Aug 7, 2023 · Before you geolocate a user's device via an IP address using Python, you should make sure it is a valid IP address. – Niklas B. Jan 10, 2014 · Here is a python regex that does a pretty good job of fetching valid IPv4 IP addresses from a string: import re reValidIPv4 = re. 168. If the ipaddress module is not installed, then you can install it using command, Copy to clipboard. So my script wanna be like this after. Input an IPv4 address or a subnet into the terminal, and the ping sweeper should get to work and return the expected output. I have assumed that IP address is in decimal format. Input : 130. Either I want to use the IP address they entered (check to see if it's valid first), lookup the IP with the FQDN, or get the FQDN using the hostname (using local DNS settings). Feb 6, 2015 · What i want to do is check if an IP falls into that range. inet_aton("string") converts the string to ip address,if this is not valid ip then it will throw exception. That's gotta be a huge regex, at least if it matches every valid hostname and rejects every invalid one. except socket. 0 to 255. Basic usage: from validate_email import validate_email. The functions and classes in this module make it straightforward to handle various tasks related to IP addresses, including checking whether or not two hosts are on the same subnet, iterating over all Oct 26, 2016 · As said in the documentation of all, it checks if every element in a list evaluates to True (basically bool(e) is True) or it is empty. We will start our code by accepting the input Introduction to IP Address Regular Expression. Oct 3, 2008 · A more fundamental problem here is that in a properly written modern networking program the right (set of) local IP address(es) depends on the peer, or the set of potential peers. py-. ',re. This module comes inbuilt with python 3. 8. 30. The simplest way to create addresses is to use the ipaddress. inet_aton(stringVariable) except socket. In this tutorial, you’ll get a better grasp of IP addresses by using some of the features of Python’s ipaddress module. is_private) # Checks if address is private. IPv6Network() method from the ipaddress module to validate whether an IPv6 IP address is valid or not. – Dec 24, 2012 · I would import the IPAddresses and Data classes, then use them to accomplish your task in the following manner: #!/usr/bin/env/python. And would like to get some code review. 179. 0/24' ip2 = '10. AF_INET6, ip) except socket. I don't need to get the TTL=64 or those data to check the connection of ip address. Mar 27, 2009 · I find this in cuckoo. Downloading Files from My Web server. Everything worked well until I decided to implement SSL/TLS. ip_network(ip1). keyword = 'foo'. Jun 1, 2010 · Many of the solutions mentioned here require an exec out to a command line utility. As we know, for class A first octet will range from 1 – 126, for class B first octet will range from 128 – 191, for I am trying to make a raw HTTP request in Python and write the response to a file. 3+. 255 I am 255. For IPv4 addresses, which are the most commonly used, validation is relatively straightforward. 0. This normally results from an attempt to bind to an address that is not valid for the local computer. We remove dots in the input string and after that check if we can convert the result to an integer or we get an exception. 1. Another way to check is if you also have the public key of the ethereum address. Python provides ipaddress module which is used to validate and categorize the IP address according to their types (IPv4 or IPv6). proxy_port = "<PORT>". PYTHON IP CHECKER. Jun 11, 2023 · Check if String is a valid IP using Iptools. split('. Get IP address of your computer in Python Here we are trying to fetch the IP address of our computer in Python using various methods like, Jul 31, 2023 · Examples: Validate an IP address using Python without using RegEx. socket. error: Mar 8, 2019 · IP Host Addresses¶ Addresses, often referred to as “host addresses” are the most basic unit when working with IP addressing. Python has several options for doing this, which we won't get into here. append Aug 26, 2020 · 4. ip_network(ip2). 266 I am not repeat 8. Here is an example code to check if an IP address is valid in Python: There exists a python library called py3-validate-email validate_email which has 3 levels of email validation, including asking a valid SMTP server if the email address is valid (without sending an email). That's might be something not what you expect. 1 is actually valid. prefixlen) Jun 2, 2021 · @Michael I know this is much later than original post, but I have a problem perhaps you could provide context to. 3 ping not working 8. inet_aton() to parse a CSV and check the field if it is an IPv4 address. You can check if the IP is valid using the RFCs for IPv4 and IPv6 but you can never discard a hostname because xyz can be reachable within you LAN and not from the internet. 1') print(ipa. Otherwise, tokenize the string, S with respect Mar 12, 2020 · It’s very straightforward to validate built-in types in Python, but an IP address is just a string in Python - and any string is a valid string. If the value of cnt is not equal to 3, then update the value of ans to false. 6 and Windows Server 2008. def check_ip_address( ip): try: ipaddress. ') == 3. error: [E Apr 3, 2017 · I'm trying to create a Python (2. Jan 20, 2020 · Install the netaddr module using pip and then import it. Mar 11, 2015 · If you are allowed to not to use regex, you can use python's socket package . Regex is for pattern matching, but to check for a valid IP, you need to check for the range (i. X", where each X is a number from 0 to 255. 0. 3, you can use this backport. Jun 28, 2022 · Problem Statement: Write a Python program to validate if the given string is a valid IP address or not. Although not as feature-rich as GeoIP2, it provides basic functionality for resolving IP addresses to country/city with minimal setup. 456. If you want to evaluate a lot of IP addresses this way, you'll probably want to calculate the netmask upfront, like Feb 19, 2024 · Solution 3: Using Python GeoIP Library. Here's a Python function to generate all valid IP addresses: def restore_ip_addresses (s): def backtrack (path, start): # Base case: if we've placed all 3 dots if len (path) == 4: if start == len (s): ips. Firstly I think you have a concept problem: check whether the given input is a valid Hostname or valid IP or none of them either. tech Apr 22, 2023 · The ipaddress module in Python provides classes for working with IP addresses and networks. Method will return the True or False. 3+, so you don’t need to install it if you have python 3. For ip='123. But looks like it is NOT giving me correct result. The IP address should be of the format ( X. You can use socket. Usage: Jun 3, 2015 · 2. Just import two built-in modules: socket and struct. Sep 23, 2020 · Here are some examples to validate whether the IPv4 IP address is valid or not. // strTokenFunction. One of the visual differences between IP and domain address is when you delete dots in the IP address the result would be a number. Jul 31, 2020 · I'm new to Python, and would like help for my code below. But i wan't to do this by hand. """Extract IPv4 Addresses From Input File. Method #1: Checking the number of periods using count () method and then the range of numbers between each period. ipa = ipaddress. gethostname () function to get an IP from a URL in Python. Jan 13, 2017 · I want to check if IP 180. 88. group(0))]. Basic IP functions. Now, even though I have a certificate that is using the correct IP address, and is self-signed, I get this error: ssl. pip install ipaddress. . compile(r""" # Match a valid IPv4 in the wild. 77. IPv4Address(val) instead. So, I am able to prompt the user for their IP address and check whether it is valid or not, but I cannot seem to figure out how to get this program to ask the user for another IP address if the one entered is invalid. proxy_ip = "<IP>". And use function below. I've found an interesting method using socket module here it is: # test for IPv4. If the string is not a valid identifier, print “Invalid Identifier”. Feb 8, 2023 · Host ID is 4. thank you for your help and idea. Examples:- 12. That may be an IP address that your router is listening to before using NAT (network address translation) to talk to your computer, but that doesn't mean your computer sees that IP address at Dec 31, 2020 · 1. Please give me your thoughts on this. 1), how do I check if it's in a network (say 192. split('\. . Validating IP addresses in Python is essential for applications related to networking, cybersecurity, and data processing. 1', port=8080) but it always says the port is not open. ip_address('${IP_ADDR}')" 2>/dev/null; then echo "IP_ADDR is a valid IPv4 or IPv6 address" else echo "IP_ADDR is not a valid IPv4 or IPv6 address" fi Python program to check if a string is a valid IP address or not. Store the count of occurrence of ‘. 3. Aug 18, 2021 · Working with IP Addresses in Python. count(True)==4 Example: 3 days ago · Source code: Lib/ipaddress. It would be some extremely specific code that could even tell them apart as 1 == True, 0 == False, True + True == 2, and sum (n % 2 == 0 for n in range (1000)) == 500. count('. To install. AF_QIPCRTR is a Linux-only socket based interface for communicating with services running on co-processors in Qualcomm platforms. Jul 10, 2017 · I am using python and would like a simple regex to check for a domain name's validity. It needs to return a false value if the string is not just an ip address, but an ip address followed by some sort of path. 44 falls in there, which it would, or that 10. Building your own custom Regex to check the shape of the provided IP string is fairly straightforward in Python. If the string is a valid identifier, print “Valid Identifier”. There is no need to install new modules. Such as ipaddress. with self. IsIPv4Address is another function of mine (EDIT 1: added it into the question). 6 ip address I am repeat 3. 1 Code: In Python, we can check if an IP address is valid using the ipaddress module. Python's re module can be used to create regex patterns for both IPv4 and IPv6 address validation. i do not agree. match(r'^\d+\. If the local IP address is needed to hand it over to a peer Oct 5, 2014 · 3. I wrote a function which will compare every IP octet with the others. Let’s take a look at how we can verify which addresses are loopback, multicast, local links, or reserved using the ipaddress module in Python. For example, use the following pattern to match an IP: Aug 25, 2020 · [edit] My apologies, I got confused in my original answer. from IPAddresses import ExtractIPs # Extract IPs From Input Data. We can use the. In Computer Network, the IP address uniquely defines each host or node in the network. 2. 0 - 180. AF_INET, ip) try: # test for IPv6. May 15, 2014 · The easiest way to check if it's any kind of IP address (IPv4 or IPv6) is with a python one-liner: #!/bin/bash IP_ADDR="::1" if python3 -c "import ipaddress; ipaddress. python3 sweeper. 355 I am valid 192. If the local IP address is needed to bind a socket to a particular interface, then it is a policy matter. In this example, we are not using any python library to validate an IPv4 IP address is valid or not using python. 100. IPv4Network('192. This method requires you to check that the string is the right shape and that the values in each section are between 0 and 255. ip_network('192. 0/24'): print(ip) Apr 29, 2020 · Validate IP Address in Python - Suppose we have a string; we have to check whether the given input is a valid IPv4 address or IPv6 address or neither. Jan 11, 2011 · I'm using Python 2. ip_address ( ip) if ":" in ip: return "IPv6" else: return "IPv4" except ValueError: return "Invalid". you can use ip-getter website to get the IP by which you are sending a request, then check if the IP is the same as your proxy IP or some thing else. Here we will mostly talk about the usage for validating if the IP is valid IPv4 or IPv6. from Data import CleanData # Format and Clean the Input Data. X) Each X represents a number within an inclusive range of 0 to 255. 45. We can use the ipaddress module in Python, to verify if a string is a valid IP or not. 111. Here is an example. Depending on the language you use \ could have to be escaped with \. l = list(map(str, s. proxies = {. sample file to be parsed: ping working 3. assertRaises(ValueError): check_keyword(url, keyword) I try unit testing on url textfield and there is main. 0 I am 111. inet_aton(). Related: An in-depth look at validating IP addresses with Python . Get Mac Adress from my Android Device. I need Python to use the external IP address, but while doing so I get this: socket. Apr 17, 2012 at 12:42. Here’s how: import socket try: socket. 192. Network ID is 130. subnets(new_prefix=ipaddress. 22' ipaddress. About the error: [Errno 10049] The requested address is not valid in its context This normally stems from an attempt to bind to an address that is not valid for the local computer: so it seems that the loopback address 127. IPv6 Support. Apr 10, 2012 · The following will check whether an IP is valid or not: If the IP is within 0. XX’. 1. Checking if a string is a valid IP address format in JavaScript involves verifying if the string follows the rules for a standard IPv4 or IPv6 address. The iptools library is a tool that offers IP address manipulation and validation features. py. py page where I done the validation main. Aug 11, 2022 · when I tried to print the result= ping(ip_addr), I saw a false/ truenow I get it. My script have this right now. S. 0/16') True If your Python installation is older than 3. \d+$',your_ip). Mar 22, 2024 · IP addresses are usually written and displayed in human-readable notation such as 192. The first expression will match exactly one lowercase Oct 11, 2012 · For some reason, the ipaddress module does not provide a simple function to check whether a network is contained in another network. XXX. import ipaddress. fromnetaddrimport*. Apr 17, 2012 · 101 1 4 12. 1 it is not configured on your machine. See full list on codefather. Python has a built-in socket module that provides a straightforward method to resolve hostnames to IP addresses. ValidIpAddressRegex matches valid IP addresses and ValidHostnameRegex valid host names. Apr 14, 2022 · Asking the user for input until they give a valid response (22 answers) Closed 2 years ago . ip_network() instead. python -m pip install py3-validate-email. 255, then the output will be true, otherwise it will be false: [0<=int(x)<256 for x in re. url = 'https://stackoverflow'. The IPv4 addresses are canonically represented in dotted-decimal notation, which consists of four decimal numbers, each ranging from 0 to 255, separated by dots (. Here is the source code of the program to validate the IPv6 IP address. Aug 23, 2022 · Fire up a terminal, move into the location of the script and execute it with python3: cd /directory/sweeper/. Strip the separator, whatever it is, then get the hex value that's left. def _is_private_ip(self, ip): """Check if the IP belongs to private network blocks. I wrote the following Mar 27, 2023 · Follow the steps below to check if the string is IPv4: Initialize a boolean variable, ans as true to check if the string is IPv4 or not. The address family is represented as a (node, port) tuple where the node and port are non-negative integers. 35 in IPv4(32-bit IP address). However, before we proceed, let's install the library. These are the methods to check if a string is a valid IP address format in JavaScript: Place three dots in the string at different positions. We will use the valid_ipv4 and valid_ipv6 methods to validate if given element is valid IPv4 or IPv6 address or not. Something like this is what I have been doing so far: Apr 11, 2017 · 7. X. Example 1: Without Using Any Python Library. 3+, you can use ipaddress module: >>> import ipaddress >>> ipaddress. Oct 30, 2023 · There are two common formats for IP addresses: IPv4 and IPv6. Write a Python program to validate an IP address. The GeoIP library is another way to perform IP-based geolocation in Python. It doesn't matter if the address is a valid IP or Dec 7, 2018 · I've written a small Python function to check whether a string is a valid IPv4 subnet mask. 200. # Group two start-of-IP assertions. Others mention some older python ping modules. I specifically Aug 3, 2022 · import socket hostname = input ("Please enter website address:") # IP lookup from hostname print (f'The {hostname} IP Address is {socket. Aug 3, 2022 · As you can read in the code comments, ipaddress. 111 I am not valid 355. Get IP from URL Python using the socket module. Range Specifications Specifying a range of characters or literals is one of the simplest criteria used in a regex. Match ip address using Nov 27, 2015 · I have the following task: Identify if the string has a valid IPv4 or IPv6 address using just the default modules. You can read mode about IP address in Computer Networking. I tried your solution using (host='127. The Ethereum Foundation's official eth-keys Python library can be used, and is now part of their Github repo and can be seen here and contains a suite of tools that include ways to check address validity, such as using the PublicKey(). Jun 24, 2023 · I’m trying to create a simple messenger in Python. Sep 23, 2020 · Example 1: Using ipaddress Module. The ipaddress module allows you to do just that by viewing and manipulating IP addresses as Python objects. [bool]("text" -as [ipaddress]) But user may type something like "100" and it will successfully validate to ip address 0. The script will find the IP address and print it. ip_network(ip2) in ipaddress. 138. I would recommend resolving a host name into a IP address by using some of pythons built in functionality. 3. May 9, 2018 · Aside the UDP addresses setting there are not any problems on python side. But since IPv6 can have many formats, I am not able to find the exact solution. 888 ping working 5. I know there are many python libraries that currently do this such as ipcalc and netaddr. cpp : Check if the specified address is a valid numeric IP address. inet_pton(socket. Mar 27, 2019 · Validate IP Address. library to check whether the string is a valid IP address. Mar 9, 2018 · Please let me know how to print all IP Addresses in Python. Feb 15, 2016 · 1. g. Then we can accept as many ones as possible. Implementation. Python provides a library called re for parsing and matching Regex. error: print "That was not a valid IP address" You can use the following regular expressions separately or by combining them in a joint OR expression. I think you're better off checking for basic patter and then check for the range for each number. So based on this difference we can check if the input string is an IP or a domain address. error: Jan 6, 2022 · Check If a String is a valid IP Address using ipaddress module. This is quite inefficient and resource hungry if you need to monitor large numbers of IP addresses. Just do: (regexIPv4)|(regexIPv6) – Bart Kiers. def get_ip_address(url): try: Im basically grabbing input from a end user, and then I want to use an if statement basically stating so long as its either a valid IPV4 IP or a valid IPV4 CIDR then go do some tasks, then ill do some else statements that print out some verbiage about not meeting the address or network requirements. ipaddress provides the capabilities to create, manipulate and operate on IPv4 and IPv6 addresses and networks. From Wikipedia, An Internet Protocol address (IP address) is a numerical label assigned to each device connected to a computer network that uses the Internet Protocol for communication. Jun 28, 2018 · With Pyspark, I would like to join/merge if an IP address in the dataframe A is in a IP network range or hits the same IP address in the dataframe B. Below is an attempt to use socket. A typical regex pattern for IPv4 might be ^(?:[0-9]{1,3}\\. When I try to bind to the resolved IP Address or domain of the host I get this: Traceback (most recent call last) Aug 16, 2016 · The requested address is not valid in its context. There are mere 2 logics that i am using as shown in code-The length of ipnos should be 4 after the split('. Install the Python GeoIP library with pip install python-geoip. I managed to solve this problem as follows: ip1 = '10. It works but maybe it's too convoluted and terse? Or maybe it could be improved / optimised / rewritten in a cleverer way than just to check 1's in a string?. def check_valid(address): try: socket. \d+\. If you only want to accept IPv4 addresses, use return ipaddress. ') The strings should be numbers only. Host ID is 151. ip_address('192. Make it more friendly by accepting any valid format. Nov 8, 2021 · I'm confused on how I could prompt the user for an IP, FQDN, or hostname. 4b. proxy_pass = "<PASSWORD>". 254 , etc. I check at least write domain name. Apr 23, 2018 · While trying to learn Python I stumbled upon a question which asks you to write a code that is able to take an input and verify it to see whether it meets the IPv6 Criteria. The server has two IP addresses 1 internal, 1 external. i) [a-z] ii) [A-Za-z0-9] In the above expression ([]) square brackets are used to specify the range. Here is the aproach that combines the above two answers. We will use the socket. 40", e. Oct 19, 2023 · In this example we are passing the string as the input argument to the ip_address () function and checks if the given input ip address is valid or not. 09' : It should result True but it returning False Aug 26, 2023 · The validation process involves checking whether an IP address adheres to the established rules and conventions of its respective IP version, whether it is IPv4 or IPv6. 11 lies between a particular range, say 180. I there have a database online. Dec 20, 2012 · IP Address validation in python; Validating IP Addresses in python; I would like to ask why you are communicating with a subprocess when you can do this within the standard python library. You may use regex to check for range, but that'll be a bit overkill. Jul 30, 2016 · For example, I have a bunch of strings and want to check each one to see if they are a valid IP address (valid in this case meaning correct format), is the fastest way to do this using regex? Or is there something faster with like string formatting or something. 0/24) in Python? Are there general tools in Python for ip address manipulation? Stuff like host lookups, ip adddress to int, network address with netmask to int and so on? Hopefully in the standard Python library for 2. Nov 26, 2008 · Here is the C program to validate a given IPV4 address. ), For example, 1 Availability: Linux >= 2. a dotted quad, and IPv6 addresses in both longhand form (8 groups of 4 hexadecimal characters separated by :) and shorthand forms. Oct 30, 2023 · Python Basic: Exercise-139 with Solution. For determining the class: The idea is to check the first octet of the IP addresses. We need a way to ensure that it’s a valid IP address. So i want to be able to see if 10. Mar 15, 2012 · In Python 3. 10') in ipaddress. ip_checker is a python library which you can use to validate ip address and check whether an ip is private or public & you can easily implement this library easily on your api, app or This library works on both python2 & python 3. Availability: Linux >= 4. Firstly let’s know what a valid IP address looks like. This is one of the questions asked in the Juniper coding interview. 0 <= n <= 255). checksum_address() method Mar 20, 2013 · which will accept IPv4 addresses of the form "100. 7) function that will take a string and return true if its input is an ip address, possibly with a slash in the end, but false otherwise. 55. ’ in the given string, S in a variable cnt. Each octet in the address must be a number between 0 and 255, separated by periods. You should strip the /32 or use ipaddress. Feb 21, 2024 · 1. 90 does not. Currently it prints the garbage or not properly formatted IP addresses. Here is the source of the code of the program to validate whether an IPv4 IP address is Valid or not. Apr 18, 2019 · I need to do this as part of validation, I have a solution for IPv4. inet_aton(address) return address. gethostbyname (hostname)} ') Python Get Ip Address from Hostname. Update 1: As suggested by Rahul, I've tried the following code but it didn't return anything on the screen. 154. 3 invalid 0. 99. Search jobs Feb 10, 2022 · I am trying to validate if the string of numbers is valid IP address or not. Here is a script for that matter: import requests. gethostbyname () for this: Your function might look like this: Example: Feb 15, 2023 · Regex (Regular Expression) In C++ will be used to check the IP address. 43. Here is another example to pass the hostname as a command-line argument to the script. End of the function. Check whether the input string is a valid Python identifier using the isidentifier () method: 4a. I got this problem during an interview. 7. '))) Method #2: Using a variable to check the number of periods and using a set to check if the range of numbers between periods is Mar 28, 2011 · how can one check if variable contains DNS name or IP address in python ? python; regex; dns; ip; Regexp to check if an IP is valid. ox is ui fb rb sj mh bx ds en