Question

What's wrong with my Python code. We have to find the regularexpression in Python My output should look like this

My IP address 128. 0. 0. 1

My IP address 53. 20. 62. 201

My code

ipAddresses = []

ipRegEx = re.compile(r"\d{1,3}.\d{1,3}.\d{1,3}.\d{1,3}")

   result = myRegEx.find all(Search Text)

   def Regular_expression(ipAddresses)

      for i in ipAddresses:

         print(i)

ipSearchResult = ipRegEx.search(line)

   if ipSearchResult != None and ipSearchResult.group() not in ipAddresses:

      ipAddresses.append(ipSearchResult.group())

we have to use loop too.

Answer 1

This modified code will fetch the IP addresses.
The module “re” should be imported to handle the regular expression.
The module “socket” should be imported to find the IP Addresses

The statement “ipAddresses = socket.gethostbyname_ex(socket.gethostname())” fetches all the active IP addresses and assign it to the variable.
The loop iterates through all the ip addresses fetched.
There may be some blank entries fetched depending on whether you are connected to the Internet, having multiple NIC cards etc. If blank, do not proceed and continue with the next iteration of the loop. The statement “if(len(ipAddress) > 0)” handles that.
The regular expression then checks if it is a matching pattern of IP address and if so, will proceed in printing that.

Code

import re #This should be imported to use the regular expression
import socket #This should be imported to find the IP Addresses

def getIPAddresses():
ipAddresses = socket.gethostbyname_ex(socket.gethostname()) #This statement will fetch all the ip addresses and assign it to the variable
  
for ipAddress in ipAddresses: #This loop will loop through the fetched ip addresses.
if(len(ipAddress) > 0): #There may be some blank entries fetched depending on whether you are connected to the Internet, having multiple NIC cards etc. If blank, do not proceed and continue with the next iteration of the loop.
ipAddressString = ipAddress[0] #The variable "ipAddress" is a list and take the 1st entry from that.
if(re.search("\d{1,3}.\d{1,3}.\d{1,3}.\d{1,3}", ipAddressString)): #Apply a regular expression and check if it is an ip address. If so, proceed in printing that.
print ("My IP address " + ipAddressString)

getIPAddresses()