How do I check if a string is a valid IP address in Python using the ipaddress module and regex?
Davide S

To check if a string is a valid IP address in Python using theipaddress module and regular expressions, you can follow these steps: 1. Import the necessary modules: - Import theipaddress module for IP address validation. - Import there module for regular expressions. - Example:

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import ipaddress
import re

2. Check the string with regular expressions: - Create a regular expression pattern that matches valid IP addresses. - Use there.match() function to check if the string matches the pattern. - The pattern should match the four groups of numbers separated by periods, where each group is a number between 0 and 255. - Example:

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def is_valid_ip_address(ip):
    pattern = r'^(\d{1,3}\.){3}\d{1,3}$'
    return bool(re.match(pattern, ip))

3. Use theipaddress module for validation: - Create a try-except block to handle exceptions raised by theipaddress module. - Use theipaddress.ip_address() function to validate the IP address. - If the IP address is valid, the function will not raise an exception. - Example:

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def is_valid_ip_address(ip):
    pattern = r'^(\d{1,3}\.){3}\d{1,3}$'
    if re.match(pattern, ip):
   try:
  ipaddress.ip_address(ip)
  return True
   except ValueError:
  return False
    return False

4. Use the function: - Call theis_valid_ip_address() function and pass the string you want to validate as an IP address. - It will returnTrue if the string is a valid IP address, andFalse otherwise. - Example:

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ip = "192.168.0.1"
if is_valid_ip_address(ip):
    print("Valid IP address")
else:
    print("Invalid IP address")

By using regular expressions to perform a basic pattern match and theipaddress module for additional validation, you can efficiently check if a string is a valid IP address. This approach allows you to combine the flexibility of regular expressions with the built-in IP address validation capabilities provided by theipaddress module.

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