regular expression for ipaddress and mac address

Question

can anyone suggest me the regular expression for ip address and mac address ?

i am using python & django

for example , http://[ipaddress]/SaveData/127.0.

Answer 1

I need to mac address validation and I have to accept mac address without separator and with colon and dash separators. So valid formats like this

• aa:bb:cc:dd:ee:ff
• aa-bb-cc-dd-ee-ff
• aabbccddeeff

and mixed separators are invalid like this

• aa:bb-cc-dd:ee:ff

and the validation code with regex like this.

def validate_mac_address(mac_addr):
    pattern = '^(([0-9a-fA-F]{2}[:]){5}([0-9a-fA-F]{2})|([0-9a-fA-F]{2}[-]){5}([0-9a-fA-F]{2})|[0-9a-fA-F]{12})$'
    return not re.match(pattern, mac_addr) is None