mirror of
https://github.com/TheAlgorithms/Python.git
synced 2025-02-22 01:02:04 +00:00
80 lines
1.6 KiB
Python
80 lines
1.6 KiB
Python
"""
|
|
wiki: https://en.wikipedia.org/wiki/IPv4
|
|
|
|
Is IP v4 address valid?
|
|
A valid IP address must be four numbers in the form of A.B.C.D,
|
|
where A,B,C and D are numbers from 0-255
|
|
|
|
for example:
|
|
192.168.23.1, 172.254.254.254 are valid IP address
|
|
192.168.01.0, 256.192.3.121 are invalid IP address
|
|
"""
|
|
|
|
|
|
def is_ip_v4_address_valid(ip: str) -> bool:
|
|
"""
|
|
print "Valid IP address" If IP is valid.
|
|
or
|
|
print "Invalid IP address" If IP is invalid.
|
|
|
|
>>> is_ip_v4_address_valid("192.168.0.23")
|
|
True
|
|
|
|
>>> is_ip_v4_address_valid("192.255.15.8")
|
|
True
|
|
|
|
>>> is_ip_v4_address_valid("172.100.0.8")
|
|
True
|
|
|
|
>>> is_ip_v4_address_valid("0.0.0.0")
|
|
True
|
|
|
|
>>> is_ip_v4_address_valid("254.256.0.255")
|
|
False
|
|
|
|
>>> is_ip_v4_address_valid("1.2.33333333.4")
|
|
False
|
|
|
|
>>> is_ip_v4_address_valid("1.2.-3.4")
|
|
False
|
|
|
|
>>> is_ip_v4_address_valid("1.2.3")
|
|
False
|
|
|
|
>>> is_ip_v4_address_valid("1.2.3.4.5")
|
|
False
|
|
|
|
>>> is_ip_v4_address_valid("1.2.A.4")
|
|
False
|
|
|
|
>>> is_ip_v4_address_valid("1.2.3.05")
|
|
False
|
|
"""
|
|
|
|
parts = ip.split(".")
|
|
|
|
if len(parts) != 4:
|
|
return False
|
|
|
|
for part in parts:
|
|
if not part:
|
|
return False
|
|
|
|
for i in range(len(part)):
|
|
if not part[i].isdigit():
|
|
return False
|
|
|
|
if part[0] == "0" and len(part) > 1:
|
|
return False
|
|
|
|
if not (0 <= int(part) <= 255):
|
|
return False
|
|
|
|
return True
|
|
|
|
|
|
if __name__ == "__main__":
|
|
ip = input().strip()
|
|
result = "valid" if is_ip_v4_address_valid(ip) else "invalid"
|
|
print(f"{ip} is a {result} IPv4 address.")
|