Aya Jafar

main.py

@@ -1,6 +1,82 @@
+import re
+
 def solution():
-    pass
+    while True:
+        ip = input('Enter an IP address in the format #.#.#.#/# :\n')
+        if is_valid(ip):
+            ip_octets = split_ip(ip)
+            ip_octets = [int(i) for i in ip_octets]
+            ip_class = find_class(ip_octets[0])
+            ip_designation = find_designation(ip_octets)
+            print(f'Class: {ip_class}, Designation: {ip_designation}')
+            break
+        else:
+            print('Please try again...\n')
+            continue
+
+
+def is_valid(str_ip):
+    pattern = re.compile("^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/\d{1,2}")
+    checker = pattern.match(str_ip)
+
+    if not checker:
+        print('The IP address does not match the required format')
+        return False
+
+    ip = split_ip(str_ip)
+
+    for i in ip:
+        if (int(i) not in range(0, 256)):
+            print('All ocetets should be in range 0-255')
+            return False
+
+        if len(i) > len(i.lstrip('0')) and len(i) != 1:
+            print('Leading zeros in any octet are not allowed')  # 01 or 001
+            return False
+
+    cidr_index = str_ip.find('/')+1
+    if int(str_ip[cidr_index:]) not in range(0, 33):
+        print('CIDR notation should be between 0-32')
+        return False
+
+    return True
+
+
+def split_ip(str_ip):
+    ip_octets = str_ip.split('/')[0].split('.')
+    return ip_octets
+
+
+def find_class(first_octete):
+    if first_octete in range(1, 128):
+        return 'A'
+    if first_octete in range(128, 192):
+        return 'B'
+    if first_octete in range(192, 224):
+        return 'C'
+    if first_octete in range(224, 240):
+        return 'D'
+    if first_octete in range(240, 256):
+        return 'E'
+
+
+def find_designation(ip_octets):
+    if any ([
+        ip_octets[0] == 10 ,
+        ip_octets[0] == 169 and ip_octets[1] == 254 ,
+        ip_octets[0] == 172 and ip_octets[1] in range(16, 32) ,
+        ip_octets[0] == 192 and ip_octets[1] == 168
+    ]):
+        return 'Private'
+
+    elif (
+        ip_octets[0] == 127
+    ):
+        return 'Special'
+
+    else:
+        return 'Public'
 
 
 if __name__ == '__main__':
-    pass
+    solution()