Make script more Pythonic

6to4_converter.py

@@ -1,16 +1,21 @@
+#!/usr/bin/env python3
+
+
+def get_ipv4_from_user():
+    user_in = input("Enter IPv4 address: ")
+    return user_in
+
+
+def ipv4_to_ipv6(ipv4):
     ipv4Hex = ''
     ipv6Hextet1 = '2002'
     ipv6Hextet2 = ''
     ipv6Hextet3 = ''
 
-#take input
-print('Enter IPv4 address:')
-ipv4 = input()
-
-#split input to octets
+    # Split input to octets
     ipv4 = ipv4.split('.',4)
 
-#convert IPv4 address to hex string
+    # Convert IPv4 address to hex string
     for octet in ipv4:
         if len(hex(int(octet))[2:])>1:
             ipv4Hex += hex(int(octet))[2:]
@@ -18,7 +23,7 @@ for octet in ipv4:
             ipv4Hex += '0'
             ipv4Hex += hex(int(octet))[2:]
 
-#split into hextets
+    # Split into hextets
     for i in range(4):
         ipv6Hextet2 += (ipv4Hex[i])
     for i in range(4,8):
@@ -28,5 +33,13 @@ for i in range(4,8):
     ipv6Hextet2 = hex(int(ipv6Hextet2,16))[2:]
     ipv6Hextet3 = hex(int(ipv6Hextet3,16))[2:]
 
-#form and print 6to4 address
-print(ipv6Hextet1+':'+ipv6Hextet2+':'+ipv6Hextet3+'::/128')
+    # Form 6to4 address
+    output_6to4 = f"{ipv6Hextet1}:{ipv6Hextet2}:{ipv6Hextet3}::/128"
+    return output_6to4
+
+
+def main():
+    ipv4 = get_ipv4_from_user()
+    output = ipv4_to_ipv6(ipv4)
+    print(output)
+