Fix lint errors in CI #2

app/main.py

@@ -6,41 +6,45 @@ import argparse
 
 
 def parse_args():  # pragma: no cover
-    parser = argparse.ArgumentParser(description='Get 6to4 address from IPv4 address.')
-    parser.add_argument('-a', '--address', dest='address', action='store', help='IPv4 address', required=True)
-    args = parser.parse_args()
-    return args
+    parser = argparse.ArgumentParser(description="Get 6to4 address from IPv4 address.")
+    parser.add_argument(
+        "-a",
+        "--address",
+        dest="address",
+        action="store",
+        help="IPv4 address",
+        required=True,
+    )
+    return parser.parse_args()
 
 
 def ipv4_to_ipv6(ipv4):
-    ipv4Hex = ''
-    ipv6Hextet1 = '2002'
-    ipv6Hextet2 = ''
-    ipv6Hextet3 = ''
+    ipv4_hex = ""
+    ipv6_hextets = ["", ""]
 
     # Split input to octets
-    ipv4 = ipv4.split('.',4)
+    ipv4 = ipv4.split(".", 4)
 
     # Convert IPv4 address to hex string
     for octet in ipv4:
-        if len(hex(int(octet))[2:])>1:
-            ipv4Hex += hex(int(octet))[2:]
+        if len(hex(int(octet))[2:]) > 1:
+            ipv4_hex += hex(int(octet))[2:]
         else:
-            ipv4Hex += '0'
-            ipv4Hex += hex(int(octet))[2:]
+            ipv4_hex += "0"
+            ipv4_hex += hex(int(octet))[2:]
 
     # Split into hextets
     for i in range(4):
-        ipv6Hextet2 += (ipv4Hex[i])
-    for i in range(4,8):
-        ipv6Hextet3 += (ipv4Hex[i])
+        ipv6_hextets[0] += ipv4_hex[i]
+    for i in range(4, 8):
+        ipv6_hextets[1] += ipv4_hex[i]
 
     # Convert to dec and back to remove leading zeros
-    ipv6Hextet2 = hex(int(ipv6Hextet2,16))[2:]
-    ipv6Hextet3 = hex(int(ipv6Hextet3,16))[2:]
+    ipv6_hextets[0] = hex(int(ipv6_hextets[0], 16))[2:]
+    ipv6_hextets[1] = hex(int(ipv6_hextets[1], 16))[2:]
 
     # Form 6to4 address
-    output_6to4 = f"{ipv6Hextet1}:{ipv6Hextet2}:{ipv6Hextet3}::/128"
+    output_6to4 = f"2002:{ipv6_hextets[0]}:{ipv6_hextets[1]}::/128"
     return output_6to4
 
 
@@ -50,5 +54,5 @@ def main():  # pragma: no cover
     print(output)
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     main()  # pragma: no cover