style: ruff format and the lint rules of the driver standard

Mechanical: ruff format, and ruff check --fix with the rule set every NAPALM
driver uses (E, F, I, UP, B at line length 100, Python 3.10). What ruff
cannot fix comes in the next commit.

napalm_zyxel/zyxel_driver.py

@@ -15,13 +15,12 @@ from typing import Any
 from urllib.parse import urljoin
 
 import requests
-from cryptography.hazmat.primitives import serialization
-from cryptography.hazmat.primitives.asymmetric import padding as asym_padding, rsa
-from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
 from cryptography.hazmat.backends import default_backend
-
+from cryptography.hazmat.primitives import serialization
+from cryptography.hazmat.primitives.asymmetric import padding as asym_padding
+from cryptography.hazmat.primitives.asymmetric import rsa
+from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
 from napalm.base.exceptions import ConnectionClosedException, ConnectionException
-
 from napalm_device_types import FingerprintRule, ResidentialGatewayDriver
 from napalm_device_types.models import (
     HostDict,
@@ -70,12 +69,14 @@ class ZyxelCrypto:
         decryptor = cipher.decryptor()
         padded = decryptor.update(content) + decryptor.finalize()
         pad_len = padded[-1]
-        plain = padded[: -pad_len] if 0 < pad_len <= self._AES_KEY_SIZE else padded
+        plain = padded[:-pad_len] if 0 < pad_len <= self._AES_KEY_SIZE else padded
         return json.loads(plain.decode("ascii"))
 
     def encrypt_aes_key_with_rsa(self, pubkey_pem: str) -> str:
         """Encrypt the AES key with the device's RSA public key for key exchange."""
-        pubkey = serialization.load_pem_public_key(pubkey_pem.encode("ascii"), backend=default_backend())
+        pubkey = serialization.load_pem_public_key(
+            pubkey_pem.encode("ascii"), backend=default_backend()
+        )
         if not isinstance(pubkey, rsa.RSAPublicKey):
             raise ValueError("Not an RSA public key")
         encrypted = pubkey.encrypt(
@@ -127,9 +128,7 @@ class ZyxelVMGDriver(ResidentialGatewayDriver):
         self._session: requests.Session | None = None
         self._sessionkey: str | None = None
         self._crypto: ZyxelCrypto | None = None
-        self._base_url: str = (
+        self._base_url: str = f"{'https' if self.use_tls else 'http'}://{self.hostname}:{self.port}"
-            f"{'https' if self.use_tls else 'http'}://{self.hostname}:{self.port}"
-        )
 
     def _url(self, path: str) -> str:
         return urljoin(f"{self._base_url}/", path)
@@ -143,24 +142,18 @@ class ZyxelVMGDriver(ResidentialGatewayDriver):
 
         info = self._get_basic_info()
         if info is None:
-            raise ConnectionException(
+            raise ConnectionException(f"Cannot reach Zyxel device at {self._base_url}")
-                f"Cannot reach Zyxel device at {self._base_url}"
-            )
         self._device_info = info
 
         crypto = ZyxelCrypto()
         pubkey = self._get_rsa_pubkey()
         if pubkey is None:
-            raise ConnectionException(
+            raise ConnectionException(f"Cannot obtain RSA public key from {self._base_url}")
-                f"Cannot obtain RSA public key from {self._base_url}"
-            )
         enc_key = crypto.encrypt_aes_key_with_rsa(pubkey)
 
         login_data = {
             "Input_Account": self.username,
-            "Input_Passwd": base64.b64encode(
+            "Input_Passwd": base64.b64encode(self.password.encode("ascii")).decode("ascii"),
-                self.password.encode("ascii")
-            ).decode("ascii"),
             "RememberPassword": 0,
             "SHA512_password": False,
         }
@@ -332,12 +325,14 @@ class ZyxelVMGDriver(ResidentialGatewayDriver):
         for host in self.get_hosts():
             if not host["is_active"] or not host["mac"] or not host["ip"]:
                 continue
-            arp.append({
+            arp.append(
+                {
                     "interface": host["interface_type"],
                     "mac": host["mac"],
                     "ip": host["ip"],
                     "age": 0.0,
-            })
+                }
+            )
         return arp
 
     def get_lldp_neighbors(self) -> dict[str, Any]:
@@ -390,14 +385,17 @@ class ZyxelVMGDriver(ResidentialGatewayDriver):
         source_interface: str = "",
     ) -> dict[str, Any]:
         """Ping a destination via the device's DAL diagnostics."""
-        result = self._dal_query("PINGTEST", {
+        result = self._dal_query(
+            "PINGTEST",
+            {
                 "ProtocolVersion": "IPv4",
                 "Host": destination,
                 "DiagnosticsState": "Requested",
                 "DNSServer": "",
                 "NumberOfRepetitions": count,
                 "type": 0,
-        })
+            },
+        )
         if result is None:
             return {"success": {}, "error": "Ping not supported via DAL"}
         return {
@@ -487,9 +485,7 @@ class ZyxelVMGDriver(ResidentialGatewayDriver):
         """Not supported on Zyxel VMG."""
         raise NotImplementedError("Zyxel VMG does not support config replacement via NAPALM")
 
-    def load_merge_candidate(
+    def load_merge_candidate(self, filename: str | None = None, config: str | None = None) -> None:
-        self, filename: str | None = None, config: str | None = None
-    ) -> None:
         """Not supported on Zyxel VMG."""
         raise NotImplementedError("Zyxel VMG does not support config merge via NAPALM")
 
@@ -562,14 +558,16 @@ class ZyxelVMGDriver(ResidentialGatewayDriver):
     def _parse_port_forwards_html(self, html: str) -> list[PortForwardDict]:
         forwards: list[PortForwardDict] = []
         for match in self._PORT_FORWARD_RE.finditer(html):
-            forwards.append({
+            forwards.append(
+                {
                     "name": match.group("name").strip(),
                     "protocol": match.group("proto").upper(),
                     "external_port": int(match.group("ext_port")),
                     "internal_ip": match.group("int_ip"),
                     "internal_port": int(match.group("int_port")),
                     "enabled": True,
-            })
+                }
+            )
         return forwards
 
     def get_hosts(self) -> list[HostDict]:
@@ -620,13 +618,15 @@ class ZyxelVMGDriver(ResidentialGatewayDriver):
     def _parse_hosts_html(self, html: str) -> list[HostDict]:
         hosts: list[HostDict] = []
         for match in self._HOST_RE.finditer(html):
-            hosts.append({
+            hosts.append(
+                {
                     "mac": match.group("mac").lower(),
                     "ip": match.group("ip"),
                     "hostname": match.group("hostname") or "",
                     "interface_type": "lan",
                     "is_active": True,
-            })
+                }
+            )
         return hosts
 
     def get_nat_translations(self) -> list[NATTranslationDict]:
@@ -636,14 +636,16 @@ class ZyxelVMGDriver(ResidentialGatewayDriver):
         for forward in self.get_port_forwards():
             if not forward["enabled"]:
                 continue
-            translations.append({
+            translations.append(
+                {
                     "protocol": forward["protocol"].lower(),
                     "inside_local": f"{forward['internal_ip']}:{forward['internal_port']}",
                     "inside_global": f"{wan_ip}:{forward['external_port']}",
                     "outside_local": "0.0.0.0:0",
                     "outside_global": "0.0.0.0:0",
                     "age": 0.0,
-            })
+                }
+            )
         return translations
 
     def get_vpn_tunnels(self) -> dict[str, VPNTunnelDict]:
@@ -701,7 +703,8 @@ class ZyxelVMGDriver(ResidentialGatewayDriver):
     def _parse_wireless_clients_html(self, html: str) -> list[WirelessClientDict]:
         clients: list[WirelessClientDict] = []
         for match in self._WIFI_CLIENT_RE.finditer(html):
-            clients.append({
+            clients.append(
+                {
                     "mac": match.group("mac").lower(),
                     "ssid": "",
                     "radio": "wlan0",
@@ -711,7 +714,8 @@ class ZyxelVMGDriver(ResidentialGatewayDriver):
                     "rx_rate": 0.0,
                     "uptime": 0,
                     "ip": match.group("ip"),
-            })
+                }
+            )
         return clients
 
     def get_ssids(self) -> dict[str, SSIDDict]:
@@ -784,7 +788,9 @@ class ZyxelVMGDriver(ResidentialGatewayDriver):
                         "enabled": bool(entry.get("Enabled", entry.get("enabled", True))),
                         "band": "2.4GHz" if channel <= 14 else "5GHz",
                         "channel": channel,
-                        "channel_width": int(entry.get("ChannelWidth", entry.get("channel_width", 0)) or 0),
+                        "channel_width": int(
+                            entry.get("ChannelWidth", entry.get("channel_width", 0)) or 0
+                        ),
                         "tx_power": int(entry.get("TxPower", entry.get("tx_power", 0)) or 0),
                         "frequency": float(entry.get("Frequency", entry.get("frequency", 0)) or 0),
                     }

pyproject.toml

@@ -49,7 +49,14 @@ include = ["napalm_zyxel*"]
 
 [tool.ruff]
 line-length = 100
-target-version = "py39"
+target-version = "py310"
+
+[tool.ruff.lint]
+select = ["E", "F", "I", "UP", "B"]
+
+[tool.ruff.lint.per-file-ignores]
+# Recorded device output keeps its lines.
+"tests/**" = ["E501"]
 
 [tool.pytest.ini_options]
 testpaths = ["tests"]

tests/test_zyxel.py

@@ -3,12 +3,10 @@ from unittest.mock import MagicMock, patch
 
 import pytest
 import requests
-
 from napalm.base.exceptions import ConnectionException
 
 from napalm_zyxel import ZyxelVMGDriver
 
-
 MOCK_BASIC_INFO = {
     "ModelName": "VMG4005-B50A",
     "SoftwareVersion": "V5.13(ABKS.1)C0",
@@ -117,7 +115,8 @@ class TestZyxelVMGDriver:
             mock_crypto = MagicMock()
             mock_crypto.encrypt_json.return_value = {"content": "ENC", "iv": "IV", "key": ""}
             mock_crypto.decrypt_response.return_value = {
-                "result": "ZCFG_SUCCESS", "sessionkey": "12345"
+                "result": "ZCFG_SUCCESS",
+                "sessionkey": "12345",
             }
             mock_crypto.encrypt_aes_key_with_rsa.return_value = "ENC_KEY"
             mock_crypto_cls.return_value = mock_crypto
@@ -127,12 +126,8 @@ class TestZyxelVMGDriver:
             session.post.return_value = MockResponse(MOCK_LOGIN_RESPONSE)
 
             with patch.object(self.driver, "_session", session, create=False):
-                with patch.object(
+                with patch.object(self.driver, "_get_rsa_pubkey", return_value=MOCK_RSA_KEY):
-                    self.driver, "_get_rsa_pubkey", return_value=MOCK_RSA_KEY
+                    with patch.object(self.driver, "_get_basic_info", return_value=MOCK_BASIC_INFO):
-                ):
-                    with patch.object(
-                        self.driver, "_get_basic_info", return_value=MOCK_BASIC_INFO
-                    ):
                         self.driver._session = None
                         self.driver._crypto = None
                         self.driver._sessionkey = None