upgrade pylint (#10121)

we need this for https://github.com/certbot/certbot/issues/10045

certbot/certbot/_internal/main.py

@@ -280,7 +280,8 @@ def _handle_identical_cert_request(config: configuration.NamespaceConfig,
 
     if config.verb == "run":
         keep_opt = "Attempt to reinstall this existing certificate"
-    elif config.verb == "certonly":
+    else:
+        assert config.verb == "certonly", "Unexpected Certbot subcommand"
         keep_opt = "Keep the existing certificate for now"
     choices = [keep_opt,
                "Renew & replace the certificate (may be subject to CA rate limits)"]

certbot/certbot/util.py

@@ -407,7 +407,11 @@ def get_os_info_ua() -> str:
 
     :returns: os_ua
     :rtype: `str`
+
     """
+    # distro.name returns an empty string if one cannot be determined. see
+    # https://github.com/python-distro/distro/blob/3bd19e61fcb7f8d2bf3d45d9e40d69c92e05d241/src/distro/distro.py#L883
+    os_info = ""
     if _USE_DISTRO:
         os_info = distro.name(pretty=True)