fix type annotations

datalad_next/url_operations/ssh.py

@@ -105,7 +105,7 @@ def stat(self,
             raise UrlOperationsResourceUnknown(url)
         return {k: v for k, v in props.items() if not k.startswith('_')}
 
-    def _get_props(self, url, stream: Generator) -> dict | None:
+    def _get_props(self, url, stream: Generator) -> dict:
         # Any stream must start with this magic marker, or we do not
         # recognize what is happening
         # after this marker, the server will send the size of the
@@ -258,7 +258,7 @@ def _perform_upload(self,
                         to_url: str,
                         hash_names: list[str] | None,
                         expected_size: int | None,
-                        timeout: int | None) -> dict:
+                        timeout: float | None) -> dict:
 
         hasher = self._get_hasher(hash_names)
 
@@ -273,7 +273,7 @@ def _perform_upload(self,
         #
         #   `iter(partial(src_fp.read, COPY_BUFSIZE), b'')
         #
-        upload_queue = Queue(maxsize=2)
+        upload_queue: Queue = Queue(maxsize=2)
 
         cmd = _SshCommandBuilder(to_url).get_cmd(
             # leave special exit code when writing fails, but not the
@@ -340,7 +340,7 @@ def get_cmd(self, payload_cmd: str) -> list[str]:
         cmd.extend(self.ssh_args)
         cmd.extend([
             '-e', 'none',
-            self._parsed.hostname,
+            self._parsed.hostname or '',
             payload_cmd.format(
                 fdir=str(PurePosixPath(fpath).parent),
                 fpath=fpath,