new running_loop printer's property

prusa/connect/printer/__init__.py

@@ -183,6 +183,11 @@ def connect_url(host: str, tls: bool, port: int = 0):
             return f"{protocol}://{host}:{port}"
         return f"{protocol}://{host}"
 
+    @property
+    def running_loop(self):
+        """Return if loop is running (if was started but not stopped)."""
+        return self.__running_loop
+
     @property
     def printed_file_cb(self):
         """Returns path of currently printed file"""
@@ -699,7 +704,7 @@ def register(self):
             else:
                 errors.HTTP.ok = True
                 HTTP.state = CondState.OK
-            log.debug("Status code: {res.status_code}")
+            log.debug("Status code: %d", res.status_code)
             raise RuntimeError(res.text)
 
         self.code = res.headers["Code"]