fix: display port in runtime error when server is running

emmanuel-ferdman · maartenbreddels · commit cafe757c90a0 · 2025-04-29T09:48:48.000+02:00
Signed-off-by: Emmanuel Ferdman &lt;emmanuelferdman@gmail.com&gt;
diff --git a/solara/test/pytest_plugin.py b/solara/test/pytest_plugin.py
@@ -334,7 +334,7 @@ def signal_stop(self):
 
     def serve(self):
         if self.has_started():
-            raise RuntimeError("Jupyter server already running, use lsof -i :{self.port} to find the process and kill it")
+            raise RuntimeError(f"Jupyter server already running, use lsof -i :{self.port} to find the process and kill it")
         cmd = (
             "voila --no-browser --VoilaTest.log_level=DEBUG --Voila.port_retries=0 --VoilaExecutor.timeout=240"
             f' --Voila.port={self.port} --show_tracebacks=True "{self.notebook_path}" --enable_nbextensions=True'
