Try to disable buffering

Author: krassowski

python_packages/jupyter_lsp/jupyter_lsp/session.py

@@ -137,6 +137,7 @@ def init_process(self):
             stdin=subprocess.PIPE,
             stdout=subprocess.PIPE,
             env=self.substitute_env(self.spec.get("env", {}), os.environ),
+            bufsize=0,
         )
 
     def init_queues(self):

python_packages/jupyter_lsp/jupyter_lsp/stdio.py

@@ -31,8 +31,8 @@ class LspStdIoBase(LoggingConfigurable):
     executor = None
 
     stream = Instance(
-        io.BufferedIOBase, help="the stream to read/write"
-    )  # type: io.BufferedIOBase
+        io.RawIOBase, help="the stream to read/write"
+    )  # type: io.RawIOBase
     queue = Instance(Queue, help="queue to get/put")
 
     def __repr__(self):  # pragma: no cover

python_packages/jupyter_lsp/jupyter_lsp/tests/test_stdio.py

@@ -32,7 +32,7 @@ def spawn_writer(self, message: str, repeats: int = 1, interval=None):
             )
         )
         return subprocess.Popen(
-            ["python", "-u", str(commands_file)], stdout=subprocess.PIPE
+            ["python", "-u", str(commands_file)], stdout=subprocess.PIPE, bufsize=0
         )