From 85e1c8f58a9f3207ddfefdd4435e29cbf4523d2c Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 12 Aug 2026 15:52:34 +0000
Subject: [PATCH 1/2] Initial plan


From 112ef8280f5394b87d226b4371e5876128bdad74 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 12 Aug 2026 15:56:31 +0000
Subject: [PATCH 2/2] Handle optional muselsl/pylsl imports in EEG device
 module

Co-authored-by: JohnGriffiths <397826+JohnGriffiths@users.noreply.github.com>
---
 eegnb/devices/eeg.py | 43 +++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 41 insertions(+), 2 deletions(-)

diff --git a/eegnb/devices/eeg.py b/eegnb/devices/eeg.py
index 6c017ed2..eb320885 100644
--- a/eegnb/devices/eeg.py
+++ b/eegnb/devices/eeg.py
@@ -15,13 +15,52 @@
 import pandas as pd
 
 from brainflow.board_shim import BoardShim, BoardIds, BrainFlowInputParams
-from muselsl import stream, list_muses, record, constants as mlsl_cnsts
-from pylsl import StreamInfo, StreamOutlet, StreamInlet, resolve_byprop
 
 from serial import Serial, EIGHTBITS, PARITY_NONE, STOPBITS_ONE
 
 from eegnb.utils.missing import missing_module
 
+try:
+    from muselsl import stream, list_muses, record, constants as mlsl_cnsts
+except (ImportError, OSError):
+    muselsl = missing_module(
+        "muselsl",
+        "The MuseLSL backend (Muse 2016, Muse 2, and Muse S devices)",
+        "streaming",
+    )
+
+    def stream(*args, **kwargs):
+        return muselsl.stream(*args, **kwargs)
+
+    def list_muses(*args, **kwargs):
+        return muselsl.list_muses(*args, **kwargs)
+
+    def record(*args, **kwargs):
+        return muselsl.record(*args, **kwargs)
+
+    mlsl_cnsts = muselsl
+
+try:
+    from pylsl import StreamInfo, StreamOutlet, StreamInlet, resolve_byprop
+except (ImportError, OSError):
+    pylsl = missing_module(
+        "pylsl",
+        "The LSL streaming backend (including MuseLSL marker/data transport)",
+        "streaming",
+    )
+
+    def StreamInfo(*args, **kwargs):
+        return pylsl.StreamInfo(*args, **kwargs)
+
+    def StreamOutlet(*args, **kwargs):
+        return pylsl.StreamOutlet(*args, **kwargs)
+
+    def StreamInlet(*args, **kwargs):
+        return pylsl.StreamInlet(*args, **kwargs)
+
+    def resolve_byprop(*args, **kwargs):
+        return pylsl.resolve_byprop(*args, **kwargs)
+
 try:
     import pyxid2
 except (ImportError, OSError):