From d0c8b7d8af02490c7eab293bed27ebb1da397dbc Mon Sep 17 00:00:00 2001
From: Alex Stokes <r.alex.stokes@gmail.com>
Date: Tue, 24 Sep 2019 19:12:04 -0700
Subject: [PATCH] Avoid sharing default dictionary argument across all
 instances of class

---
 libp2p/protocol_muxer/multiselect.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/libp2p/protocol_muxer/multiselect.py b/libp2p/protocol_muxer/multiselect.py
index 72279c6..06e268a 100644
--- a/libp2p/protocol_muxer/multiselect.py
+++ b/libp2p/protocol_muxer/multiselect.py
@@ -19,7 +19,11 @@ class Multiselect(IMultiselectMuxer):
 
     handlers: Dict[TProtocol, StreamHandlerFn]
 
-    def __init__(self, default_handlers: Dict[TProtocol, StreamHandlerFn] = {}) -> None:
+    def __init__(
+        self, default_handlers: Dict[TProtocol, StreamHandlerFn] = None
+    ) -> None:
+        if not default_handlers:
+            default_handlers = {}
         self.handlers = default_handlers
 
     def add_handler(self, protocol: TProtocol, handler: StreamHandlerFn) -> None: