Update websocket-client to 0.57.0

lib/websocket/_ssl_compat.py

@@ -19,12 +19,13 @@ Copyright (C) 2010 Hiroki Ohtani(liris)
     Boston, MA 02110-1335  USA
 
 """
-
-__all__ = ["HAVE_SSL", "ssl", "SSLError"]
+__all__ = ["HAVE_SSL", "ssl", "SSLError", "SSLWantReadError", "SSLWantWriteError"]
 
 try:
     import ssl
     from ssl import SSLError
+    from ssl import SSLWantReadError
+    from ssl import SSLWantWriteError
     if hasattr(ssl, 'SSLContext') and hasattr(ssl.SSLContext, 'check_hostname'):
         HAVE_CONTEXT_CHECK_HOSTNAME = True
     else:
@@ -42,4 +43,12 @@ except ImportError:
     class SSLError(Exception):
         pass
 
+    class SSLWantReadError(Exception):
+        pass
+
+    class SSLWantWriteError(Exception):
+        pass
+
+    ssl = lambda: None
+
     HAVE_SSL = False