Merge pull request #215 in LCL/wolframclientforpython from bugfix/fix-backward-incompatible-changes to master

* commit 'd5a1a870029122360304c314f03626c701485b71':
  incrementing paclet version
  Finer control over version and available functions

Author: crazyeng

PacletInfo.m

@@ -1,6 +1,6 @@
 Paclet[
     Name -> "WolframClientForPython",
-    Version -> "1.1.1",
+    Version -> "1.1.2",
     MathematicaVersion -> "11.3+",
     Loading -> Automatic,
     Extensions -> {}

wolframclient/about.py

@@ -2,6 +2,6 @@
 
 __name__ = "wolframclient"
 __description__ = "A Python library with various tools to interact with the Wolfram Language and the Wolfram Cloud."
-__version__ = "1.1.1"
+__version__ = "1.1.2"
 __author__ = "Wolfram Research"
 __author_email__ = "support@wolfram.com, dorianb@wolfram.com, riccardod@wolfram.com"

wolframclient/evaluation/kernel/initkernel.m

@@ -21,8 +21,9 @@ no matter the total size (tested with 80MB) *)
 
 Begin["`Private`"];
 
+
 (*Define the most efficient pair of write bytearray and non-blocking read, for various WL versions. *)
-{SocketWriteByteArrayFunc, SocketReadByteArrayFuncNoWait} = If[
+{SocketWriteByteArrayFunc, SocketReadByteArrayFuncNoWait} = Which[
 	$VersionNumber < 12,
 	{
 		Function[{socketOut, ba}, ZeroMQLink`Private`ZMQWriteInternal[socketOut, Normal[ba]]],
@@ -32,13 +33,23 @@ no matter the total size (tested with 80MB) *)
 				If[Length[data] >= 3, Part[data,4;;], {}]
 			]
 		]
-	}
+	},
+	$VersionNumber < 12.1,
+	{
+		Function[{socketOut, ba}, ZMQSocketWriteMessage[socketOut, ba]],
+		Function[{socketIn},
+			Block[
+				{data = iRecvSingleMultipartBinaryMessageSocket[First@socketIn, 1(*Flag NOWAIT*)]},
+				If[Length[data] >= 3, Part[data,4;;], {}]
+			]
+		]
+	},
+	True
 	,
 	{
 		ZMQSocketWriteMessage,
 		SocketReadMessage[#, "Blocking"->False] &
 	}
-
 ];
 
 $DEBUG=1;