drop 4 async generators.

Async generators are not valid in 3.5.
They are not critical.

Author: Dorian Birraux

CHANGELOG.md

@@ -1,5 +1,6 @@
 # Version 1.1.3
 - Update asynchronous evaluator classes. Remove the `loop` parameter. Most optional loop parameters are deprecated in the Python standart library `asyncio` and in most libraries, mainly because it is misleading and lead to misuses and bugs. The loop parameter is useful when instantiating asynchronous evaluators outside the scope of an event loop. It's implementation was not good enough and was relying on usages deprecated in 3.8.
+- Removing four asynchronous generators in asynchronous evaluation result classes: `iter_messages`, `iter_messages_name`, `iter_messages_tuple` and `iter_output`. These coroutines are only working on python 3.6+ and are not critical enough to drop support for 3.5. Asynchronous properties: `messages`, `messages_name` and `output` provide the same information.
 
 # Version 1.1.2
 - Fix a backward incompatible change introduced in 12.1. Make sure the library works with any kernel version starting with 11.3.

wolframclient/evaluation/result.py

@@ -372,29 +372,39 @@ async def messages_name(self):
             await self.build()
         return self._messages_name
 
-    async def iter_messages(self):
-        """
-        Iterator over all text messages issued during the evaluation.
-        :return: message text as a string.
-        """
-        msgs = await self.messages
-        if msgs:
-            for msg in msgs:
-                yield msg
-
-    async def iter_messages_name(self):
-        names = await self.messages_name
-        if names:
-            for name in names:
-                yield name
-
-    async def iter_messages_tuple(self):
-        """ Iterator over all messages returned as a tuple: (message name, message text)"""
-        msg = await self.messages
-        names = await self.messages_name
-        if msg and names:
-            for tuple_msg in zip(names, msg):
-                yield tuple_msg
+    # a bunch of asynchronous generators. These functions are not critical and we can't define them on 3.5.
+    # removing them for now.
+    #
+    # async def iter_messages(self):
+    #     """
+    #     Iterator over all text messages issued during the evaluation.
+    #     :return: message text as a string.
+    #     """
+    #     msgs = await self.messages
+    #     if msgs:
+    #         for msg in msgs:
+    #             yield msg
+    #
+    # async def iter_messages_name(self):
+    #     names = await self.messages_name
+    #     if names:
+    #         for name in names:
+    #             yield name
+    #
+    # async def iter_messages_tuple(self):
+    #     """ Iterator over all messages returned as a tuple: (message name, message text)"""
+    #     msg = await self.messages
+    #     names = await self.messages_name
+    #     if msg and names:
+    #         for tuple_msg in zip(names, msg):
+    #             yield tuple_msg
+    #
+    # async def iter_output(self):
+    #     """ Iterator over all printed output."""
+    #     output = await self.output
+    #     if output:
+    #         for line in self.output:
+    #             yield line
 
     @property
     async def output(self):
@@ -403,13 +413,6 @@ async def output(self):
             await self.build()
         return self._output
 
-    async def iter_output(self):
-        """ Iterator over all printed output."""
-        output = await self.output
-        if output:
-            for line in self.output:
-                yield line
-
     @property
     async def is_message_failure(self):
         if not self._built: