Merge pull request #106 from golemfactory/0.3-winpy3.6-fix

add a work-around to make the examples work on win+py3.6/3.7

examples/blender/blender.py

@@ -86,6 +86,9 @@ async def worker(ctx: WorkContext, tasks):
     parser.set_defaults(log_file="blender-yapapi.log")
     args = parser.parse_args()
 
+    # This is only required when running on Windows with Python prior to 3.8:
+    utils.windows_event_loop_fix()
+
     enable_default_logger(log_file=args.log_file)
     loop = asyncio.get_event_loop()
     subnet = args.subnet_tag

examples/utils.py

@@ -1,5 +1,7 @@
 """Utilities for yapapi example scripts."""
 import argparse
+import asyncio
+import sys
 
 TEXT_COLOR_RED = "\033[31;1m"
 TEXT_COLOR_GREEN = "\033[32;1m"
@@ -21,3 +23,15 @@ def build_parser(description: str):
         "--log-file", default=None, help="Log file for YAPAPI; default: %(default)s"
     )
     return parser
+
+
+def windows_event_loop_fix():
+    """Set up asyncio to use ProactorEventLoop implementation for new event loops on Windows."""
+
+    # For Python 3.8 ProactorEventLoop is already the default on Windows
+    if sys.platform == "win32" and sys.version_info < (3, 8):
+
+        class _WindowsEventPolicy(asyncio.events.BaseDefaultEventLoopPolicy):
+            _loop_factory = asyncio.windows_events.ProactorEventLoop
+
+        asyncio.set_event_loop_policy(_WindowsEventPolicy())

examples/yacat/yacat.py

@@ -140,6 +140,9 @@ async def worker_find_password(ctx: WorkContext, tasks):
 
     args = parser.parse_args()
 
+    # This is only required when running on Windows with Python prior to 3.8:
+    utils.windows_event_loop_fix()
+
     enable_default_logger(log_file=args.log_file)
 
     sys.stderr.write(

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "poetry.masonry.api"
 
 [tool.poetry]
 name = "yapapi"
-version = "0.3.0"
+version = "0.3.1-alpha.0"
 description = "High-level Python API for the New Golem"
 authors = ["Przemysław K. Rekucki <[email protected]>"]
 license = "LGPL-3.0-or-later"