Python 3 asyncio selectors fix (#344)

recipes/python3crystax/__init__.py

@@ -161,7 +161,7 @@ class Python3Recipe(TargetPythonRecipe):
     def prebuild_arch(self, arch):
         super(Python3Recipe, self).prebuild_arch(arch)
         if self.version == '3.6':
-            Python3Recipe.patches = ['patch_python3.6.patch']
+            Python3Recipe.patches = ['patch_python3.6.patch', 'selectors.patch']
             build_dir = self.get_build_dir(arch.arch)
             shprint(sh.ln, '-sf',
                            realpath(join(build_dir, 'Lib/site-packages/README.txt')),

recipes/python3crystax/selectors.patch

@@ -0,0 +1,15 @@
+--- a/Lib/selectors.py	2018-06-27 00:39:50.000000000 +0100
++++ b/Lib/selectors.py	2018-10-28 17:39:46.027757518 +0100
+@@ -599,9 +599,9 @@
+ # Choose the best implementation, roughly:
+ #    epoll|kqueue|devpoll > poll > select.
+ # select() also can't accept a FD > FD_SETSIZE (usually around 1024)
+-if 'KqueueSelector' in globals():
+-    DefaultSelector = KqueueSelector
+-elif 'EpollSelector' in globals():
++#if 'KqueueSelector' in globals():
++#    DefaultSelector = KqueueSelector
++if 'EpollSelector' in globals():
+     DefaultSelector = EpollSelector
+ elif 'DevpollSelector' in globals():
+     DefaultSelector = DevpollSelector

src/main/python/lbrynetservice.py

@@ -1,10 +1,24 @@
+import sys
+from twisted.internet import asyncioreactor
+if 'twisted.internet.reactor' not in sys.modules:
+    asyncioreactor.install()
+else:
+    from twisted.internet import reactor
+    if not isinstance(reactor, asyncioreactor.AsyncioSelectorReactor) and getattr(sys, 'frozen', False):
+        # pyinstaller hooks install the default reactor before
+        # any of our code runs, see kivy for similar problem:
+        #    https://github.com/kivy/kivy/issues/4182
+        del sys.modules['twisted.internet.reactor']
+        asyncioreactor.install()
+        from twisted.internet import reactor
+
 import keyring.backend
 import platform
 import ssl
+from jnius import autoclass
 
 # Fixes / patches / overrides
 # platform.platform() in libc_ver: IOError: [Errno 21] Is a directory
-from jnius import autoclass
 lbrynet_utils = autoclass('io.lbry.browser.Utils')
 service = autoclass('io.lbry.browser.LbrynetService').serviceInstance
 platform.platform = lambda: 'Android %s (API %s)' % (lbrynet_utils.getAndroidRelease(), lbrynet_utils.getAndroidSdk())
@@ -76,7 +90,7 @@ keyring.set_keyring(LbryAndroidKeyring())
 
 import logging.handlers
 from lbrynet.core import log_support
-from twisted.internet import defer, reactor
+from twisted.internet import reactor
 
 from lbrynet import analytics
 from lbrynet import conf