Pylint: Fix or disable used-before-assignment

src/gevent/_ffi/watcher.py

@@ -66,7 +66,7 @@ __all__ = [
 ]
 
 try:
-    ResourceWarning
+    ResourceWarning # pylint:disable=used-before-assignment
 except NameError:
     class ResourceWarning(Warning):
         "Python 2 fallback"

src/gevent/_sslgte279.py

@@ -47,7 +47,7 @@ __imports__ = copy_globals(__ssl__, globals(),
                            dunder_names_to_keep=())
 
 try:
-    _delegate_methods
+    _delegate_methods # pylint:disable=used-before-assignment
 except NameError: # PyPy doesn't expose this detail
     _delegate_methods = ('recv', 'recvfrom', 'recv_into', 'recvfrom_into', 'send', 'sendto')
 

src/gevent/subprocess.py

@@ -280,7 +280,7 @@ else:
     from gevent.os import fork_and_watch
 
 try:
-    BrokenPipeError
+    BrokenPipeError # pylint:disable=used-before-assignment
 except NameError: # Python 2
     class BrokenPipeError(Exception):
         "Never raised, never caught."

src/gevent/tests/test__event.py

@@ -269,12 +269,14 @@ class TestAsyncResultCrossThread(greentest.TestCase):
                 gevent.get_hub().destroy(destroy_loop=True)
 
         thread = Thread()
+        glet = None
         try:
             glet = gevent.spawn(thread.start)
             result = thread.async_result.wait(self.BG_WAIT_DELAY)
         finally:
             thread.join(DELAY * 15)
-            glet.join(DELAY)
+            if glet is not None:
+                glet.join(DELAY)
         self._check_result(result)
 
     @greentest.ignores_leakcheck

src/gevent/tests/test__fileobject.py

@@ -25,7 +25,7 @@ import gevent.testing as greentest
 from gevent.testing import sysinfo
 
 try:
-    ResourceWarning
+    ResourceWarning # pylint:disable=used-before-assignment
 except NameError:
     class ResourceWarning(Warning):
         "Python 2 fallback"

src/gevent/tests/test__selectors.py

@@ -32,6 +32,7 @@ class SelectorTestMixin(object):
 
     def _check_selector(self, sel):
         server, client = socket.socketpair()
+        glet = None
         try:
             sel.register(server, selectors.EVENT_READ, self.read_from_ready_socket_and_reply)
             glet = gevent.spawn(self.run_selector_once, sel)
@@ -43,8 +44,9 @@ class SelectorTestMixin(object):
             sel.close()
             server.close()
             client.close()
-            glet.join(10)
-        self.assertTrue(glet.ready())
+            if glet is not None:
+                glet.join(10)
+        self.assertTrue(glet is not None and glet.ready())
 
 
 class GeventSelectorTest(SelectorTestMixin,