Improve python API: Fix PEP8 compliance.

- Two blank lines before function.
- Use def instead of assigning lambda to local variable.

Author: elmart

neovim/msgpack_rpc/event_loop/uv.py

@@ -108,7 +108,10 @@ def _on_async(self, handle):
 
     def _setup_signals(self, signals):
         self._signal_handles = []
-        handler = lambda h, signum: self._on_signal(signum)
+
+        def handler(h, signum):
+            self._on_signal(signum)
+
         for signum in signals:
             handle = pyuv.Signal(self._loop)
             handle.start(handler, signum)

test/common.py

@@ -63,6 +63,7 @@
 
 vim.input(cleanup_func)
 
+
 def cleanup():
     # cleanup nvim
     vim.command('call BeforeEachTest()')