Fix some flake8 errors

Author: tarruda

neovim/api/common.py

@@ -115,6 +115,10 @@ def __contains__(self, item):
         return False
 
 
+def _identity(obj, session, method, kind):
+    return obj
+
+
 class SessionHook(object):
 
     """Pair of functions to filter objects coming/going from/to Nvim.
@@ -134,9 +138,7 @@ class SessionHook(object):
     This class also provides a `compose` method for composing hooks.
     """
 
-    identity = lambda obj, session, method, kind: obj
-
-    def __init__(self, from_nvim=identity, to_nvim=identity):
+    def __init__(self, from_nvim=_identity, to_nvim=_identity):
         """Initialize a SessionHook with from/to filters."""
         self.from_nvim = from_nvim
         self.to_nvim = to_nvim
@@ -148,9 +150,9 @@ def compose(self, other):
         a new SessionHook instance with the composed filters.
         """
         def comp(f1, f2):
-            if f1 is SessionHook.identity:
+            if f1 is _identity:
                 return f2
-            if f2 is SessionHook.identity:
+            if f2 is _identity:
                 return f1
             return lambda o, s, m, k: f1(f2(o, s, m, k), s, m, k)
 

neovim/plugin/host.py

@@ -116,7 +116,8 @@ def _discover_classes(self, module, handlers, plugin_path):
                 self._discover_functions(plugin, handlers, plugin_path)
 
     def _discover_functions(self, obj, handlers, plugin_path):
-        predicate = lambda o: hasattr(o, '_nvim_rpc_method_name')
+        def predicate(o):
+            return hasattr(o, '_nvim_rpc_method_name')
         specs = []
         for _, fn in inspect.getmembers(obj, predicate):
             if fn._nvim_bind:

neovim/ui/tickit_ui.py

@@ -377,7 +377,8 @@ def interrupt():
             bridge.input('<C-c>')
 
         def input_check():
-            check_timeout = lambda: lib.tickit_term_input_check_timeout(tt)
+            def check_timeout():
+                return lib.tickit_term_input_check_timeout(tt)
             lib.tickit_term_input_readable(tt)
             sleep = check_timeout()
             if sleep != -1: