diff --git a/plugins/command_completions/__init__.py b/plugins/command_completions/__init__.py
index 43c1a93c..b2618376 100644
--- a/plugins/command_completions/__init__.py
+++ b/plugins/command_completions/__init__.py
@@ -165,7 +165,7 @@ class SublimeTextCommandCompletionPythonListener(sublime_plugin.EventListener):
     @inhibit_word_completions
     def on_query_completions(self, view, prefix, locations):
         loc = locations[0]
-        python_arg_scope = ("source.python meta.function-call.arguments.python string.quoted")
+        python_arg_scope = "source.python meta.function-call.arguments.python string.quoted"
         if not view.score_selector(loc, python_arg_scope) or not is_plugin(view):
             return None
 
diff --git a/plugins/create_package.py b/plugins/create_package.py
index 61557b27..788284f3 100644
--- a/plugins/create_package.py
+++ b/plugins/create_package.py
@@ -37,7 +37,9 @@ def _create_package(name):
         os.mkdir(path)
     except FileExistsError:
         logger.error("Path exists already: %r", path)
-    except Exception:
+    except FileNotFoundError:
+        logger.error("Parent path does not exist: %r", path)
+    except OSError:
         logger.exception("Unknown error while creating path %r", path)
     else:
         return path
diff --git a/plugins/lib/fileconv/dumpers.py b/plugins/lib/fileconv/dumpers.py
index 4454bafe..f9501ba5 100644
--- a/plugins/lib/fileconv/dumpers.py
+++ b/plugins/lib/fileconv/dumpers.py
@@ -97,7 +97,8 @@ def validate_data(self, data, *args, **kwargs):
                      (lambda x: x is None, False))
                 ]
         """
-        pass
+        raise NotImplementedError
+
 
     def _validate_data(self, data, funcs):
         """Check for incompatible data recursively.
@@ -178,7 +179,7 @@ def dump(self, data, *args, **kwargs):
 
     def write(self, data, *args, **kwargs):
         """To be implemented."""
-        pass
+        raise NotImplementedError
 
 
 class JSONDumper(DumperProto):
diff --git a/plugins/lib/fileconv/loaders.py b/plugins/lib/fileconv/loaders.py
index aa66564a..cd3254a9 100644
--- a/plugins/lib/fileconv/loaders.py
+++ b/plugins/lib/fileconv/loaders.py
@@ -295,7 +295,8 @@ def parse(self, *args, **kwargs):
         """To be implemented. Should return the parsed data from
         ``self.file_path`` as a Python object.
         """
-        pass
+        raise NotImplementedError
+
 
 
 class JSONLoader(LoaderProto):
diff --git a/plugins/new_resource_file/__init__.py b/plugins/new_resource_file/__init__.py
index 97cf6445..91307e0e 100644
--- a/plugins/new_resource_file/__init__.py
+++ b/plugins/new_resource_file/__init__.py
@@ -116,4 +116,4 @@ def _is_package_path(self, file_path):
             for fp in (real_file_path, file_path):
                 if fp.startswith(pp):
                     leaf = fp[len(pp):].strip(os.sep)
-                    return (os.sep not in leaf)
+                    return os.sep not in leaf
diff --git a/plugins/syntax_dev/completions.py b/plugins/syntax_dev/completions.py
index f363ccd1..d55ec800 100644
--- a/plugins/syntax_dev/completions.py
+++ b/plugins/syntax_dev/completions.py
@@ -232,42 +232,47 @@ def match_selector(selector, offset=0):
             return all(self.view.match_selector(point + offset, selector)
                        for point in locations)
 
+        result = None
+
         # None of our business
         if not match_selector("- comment - (source.regexp - keyword.other.variable)"):
-            return None
+            result = None
 
         # Scope name completions based on our scope_data database
-        if match_selector("meta.expect-scope, meta.scope", -1):
-            return self._complete_scope(prefix, locations)
+        elif match_selector("meta.expect-scope, meta.scope", -1):
+            result = self._complete_scope(prefix, locations)
 
         # Auto-completion for include values using the 'contexts' keys and for
-        if match_selector(
+        elif match_selector(
             "meta.expect-context-list-or-content | meta.context-list-or-content",
             -1,
         ):
-            return ((self._complete_keyword(prefix, locations) or [])
+            result = ((self._complete_keyword(prefix, locations) or [])
                     + self._complete_context(prefix, locations))
 
         # Auto-completion for include values using the 'contexts' keys
-        if match_selector(
+        elif match_selector(
             "meta.expect-context-list | meta.expect-context | meta.include | meta.context-list",
             -1,
         ):
-            return self._complete_context(prefix, locations) or None
+            result = self._complete_context(prefix, locations) or None
 
         # Auto-completion for branch points with 'fail' key
-        if match_selector(
+        elif match_selector(
             "meta.expect-branch-point-reference | meta.branch-point-reference",
             -1,
         ):
-            return self._complete_branch_point()
+            result = self._complete_branch_point()
 
         # Auto-completion for variables in match patterns using 'variables' keys
-        if match_selector("keyword.other.variable"):
-            return self._complete_variable()
+        elif match_selector("keyword.other.variable"):
+            result = self._complete_variable()
 
-        # Standard completions for unmatched regions
-        return self._complete_keyword(prefix, locations)
+        else:
+            # Standard completions for unmatched regions
+            result = self._complete_keyword(prefix, locations)
+    
+        return result
 
     def _line_prefix(self, point):
         _, col = self.view.rowcol(point)