From 5ada385b918686610282732f658f317aff95a461 Mon Sep 17 00:00:00 2001
From: Elliott Jin <elliott.jin@gmail.com>
Date: Sun, 19 Mar 2017 13:09:54 -0700
Subject: [PATCH] refactor: Check for empty list with `len(X) == 0` instead of
 `not X`.

---
 tools/lint-all | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/lint-all b/tools/lint-all
index ba54c80479..b3ba59d6f0 100755
--- a/tools/lint-all
+++ b/tools/lint-all
@@ -45,7 +45,7 @@ def bright_red_output():
 
 def check_pyflakes(options, by_lang):
     # type: (Any, Dict[str, List[str]]) -> bool
-    if not by_lang['py']:
+    if len(by_lang['py']) == 0:
         return False
     failed = False
     pyflakes = subprocess.Popen(['pyflakes'] + by_lang['py'],
@@ -671,7 +671,7 @@ def run():
         @lint
         def css():
             # type: () -> int
-            if not by_lang['css']:
+            if len(by_lang['css']) == 0:
                 return 0
             result = subprocess.call(['tools/check-css'] + by_lang['css'])
             return result
@@ -688,7 +688,7 @@ def run():
         @lint
         def puppet():
             # type: () -> int
-            if not by_lang['pp']:
+            if len(by_lang['pp']) == 0:
                 return 0
             result = subprocess.call(['puppet', 'parser', 'validate'] + by_lang['pp'])
             return result