Style change in packaging: use “not in” over “not x in”.

Such tests are IMO easier to read if both operators are grouped.

1 files changed, 4 insertions, 4 deletions

diff --git a/Lib/packaging/create.py b/Lib/packaging/create.py
index c18d42fb02..917b6cf849 100644
--- a/Lib/packaging/create.py
+++ b/Lib/packaging/create.py
@@ -175,11 +175,11 @@ def convert_yn_to_bool(yn, yes=True, no=False):
 def _build_classifiers_dict(classifiers):
     d = {}
     for key in classifiers:
-        subDict = d
+        subdict = d
         for subkey in key.split(' :: '):
-            if not subkey in subDict:
-                subDict[subkey] = {}
-            subDict = subDict[subkey]
+            if subkey not in subdict:
+                subdict[subkey] = {}
+            subdict = subdict[subkey]
     return d
 
 CLASSIFIERS = _build_classifiers_dict(_CLASSIFIERS_LIST)