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-rw-r--r--src/libcore/unicode/printable.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libcore/unicode/printable.py b/src/libcore/unicode/printable.py
index 748917f1d34..4e8b4ecad02 100644
--- a/src/libcore/unicode/printable.py
+++ b/src/libcore/unicode/printable.py
@@ -60,7 +60,7 @@ def get_codepoints(f):
         yield Codepoint(codepoint, class_)
         prev_codepoint = codepoint
 
-    if class_first != None:
+    if class_first is not None:
         raise ValueError("Missing Last after First")
 
     for c in range(prev_codepoint + 1, NUM_CODEPOINTS):