More type annotations.

[python_utils.git] / histogram.py

diff --git a/histogram.py b/histogram.py
index 993b5036d737cdcd705ef411e5cbcf70ba0da911..d45e93f328185f869c2b3af4cc832db280d14428 100644 (file)
--- a/histogram.py
+++ b/histogram.py
@@ -85,8 +85,8 @@ class SimpleHistogram(Generic[T]):
             return txt
 
         max_label_width: Optional[int] = None
-        lowest_start: int = None
-        highest_end: int = None
+        lowest_start: Optional[int] = None
+        highest_end: Optional[int] = None
         for bucket in sorted(self.buckets, key=lambda x: x[0]):
             start = bucket[0]
             if lowest_start is None: