Allow annotation negative subtypes #248

Lucas-Mc · Lucas-Mc · commit bb6f89346f03 · 2021-03-31T09:30:48.000-04:00
diff --git a/wfdb/io/annotation.py b/wfdb/io/annotation.py
@@ -474,8 +474,8 @@ def check_field(self, field):
         # The C WFDB library stores num/sub/chan as chars.
         elif field == 'subtype':
             # signed character
-            if min(self.subtype) < 0 or max(self.subtype) >127:
-                raise ValueError("The 'subtype' field must only contain non-negative integers up to 127")
+            if min(self.subtype) < -128 or max(self.subtype) > 127:
+                raise ValueError("The 'subtype' field must only contain integers from -128 to 127")
         elif field == 'chan':
             # un_signed character
             if min(self.chan) < 0 or max(self.chan) >255:
