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-rw-r--r--scripts/decodetree.py9
1 files changed, 6 insertions, 3 deletions
diff --git a/scripts/decodetree.py b/scripts/decodetree.py
index 47aa9caf6d..4637b633e7 100644
--- a/scripts/decodetree.py
+++ b/scripts/decodetree.py
@@ -20,6 +20,7 @@
 # See the syntax and semantics in docs/devel/decodetree.rst.
 #
 
+import io
 import os
 import re
 import sys
@@ -1304,7 +1305,7 @@ def main():
 
     for filename in args:
         input_file = filename
-        f = open(filename, 'r')
+        f = open(filename, 'rt', encoding='utf-8')
         parse_file(f, toppat)
         f.close()
 
@@ -1324,9 +1325,11 @@ def main():
         prop_size(stree)
 
     if output_file:
-        output_fd = open(output_file, 'w')
+        output_fd = open(output_file, 'wt', encoding='utf-8')
     else:
-        output_fd = sys.stdout
+        output_fd = io.TextIOWrapper(sys.stdout.buffer,
+                                     encoding=sys.stdout.encoding,
+                                     errors="ignore")
 
     output_autogen()
     for n in sorted(arguments.keys()):