Add _codecs.charmap_build

coolreader18 · coolreader18 · commit bca685201f19 · 2020-04-11T16:40:08.000-05:00
diff --git a/vm/Lib/python_builtins/_codecs.py b/vm/Lib/python_builtins/_codecs.py
@@ -239,6 +239,9 @@ def charmap_encode(obj, errors='strict', mapping='latin-1'):
     res = bytes(res)
     return res, len(res)
 
+def charmap_build(s):
+    return {ord(c): i for i, c in enumerate(s)}
+
 if sys.maxunicode == 65535:
     unicode_bytes = 2
 else:
