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#18958: Improve error message for json.load(s) while passing a string that starts with a UTF-8 BOM.

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Ezio Melotti 2013-10-21 02:10:55 +03:00
parent a0e768ccc2
commit 566a2be95c
3 changed files with 19 additions and 0 deletions
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2
Lib/json/__init__.py
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@ -313,6 +313,8 @@ def loads(s, encoding=None, cls=None, object_hook=None, parse_float=None,
if not isinstance(s, str):
raise TypeError('the JSON object must be str, not {!r}'.format(
s.__class__.__name__))
if s.startswith(u'\ufeff'):
raise ValueError("Unexpected UTF-8 BOM (decode using utf-8-sig)")
if (cls is None and object_hook is None and
parse_int is None and parse_float is None and
parse_constant is None and object_pairs_hook is None and not kw):