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gh-59598: Ignore leading whitespace in JSONDecoder.raw_decode #153018

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gh-59598: Ignore leading whitespace in JSONDecoder.raw_decode #153018

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6 changes: 3 additions & 3 deletions Lib/json/decoder.py
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Original file line number Diff line number Diff line change
Expand Up @@ -355,13 +355,13 @@ def decode(self, s, _w=WHITESPACE.match):
containing a JSON document).

"""
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
obj, end = self.raw_decode(s)
end = _w(s, end).end()
if end != len(s):
raise JSONDecodeError("Extra data", s, end)
return obj

def raw_decode(self, s, idx=0):
def raw_decode(self, s, idx=0, _w=WHITESPACE.match):
"""Decode a JSON document from ``s`` (a ``str`` beginning with
a JSON document) and return a 2-tuple of the Python
representation and the index in ``s`` where the document ended.
Expand All @@ -371,7 +371,7 @@ def raw_decode(self, s, idx=0):

"""
try:
obj, end = self.scan_once(s, idx)
obj, end = self.scan_once(s, idx=_w(s, idx).end())
except StopIteration as err:
raise JSONDecodeError("Expecting value", s, err.value) from None
return obj, end
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