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bpo-29762: More use "raise from None". (#569)

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This hides unwanted implementation details from tracebacks.
This commit is contained in:
Serhiy Storchaka 2017-04-05 09:37:24 +03:00 • committed by GitHub
parent 43ba8861e0
commit 5affd23e6f
30 changed files with 50 additions and 48 deletions
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3
Lib/json/decoder.py
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@ -103,7 +103,8 @@ def py_scanstring(s, end, strict=True,
try:
esc = s[end]
except IndexError:
raise JSONDecodeError("Unterminated string starting at", s, begin)
raise JSONDecodeError("Unterminated string starting at",
s, begin) from None
# If not a unicode escape sequence, must be in the lookup table
if esc != 'u':
try: