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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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6
Lib/pickle.py
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@ -269,7 +269,7 @@ def _getattribute(obj, name):
obj = getattr(obj, subpath)
except AttributeError:
raise AttributeError("Can't get attribute {!r} on {!r}"
.format(name, obj))
.format(name, obj)) from None
return obj, parent
def whichmodule(obj, name):
@ -919,7 +919,7 @@ class _Pickler:
except (ImportError, KeyError, AttributeError):
raise PicklingError(
"Can't pickle %r: it's not found as %s.%s" %
(obj, module_name, name))
(obj, module_name, name)) from None
else:
if obj2 is not obj:
raise PicklingError(
@ -964,7 +964,7 @@ class _Pickler:
except UnicodeEncodeError:
raise PicklingError(
"can't pickle global identifier '%s.%s' using "
"pickle protocol %i" % (module, name, self.proto))
"pickle protocol %i" % (module, name, self.proto)) from None
self.memoize(obj)