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Revert "bpo-44717: improve AttributeError on circular imports of submodules (GH-27299)" (GH-27331)

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This reverts commit 8072a1181d.
This commit is contained in:
Pablo Galindo Salgado 2021-07-24 14:33:03 +01:00 • committed by GitHub
parent c8362314cc
commit 3eae8f20d7
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8 changed files with 1735 additions and 1808 deletions
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15
Lib/importlib/_bootstrap.py
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@ -361,7 +361,6 @@ class ModuleSpec:
self.origin = origin
self.loader_state = loader_state
self.submodule_search_locations = [] if is_package else None
self._uninitialized_submodules = []
# file-location attributes
self._set_fileattr = False
@ -988,7 +987,6 @@ _ERR_MSG = _ERR_MSG_PREFIX + '{!r}'
def _find_and_load_unlocked(name, import_):
path = None
parent = name.rpartition('.')[0]
parent_spec = None
if parent:
if parent not in sys.modules:
_call_with_frames_removed(import_, parent)
@ -1001,24 +999,15 @@ def _find_and_load_unlocked(name, import_):
except AttributeError:
msg = (_ERR_MSG + '; {!r} is not a package').format(name, parent)
raise ModuleNotFoundError(msg, name=name) from None
parent_spec = parent_module.__spec__
child = name.rpartition('.')[2]
spec = _find_spec(name, path)
if spec is None:
raise ModuleNotFoundError(_ERR_MSG.format(name), name=name)
else:
if parent_spec:
# Temporarily add child we are currently importing to parent's
# _uninitialized_submodules for circular import tracking.
parent_spec._uninitialized_submodules.append(child)
try:
module = _load_unlocked(spec)
finally:
if parent_spec:
parent_spec._uninitialized_submodules.pop()
module = _load_unlocked(spec)
if parent:
# Set the module as an attribute on its parent.
parent_module = sys.modules[parent]
child = name.rpartition('.')[2]
try:
setattr(parent_module, child, module)
except AttributeError: