def igetattr(self, name, context=None):
"""inferred getattr"""
if not context:
context = InferenceContext()
try:
context.lookupname = name
# avoid recursively inferring the same attr on the same class
if context.push(self._proxied):
raise InferenceError(
message="Cannot infer the same attribute again",
node=self,
context=context,
)
# XXX frame should be self._proxied, or not ?
get_attr = self.getattr(name, context, lookupclass=False)
yield from _infer_stmts(self._wrap_attr(get_attr, context),
context,
frame=self)
except AttributeInferenceError:
try:
# fallback to class.igetattr since it has some logic to handle
# descriptors
# But only if the _proxied is the Class.
if self._proxied.__class__.__name__ != "ClassDef":
raise
attrs = self._proxied.igetattr(name,
context,
class_context=False)
yield from self._wrap_attr(attrs, context)
except AttributeInferenceError as error:
raise InferenceError(**vars(error)) from error
def _infer_stmts(stmts, context, frame=None):
"""Return an iterator on statements inferred by each statement in *stmts*."""
inferred = False
if context is not None:
name = context.lookupname
context = context.clone()
else:
name = None
context = InferenceContext()
for stmt in stmts:
if stmt is Uninferable:
yield stmt
inferred = True
continue
context.lookupname = stmt._infer_name(frame, name)
try:
for inf in stmt.infer(context=context):
yield inf
inferred = True
except NameInferenceError:
continue
except InferenceError:
yield Uninferable
inferred = True
if not inferred:
raise InferenceError(
"Inference failed for all members of {stmts!r}.",
stmts=stmts,
frame=frame,
context=context,
)