def visit_tuple(self, node, parent):
"""visit a Tuple node by returning a fresh instance of it"""
newnode = new.Tuple()
_lineno_parent(node, newnode, parent)
newnode.elts = [self.visit(child, newnode) for child in node.elts]
newnode.set_line_info(newnode.last_child())
return newnode
def visit_tuple(self, node, parent, assign_ctx=None):
"""visit a Tuple node by returning a fresh instance of it"""
newnode = new.Tuple()
_lineno_parent(node, newnode, parent)
newnode.elts = [self.visit(child, newnode, assign_ctx)
for child in node.elts]
return newnode
def visit_tuple(self, node, parent):
"""visit a Tuple node by returning a fresh instance of it"""
context = self._get_context(node)
newnode = nodes.Tuple(
ctx=context, lineno=node.lineno, col_offset=node.col_offset, parent=parent
)
newnode.postinit([self.visit(child, newnode) for child in node.elts])
return newnode
def _getattr(self, name, *args, **kw):
try:
return Module_getattr(self, name, *args, **kw)
except NotFoundError, e:
if self.name.startswith('erp5.'):
raise
real_module = __import__(self.name, fromlist=[self.name], level=0)
try:
attr = getattr(real_module, name)
except AttributeError:
raise e
# REQUEST object (or any object non acquisition-wrapped)
if (isinstance(attr, str)
and attr == '<Special Object Used to Force Acquisition>'):
raise e
try:
origin_module_name = attr.__module__
except AttributeError:
from astroid import nodes
if isinstance(attr, dict):
ast = nodes.Dict(attr)
elif isinstance(attr, list):
ast = nodes.List(attr)
elif isinstance(attr, tuple):
ast = nodes.Tuple(attr)
elif isinstance(attr, set):
ast = nodes.Set(attr)
else:
try:
ast = nodes.Const(attr)
except Exception:
raise e
else:
if self.name == origin_module_name:
raise
# ast_from_class() actually works for any attribute of a Module
try:
ast = MANAGER.ast_from_class(attr)
except AstroidBuildingException:
raise e
self.locals[name] = [ast]
return [ast]
def infer_argument(self, funcnode, name, context):
"""infer a function argument value according to the call context
Arguments:
funcnode: The function being called.
name: The name of the argument whose value is being inferred.
context: Inference context object
"""
if name in self.duplicated_keywords:
raise exceptions.InferenceError(
"The arguments passed to {func!r} "
" have duplicate keywords.",
call_site=self,
func=funcnode,
arg=name,
context=context,
)
# Look into the keywords first, maybe it's already there.
try:
return self.keyword_arguments[name].infer(context)
except KeyError:
pass
# Too many arguments given and no variable arguments.
if len(self.positional_arguments) > len(funcnode.args.args):
if not funcnode.args.vararg and not funcnode.args.posonlyargs:
raise exceptions.InferenceError(
"Too many positional arguments "
"passed to {func!r} that does "
"not have *args.",
call_site=self,
func=funcnode,
arg=name,
context=context,
)
positional = self.positional_arguments[:len(funcnode.args.args)]
vararg = self.positional_arguments[len(funcnode.args.args):]
argindex = funcnode.args.find_argname(name)[0]
kwonlyargs = {arg.name for arg in funcnode.args.kwonlyargs}
kwargs = {
key: value
for key, value in self.keyword_arguments.items()
if key not in kwonlyargs
}
# If there are too few positionals compared to
# what the function expects to receive, check to see
# if the missing positional arguments were passed
# as keyword arguments and if so, place them into the
# positional args list.
if len(positional) < len(funcnode.args.args):
for func_arg in funcnode.args.args:
if func_arg.name in kwargs:
arg = kwargs.pop(func_arg.name)
positional.append(arg)
if argindex is not None:
# 2. first argument of instance/class method
if argindex == 0 and funcnode.type in ("method", "classmethod"):
if context.boundnode is not None:
boundnode = context.boundnode
else:
# XXX can do better ?
boundnode = funcnode.parent.frame()
if isinstance(boundnode, nodes.ClassDef):
# Verify that we're accessing a method
# of the metaclass through a class, as in
# `cls.metaclass_method`. In this case, the
# first argument is always the class.
method_scope = funcnode.parent.scope()
if method_scope is boundnode.metaclass():
return iter((boundnode, ))
if funcnode.type == "method":
if not isinstance(boundnode, bases.Instance):
boundnode = boundnode.instantiate_class()
return iter((boundnode, ))
if funcnode.type == "classmethod":
return iter((boundnode, ))
# if we have a method, extract one position
# from the index, so we'll take in account
# the extra parameter represented by `self` or `cls`
if funcnode.type in ("method", "classmethod"):
argindex -= 1
# 2. search arg index
try:
return self.positional_arguments[argindex].infer(context)
except IndexError:
pass
if funcnode.args.kwarg == name:
# It wants all the keywords that were passed into
# the call site.
if self.has_invalid_keywords():
raise exceptions.InferenceError(
"Inference failed to find values for all keyword arguments "
"to {func!r}: {unpacked_kwargs!r} doesn't correspond to "
"{keyword_arguments!r}.",
keyword_arguments=self.keyword_arguments,
unpacked_kwargs=self._unpacked_kwargs,
call_site=self,
func=funcnode,
arg=name,
context=context,
)
kwarg = nodes.Dict(
lineno=funcnode.args.lineno,
col_offset=funcnode.args.col_offset,
parent=funcnode.args,
)
kwarg.postinit([(nodes.const_factory(key), value)
for key, value in kwargs.items()])
return iter((kwarg, ))
if funcnode.args.vararg == name:
# It wants all the args that were passed into
# the call site.
if self.has_invalid_arguments():
raise exceptions.InferenceError(
"Inference failed to find values for all positional "
"arguments to {func!r}: {unpacked_args!r} doesn't "
"correspond to {positional_arguments!r}.",
positional_arguments=self.positional_arguments,
unpacked_args=self._unpacked_args,
call_site=self,
func=funcnode,
arg=name,
context=context,
)
args = nodes.Tuple(
lineno=funcnode.args.lineno,
col_offset=funcnode.args.col_offset,
parent=funcnode.args,
)
args.postinit(vararg)
return iter((args, ))
# Check if it's a default parameter.
try:
return funcnode.args.default_value(name).infer(context)
except exceptions.NoDefault:
pass
raise exceptions.InferenceError(
"No value found for argument {arg} to {func!r}",
call_site=self,
func=funcnode,
arg=name,
context=context,
)
def attr_args(self) -> nodes.Tuple:
return nodes.Tuple(parent=self._instance)
def infer_argument(self, funcnode, name, context):
"""infer a function argument value according to the call context"""
if name in self.duplicated_keywords:
raise exceptions.InferenceError(name)
# Look into the keywords first, maybe it's already there.
try:
return self.keyword_arguments[name].infer(context)
except KeyError:
pass
# Too many arguments given and no variable arguments.
if len(self.positional_arguments) > len(funcnode.args.args):
if not funcnode.args.vararg:
raise exceptions.InferenceError(name)
positional = self.positional_arguments[:len(funcnode.args.args)]
vararg = self.positional_arguments[len(funcnode.args.args):]
argindex = funcnode.args.find_argname(name)[0]
kwonlyargs = set(arg.name for arg in funcnode.args.kwonlyargs)
kwargs = {
key: value
for key, value in self.keyword_arguments.items()
if key not in kwonlyargs
}
# If there are too few positionals compared to
# what the function expects to receive, check to see
# if the missing positional arguments were passed
# as keyword arguments and if so, place them into the
# positional args list.
if len(positional) < len(funcnode.args.args):
for func_arg in funcnode.args.args:
if func_arg.name in kwargs:
arg = kwargs.pop(func_arg.name)
positional.append(arg)
if argindex is not None:
# 2. first argument of instance/class method
if argindex == 0 and funcnode.type in ('method', 'classmethod'):
if context.boundnode is not None:
boundnode = context.boundnode
else:
# XXX can do better ?
boundnode = funcnode.parent.frame()
if funcnode.type == 'method':
if not isinstance(boundnode, bases.Instance):
boundnode = bases.Instance(boundnode)
return iter((boundnode, ))
if funcnode.type == 'classmethod':
return iter((boundnode, ))
# if we have a method, extract one position
# from the index, so we'll take in account
# the extra parameter represented by `self` or `cls`
if funcnode.type in ('method', 'classmethod'):
argindex -= 1
# 2. search arg index
try:
return self.positional_arguments[argindex].infer(context)
except IndexError:
pass
if funcnode.args.kwarg == name:
# It wants all the keywords that were passed into
# the call site.
if self.has_invalid_keywords():
raise exceptions.InferenceError
kwarg = nodes.Dict()
kwarg.lineno = funcnode.args.lineno
kwarg.col_offset = funcnode.args.col_offset
kwarg.parent = funcnode.args
items = [(nodes.const_factory(key), value)
for key, value in kwargs.items()]
kwarg.items = items
return iter((kwarg, ))
elif funcnode.args.vararg == name:
# It wants all the args that were passed into
# the call site.
if self.has_invalid_arguments():
raise exceptions.InferenceError
args = nodes.Tuple()
args.lineno = funcnode.args.lineno
args.col_offset = funcnode.args.col_offset
args.parent = funcnode.args
args.elts = vararg
return iter((args, ))
# Check if it's a default parameter.
try:
return funcnode.args.default_value(name).infer(context)
except exceptions.NoDefault:
pass
raise exceptions.InferenceError(name)
def tuple_node(draw, elt=const_node, **kwargs):
"""Return a Tuple node with elements drawn from elt."""
elts = draw(hs.lists(elt(), **kwargs, min_size=1))
node = nodes.Tuple()
node.postinit(elts)
return node
