diff options
Diffstat (limited to 'venv/Lib/site-packages/astroid/exceptions.py')
| -rw-r--r-- | venv/Lib/site-packages/astroid/exceptions.py | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/venv/Lib/site-packages/astroid/exceptions.py b/venv/Lib/site-packages/astroid/exceptions.py new file mode 100644 index 0000000..7e9d655 --- /dev/null +++ b/venv/Lib/site-packages/astroid/exceptions.py @@ -0,0 +1,230 @@ +# Copyright (c) 2007, 2009-2010, 2013 LOGILAB S.A. (Paris, FRANCE) <contact@logilab.fr> +# Copyright (c) 2014 Google, Inc. +# Copyright (c) 2015-2018 Claudiu Popa <pcmanticore@gmail.com> +# Copyright (c) 2015-2016 Ceridwen <ceridwenv@gmail.com> +# Copyright (c) 2016 Derek Gustafson <degustaf@gmail.com> +# Copyright (c) 2018 Bryce Guinta <bryce.paul.guinta@gmail.com> + +# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html +# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER + +"""this module contains exceptions used in the astroid library +""" +from astroid import util + + +class AstroidError(Exception): + """base exception class for all astroid related exceptions + + AstroidError and its subclasses are structured, intended to hold + objects representing state when the exception is thrown. Field + values are passed to the constructor as keyword-only arguments. + Each subclass has its own set of standard fields, but use your + best judgment to decide whether a specific exception instance + needs more or fewer fields for debugging. Field values may be + used to lazily generate the error message: self.message.format() + will be called with the field names and values supplied as keyword + arguments. + """ + + def __init__(self, message="", **kws): + super(AstroidError, self).__init__(message) + self.message = message + for key, value in kws.items(): + setattr(self, key, value) + + def __str__(self): + return self.message.format(**vars(self)) + + +class AstroidBuildingError(AstroidError): + """exception class when we are unable to build an astroid representation + + Standard attributes: + modname: Name of the module that AST construction failed for. + error: Exception raised during construction. + """ + + def __init__(self, message="Failed to import module {modname}.", **kws): + super(AstroidBuildingError, self).__init__(message, **kws) + + +class AstroidImportError(AstroidBuildingError): + """Exception class used when a module can't be imported by astroid.""" + + +class TooManyLevelsError(AstroidImportError): + """Exception class which is raised when a relative import was beyond the top-level. + + Standard attributes: + level: The level which was attempted. + name: the name of the module on which the relative import was attempted. + """ + + level = None + name = None + + def __init__( + self, + message="Relative import with too many levels " "({level}) for module {name!r}", + **kws + ): + super(TooManyLevelsError, self).__init__(message, **kws) + + +class AstroidSyntaxError(AstroidBuildingError): + """Exception class used when a module can't be parsed.""" + + +class NoDefault(AstroidError): + """raised by function's `default_value` method when an argument has + no default value + + Standard attributes: + func: Function node. + name: Name of argument without a default. + """ + + func = None + name = None + + def __init__(self, message="{func!r} has no default for {name!r}.", **kws): + super(NoDefault, self).__init__(message, **kws) + + +class ResolveError(AstroidError): + """Base class of astroid resolution/inference error. + + ResolveError is not intended to be raised. + + Standard attributes: + context: InferenceContext object. + """ + + context = None + + +class MroError(ResolveError): + """Error raised when there is a problem with method resolution of a class. + + Standard attributes: + mros: A sequence of sequences containing ClassDef nodes. + cls: ClassDef node whose MRO resolution failed. + context: InferenceContext object. + """ + + mros = () + cls = None + + def __str__(self): + mro_names = ", ".join( + "({})".format(", ".join(b.name for b in m)) for m in self.mros + ) + return self.message.format(mros=mro_names, cls=self.cls) + + +class DuplicateBasesError(MroError): + """Error raised when there are duplicate bases in the same class bases.""" + + +class InconsistentMroError(MroError): + """Error raised when a class's MRO is inconsistent.""" + + +class SuperError(ResolveError): + """Error raised when there is a problem with a *super* call. + + Standard attributes: + *super_*: The Super instance that raised the exception. + context: InferenceContext object. + """ + + super_ = None + + def __str__(self): + return self.message.format(**vars(self.super_)) + + +class InferenceError(ResolveError): + """raised when we are unable to infer a node + + Standard attributes: + node: The node inference was called on. + context: InferenceContext object. + """ + + node = None + context = None + + def __init__(self, message="Inference failed for {node!r}.", **kws): + super(InferenceError, self).__init__(message, **kws) + + +# Why does this inherit from InferenceError rather than ResolveError? +# Changing it causes some inference tests to fail. +class NameInferenceError(InferenceError): + """Raised when a name lookup fails, corresponds to NameError. + + Standard attributes: + name: The name for which lookup failed, as a string. + scope: The node representing the scope in which the lookup occurred. + context: InferenceContext object. + """ + + name = None + scope = None + + def __init__(self, message="{name!r} not found in {scope!r}.", **kws): + super(NameInferenceError, self).__init__(message, **kws) + + +class AttributeInferenceError(ResolveError): + """Raised when an attribute lookup fails, corresponds to AttributeError. + + Standard attributes: + target: The node for which lookup failed. + attribute: The attribute for which lookup failed, as a string. + context: InferenceContext object. + """ + + target = None + attribute = None + + def __init__(self, message="{attribute!r} not found on {target!r}.", **kws): + super(AttributeInferenceError, self).__init__(message, **kws) + + +class UseInferenceDefault(Exception): + """exception to be raised in custom inference function to indicate that it + should go back to the default behaviour + """ + + +class _NonDeducibleTypeHierarchy(Exception): + """Raised when is_subtype / is_supertype can't deduce the relation between two types.""" + + +class AstroidIndexError(AstroidError): + """Raised when an Indexable / Mapping does not have an index / key.""" + + +class AstroidTypeError(AstroidError): + """Raised when a TypeError would be expected in Python code.""" + + +class InferenceOverwriteError(AstroidError): + """Raised when an inference tip is overwritten + + Currently only used for debugging. + """ + + +# Backwards-compatibility aliases +OperationError = util.BadOperationMessage +UnaryOperationError = util.BadUnaryOperationMessage +BinaryOperationError = util.BadBinaryOperationMessage + +SuperArgumentTypeError = SuperError +UnresolvableName = NameInferenceError +NotFoundError = AttributeInferenceError +AstroidBuildingException = AstroidBuildingError |