Class UnknownInstanceInternal

A class representing a value that has a known class, but no other information

Import path

import semmle.python.objects.Instances

Direct supertypes

Indirect supertypes

TObject

Predicates

attribute	Holds if the result of getting the attribute `name` is `value` and that `value` comes from `origin`. Note this is not the same as class lookup. For example for an object `x` the attribute `name` (`x.name`) may refer to a bound-method, an attribute of the instance, or an attribute of the class.
attributesUnknown	Holds if the attributes of this object are wholly or partly unknowable
binds	Holds if attribute lookup on this object may “bind” `instance` to `descriptor`. Here “bind” means that `instance` is passed to the `descriptor.__get__()` method at runtime. The term “bind” is used as this most likely results in a bound-method.
booleanValue	Gets the boolean value of this object. This may be both true and false if the “object” represents a set of possible objects.
callResult	Holds if `obj` is the result of calling `this` and `origin` is the origin of `obj`.
callResult	Holds if `obj` is the result of calling `this` and `origin` is the origin of `obj` with callee context `callee`.
calleeAndOffset	Holds if the function `scope` is called when this object is called and `paramOffset` is the difference from the parameter position and the argument position. For a normal function `paramOffset` is 0. For classes and bound-methods it is 1. Used by points-to to help determine flow from arguments to parameters.
contextSensitiveCallee
descriptorGetClass	Holds if the result of attribute access on the class holding this descriptor is `value`, originating at `origin` For example, although `T.__dict__['name'] = classmethod(f)`, `T.name` is a bound-method, binding `f` and `T`
descriptorGetInstance	Holds if the result of attribute access on an instance of a class holding this descriptor is `value`, originating at `origin` For example, with `T.__dict__['name'] = classmethod(f)`, `T().name` is a bound-method, binding `f` and `T`
getBuiltin	Gets the `Builtin` for this object, if any. All objects (except unknown and undefined values) should return exactly one result for either this method or `getOrigin()`.
getClass	Gets the class of this object.
getClassDeclaration	Gets the class declaration for this object, if it is a declared class.
getIterNext	Gets the ‘object’ resulting from iterating over this object. Used in the context `for i in this:`. The result is the ‘object’ assigned to `i`.
getName	Gets the name of this of this object if it has a meaningful name. Note that the name of an object is not necessarily the name by which it is called For example the function named `posixpath.join` will be called `os.path.join`.
getOrigin	Gets a control flow node that represents the source origin of this objects. All objects (except unknown and undefined values) should return exactly one result for either this method or `getBuiltin()`.
intValue	Gets the integer value of things that have integer values and whose integer value is tracked. That is, some ints, mainly small numbers, and bools.
introducedAt	Holds if this object is introduced into the code base at `node` given the `context` This means that `node`, in `context`, points-to this object, but the object has not flowed there from anywhere else. Examples: * The object `None` is “introduced” by the keyword “None”. * A bound method would be “introduced” when relevant attribute on an instance is accessed. In `x = X(); x.m` `x.m` introduces the bound method.
isClass	True if this “object” is a class. That is, its class inherits from `type`
isDescriptor	Holds if this object is a descriptor. Holds, for example, for functions and properties and not for integers.
isNotSubscriptedType
length	Gets the length of the sequence that this “object” represents. Always returns a value for a sequence, will be -1 if the object has no fixed length.
notTestableForEquality	True if this “object” can be meaningfully analyzed to determine the boolean value of equality tests on it. For example, `None` or `int` can be, but `int()` or an unknown string cannot.
strValue	Gets the string value of things that have string values. That is, strings.
subscriptUnknown	Holds if the result of subscripting this object are wholly or partly unknowable
toString	Gets a textual representation of this element.
useOriginAsLegacyObject	Holds if this ‘object’ represents an entity that should be exposed to the legacy points_to API This should hold for almost all objects that do not have an underlying DB object representing their source, for example `super` objects and bound-method. This should not hold for objects that are inferred to exists by an import statements or the like, but which aren’t in the database.

Inherited predicates

functionAndOffset	Holds if the object `function` is called when this object is called and `paramOffset` is the difference from the parameter position and the argument position. For a normal function `paramOffset` is 0. For classes and bound-methods it is 1. This is used to implement the `CallableValue` public API.	from ObjectInternal
getSource	For backwards compatibility shim – Not all objects have a “source”. Objects (except unknown and undefined values) should attempt to return exactly one result for this method.	from ObjectInternal
hasAttribute	Holds if this value has the attribute `name`	from ObjectInternal
isBuiltin		from ObjectInternal