pythonVSCode/pythonFiles/rope/base/pyobjects.py at master · privat1/pythonVSCode · GitHub

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from rope.base.fscommands import _decode_data

from rope.base import ast, exceptions, utils

class PyObject(object):

def __init__(self, type_):

if type_ is None:

type_ = self

self.type = type_

def get_attributes(self):

if self.type is self:

return {}

return self.type.get_attributes()

def get_attribute(self, name):

if name not in self.get_attributes():

raise exceptions.AttributeNotFoundError(

'Attribute %s not found' % name)

return self.get_attributes()[name]

def get_type(self):

return self.type

def __getitem__(self, key):

"""The same as ``get_attribute(key)``"""

return self.get_attribute(key)

def __contains__(self, key):

"""The same as ``key in self.get_attributes()``"""

return key in self.get_attributes()

def __eq__(self, obj):

"""Check the equality of two `PyObject`\s

Currently it is assumed that instances (the direct instances

of `PyObject`, not the instances of its subclasses) are equal

if their types are equal. For every other object like

defineds or builtins rope assumes objects are reference

objects and their identities should match.

"""

if self.__class__ != obj.__class__:

return False

if type(self) == PyObject:

if self is not self.type:

return self.type == obj.type

else:

return self.type is obj.type

return self is obj

def __ne__(self, obj):

return not self.__eq__(obj)

def __hash__(self):

"""See docs for `__eq__()` method"""

if type(self) == PyObject and self != self.type:

return hash(self.type) + 1

else:

return super(PyObject, self).__hash__()

def __iter__(self):

"""The same as ``iter(self.get_attributes())``"""

return iter(self.get_attributes())

_types = None

_unknown = None

@staticmethod

def _get_base_type(name):

if PyObject._types is None:

PyObject._types = {}

base_type = PyObject(None)

PyObject._types['Type'] = base_type

PyObject._types['Module'] = PyObject(base_type)

PyObject._types['Function'] = PyObject(base_type)

PyObject._types['Unknown'] = PyObject(base_type)

return PyObject._types[name]

def get_base_type(name):

"""Return the base type with name `name`.

The base types are 'Type', 'Function', 'Module' and 'Unknown'. It

was used to check the type of a `PyObject` but currently its use

is discouraged. Use classes defined in this module instead.

For example instead of

``pyobject.get_type() == get_base_type('Function')`` use

``isinstance(pyobject, AbstractFunction)``.

You can use `AbstractClass` for classes, `AbstractFunction` for

functions, and `AbstractModule` for modules. You can also use

`PyFunction` and `PyClass` for testing if an object is

defined somewhere and rope can access its source. These classes

provide more methods.

"""

return PyObject._get_base_type(name)

def get_unknown():

"""Return a pyobject whose type is unknown

Note that two unknown objects are equal. So for example you can

write::

if pyname.get_object() == get_unknown():

print 'cannot determine what this pyname holds'

Rope could have used `None` for indicating unknown objects but

we had to check that in many places. So actually this method

returns a null object.

"""

if PyObject._unknown is None:

PyObject._unknown = PyObject(get_base_type('Unknown'))

return PyObject._unknown

class AbstractClass(PyObject):

def __init__(self):

super(AbstractClass, self).__init__(get_base_type('Type'))

def get_name(self):

pass

def get_doc(self):

pass

def get_superclasses(self):

return []

class AbstractFunction(PyObject):

def __init__(self):

super(AbstractFunction, self).__init__(get_base_type('Function'))

def get_name(self):

pass

def get_doc(self):

pass

def get_param_names(self, special_args=True):

return []

def get_returned_object(self, args):

return get_unknown()

class AbstractModule(PyObject):

def __init__(self, doc=None):

super(AbstractModule, self).__init__(get_base_type('Module'))

def get_doc(self):

pass

def get_resource(self):

pass

class PyDefinedObject(object):

"""Python defined names that rope can access their sources"""

def __init__(self, pycore, ast_node, parent):

self.pycore = pycore

self.ast_node = ast_node

self.scope = None

self.parent = parent

self.structural_attributes = None

self.concluded_attributes = self.get_module()._get_concluded_data()

self.attributes = self.get_module()._get_concluded_data()

self.defineds = None

visitor_class = None

@utils.prevent_recursion(lambda: {})

def _get_structural_attributes(self):

if self.structural_attributes is None:

self.structural_attributes = self._create_structural_attributes()

return self.structural_attributes

@utils.prevent_recursion(lambda: {})

def _get_concluded_attributes(self):

if self.concluded_attributes.get() is None:

self._get_structural_attributes()

self.concluded_attributes.set(self._create_concluded_attributes())

return self.concluded_attributes.get()

def get_attributes(self):

if self.attributes.get() is None:

result = dict(self._get_concluded_attributes())

result.update(self._get_structural_attributes())

self.attributes.set(result)

return self.attributes.get()

def get_attribute(self, name):

if name in self._get_structural_attributes():

return self._get_structural_attributes()[name]

if name in self._get_concluded_attributes():

return self._get_concluded_attributes()[name]

raise exceptions.AttributeNotFoundError('Attribute %s not found' %

name)

def get_scope(self):

if self.scope is None:

self.scope = self._create_scope()

return self.scope

def get_module(self):

current_object = self

while current_object.parent is not None:

current_object = current_object.parent

return current_object

def get_doc(self):

if len(self.get_ast().body) > 0:

expr = self.get_ast().body[0]

if isinstance(expr, ast.Expr) and \

isinstance(expr.value, ast.Str):

docstring = expr.value.s

coding = self.get_module().coding

return _decode_data(docstring, coding)

def _get_defined_objects(self):

if self.defineds is None:

self._get_structural_attributes()

return self.defineds

def _create_structural_attributes(self):

if self.visitor_class is None:

return {}

new_visitor = self.visitor_class(self.pycore, self)

for child in ast.get_child_nodes(self.ast_node):

ast.walk(child, new_visitor)

self.defineds = new_visitor.defineds

return new_visitor.names

def _create_concluded_attributes(self):

return {}

def get_ast(self):

return self.ast_node

def _create_scope(self):

pass

class PyFunction(PyDefinedObject, AbstractFunction):

"""Only a placeholder"""

class PyClass(PyDefinedObject, AbstractClass):

"""Only a placeholder"""

class _ConcludedData(object):

def __init__(self):

self.data_ = None

def set(self, data):

self.data_ = data

def get(self):

return self.data_

data = property(get, set)

def _invalidate(self):

self.data = None

def __str__(self):

return '<' + str(self.data) + '>'

class _PyModule(PyDefinedObject, AbstractModule):

def __init__(self, pycore, ast_node, resource):

self.resource = resource

self.concluded_data = []

AbstractModule.__init__(self)

PyDefinedObject.__init__(self, pycore, ast_node, None)

def _get_concluded_data(self):

new_data = _ConcludedData()

self.concluded_data.append(new_data)

return new_data

def _forget_concluded_data(self):

for data in self.concluded_data:

data._invalidate()

def get_resource(self):

return self.resource

class PyModule(_PyModule):

"""Only a placeholder"""

class PyPackage(_PyModule):

"""Only a placeholder"""

class IsBeingInferredError(exceptions.RopeError):

pass

pythonVSCode/pythonFiles/rope/base/pyobjects.py at master · privat1/pythonVSCode · GitHub

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