pythonVSCode/pythonFiles/jedi/api/classes.py at master · Jeaninecar/pythonVSCode · GitHub

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"""

The :mod:`jedi.api.classes` module contains the return classes of the API.

These classes are the much bigger part of the whole API, because they contain

the interesting information about completion and goto operations.

"""

import re

from parso.cache import parser_cache

from parso.python.tree import search_ancestor

from jedi._compatibility import u

from jedi import settings

from jedi.evaluate.utils import ignored, unite

from jedi.cache import memoize_method

from jedi.evaluate import imports

from jedi.evaluate import compiled

from jedi.evaluate.filters import ParamName

from jedi.evaluate.imports import ImportName

from jedi.evaluate.context import instance

from jedi.evaluate.context import ClassContext, FunctionContext, FunctionExecutionContext

from jedi.api.keywords import KeywordName

def _sort_names_by_start_pos(names):

return sorted(names, key=lambda s: s.start_pos or (0, 0))

def defined_names(evaluator, context):

"""

List sub-definitions (e.g., methods in class).

:type scope: Scope

:rtype: list of Definition

"""

filter = next(context.get_filters(search_global=True))

names = [name for name in filter.values()]

return [Definition(evaluator, n) for n in _sort_names_by_start_pos(names)]

class BaseDefinition(object):

_mapping = {

'posixpath': 'os.path',

'riscospath': 'os.path',

'ntpath': 'os.path',

'os2emxpath': 'os.path',

'macpath': 'os.path',

'genericpath': 'os.path',

'posix': 'os',

'_io': 'io',

'_functools': 'functools',

'_sqlite3': 'sqlite3',

'__builtin__': '',

'builtins': '',

}

_tuple_mapping = dict((tuple(k.split('.')), v) for (k, v) in {

'argparse._ActionsContainer': 'argparse.ArgumentParser',

}.items())

def __init__(self, evaluator, name):

self._evaluator = evaluator

self._name = name

"""

An instance of :class:`parso.reprsentation.Name` subclass.

"""

self.is_keyword = isinstance(self._name, KeywordName)

# generate a path to the definition

self._module = name.get_root_context()

if self.in_builtin_module():

self.module_path = None

else:

self.module_path = self._module.py__file__()

"""Shows the file path of a module. e.g. ``/usr/lib/python2.7/os.py``"""

@property

def name(self):

"""

Name of variable/function/class/module.

For example, for ``x = None`` it returns ``'x'``.

:rtype: str or None

"""

return self._name.string_name

@property

def type(self):

"""

The type of the definition.

Here is an example of the value of this attribute. Let's consider

the following source. As what is in ``variable`` is unambiguous

to Jedi, :meth:`jedi.Script.goto_definitions` should return a list of

definition for ``sys``, ``f``, ``C`` and ``x``.

>>> from jedi import Script

>>> source = '''

... import keyword

...

... class C:

... pass

...

... class D:

... pass

...

... x = D()

...

... def f():

... pass

...

... for variable in [keyword, f, C, x]:

... variable'''

>>> script = Script(source)

>>> defs = script.goto_definitions()

Before showing what is in ``defs``, let's sort it by :attr:`line`

so that it is easy to relate the result to the source code.

>>> defs = sorted(defs, key=lambda d: d.line)

>>> defs # doctest: +NORMALIZE_WHITESPACE

[<Definition module keyword>, <Definition class C>,

<Definition instance D>, <Definition def f>]

Finally, here is what you can get from :attr:`type`:

>>> defs[0].type

'module'

>>> defs[1].type

'class'

>>> defs[2].type

'instance'

>>> defs[3].type

'function'

"""

tree_name = self._name.tree_name

resolve = False

if tree_name is not None:

# TODO move this to their respective names.

definition = tree_name.get_definition()

if definition is not None and definition.type == 'import_from' and \

tree_name.is_definition():

resolve = True

if isinstance(self._name, imports.SubModuleName) or resolve:

for context in self._name.infer():

return context.api_type

return self._name.api_type

def _path(self):

"""The path to a module/class/function definition."""

def to_reverse():

name = self._name

if name.api_type == 'module':

try:

name = list(name.infer())[0].name

except IndexError:

pass

if name.api_type == 'module':

module_contexts = name.infer()

if module_contexts:

module_context, = module_contexts

for n in reversed(module_context.py__name__().split('.')):

yield n

else:

# We don't really know anything about the path here. This

# module is just an import that would lead in an

# ImportError. So simply return the name.

yield name.string_name

return

else:

yield name.string_name

parent_context = name.parent_context

while parent_context is not None:

try:

method = parent_context.py__name__

except AttributeError:

try:

yield parent_context.name.string_name

except AttributeError:

pass

else:

for name in reversed(method().split('.')):

yield name

parent_context = parent_context.parent_context

return reversed(list(to_reverse()))

@property

def module_name(self):

"""

The module name.

>>> from jedi import Script

>>> source = 'import json'

>>> script = Script(source, path='example.py')

>>> d = script.goto_definitions()[0]

>>> print(d.module_name) # doctest: +ELLIPSIS

json

"""

return self._module.name.string_name

def in_builtin_module(self):

"""Whether this is a builtin module."""

return isinstance(self._module, compiled.CompiledObject)

@property

def line(self):

"""The line where the definition occurs (starting with 1)."""

start_pos = self._name.start_pos

if start_pos is None:

return None

return start_pos[0]

@property

def column(self):

"""The column where the definition occurs (starting with 0)."""

start_pos = self._name.start_pos

if start_pos is None:

return None

return start_pos[1]

def docstring(self, raw=False, fast=True):

r"""

Return a document string for this completion object.

Example:

>>> from jedi import Script

>>> source = '''\

... def f(a, b=1):

... "Document for function f."

... '''

>>> script = Script(source, 1, len('def f'), 'example.py')

>>> doc = script.goto_definitions()[0].docstring()

>>> print(doc)

f(a, b=1)

Document for function f.

Notice that useful extra information is added to the actual

docstring. For function, it is call signature. If you need

actual docstring, use ``raw=True`` instead.

>>> print(script.goto_definitions()[0].docstring(raw=True))

Document for function f.

:param fast: Don't follow imports that are only one level deep like

``import foo``, but follow ``from foo import bar``. This makes

sense for speed reasons. Completing `import a` is slow if you use

the ``foo.docstring(fast=False)`` on every object, because it

parses all libraries starting with ``a``.

"""

return _Help(self._name).docstring(fast=fast, raw=raw)

@property

def description(self):

"""A textual description of the object."""

return u(self._name.string_name)

@property

def full_name(self):

"""

Dot-separated path of this object.

It is in the form of ``<module>[.<submodule>[...]][.<object>]``.

It is useful when you want to look up Python manual of the

object at hand.

Example:

>>> from jedi import Script

>>> source = '''

... import os

... os.path.join'''

>>> script = Script(source, 3, len('os.path.join'), 'example.py')

>>> print(script.goto_definitions()[0].full_name)

os.path.join

Notice that it returns ``'os.path.join'`` instead of (for example)

``'posixpath.join'``. This is not correct, since the modules name would

be ``<module 'posixpath' ...>```. However most users find the latter

more practical.

"""

path = list(self._path())

# TODO add further checks, the mapping should only occur on stdlib.

if not path:

return None # for keywords the path is empty

with ignored(KeyError):

path[0] = self._mapping[path[0]]

for key, repl in self._tuple_mapping.items():

if tuple(path[:len(key)]) == key:

path = [repl] + path[len(key):]

return '.'.join(path if path[0] else path[1:])

def goto_assignments(self):

if self._name.tree_name is None:

return self

names = self._evaluator.goto(self._name.parent_context, self._name.tree_name)

return [Definition(self._evaluator, n) for n in names]

def _goto_definitions(self):

# TODO make this function public.

return [Definition(self._evaluator, d.name) for d in self._name.infer()]

@property

@memoize_method

def params(self):

"""

Raises an ``AttributeError``if the definition is not callable.

Otherwise returns a list of `Definition` that represents the params.

"""

def get_param_names(context):

param_names = []

if context.api_type == 'function':

param_names = list(context.get_param_names())

if isinstance(context, instance.BoundMethod):

param_names = param_names[1:]

elif isinstance(context, (instance.AbstractInstanceContext, ClassContext)):

if isinstance(context, ClassContext):

search = '__init__'

else:

search = '__call__'

names = context.get_function_slot_names(search)

if not names:

return []

# Just take the first one here, not optimal, but currently

# there's no better solution.

inferred = names[0].infer()

param_names = get_param_names(next(iter(inferred)))

if isinstance(context, ClassContext):

param_names = param_names[1:]

return param_names

elif isinstance(context, compiled.CompiledObject):

return list(context.get_param_names())

return param_names

followed = list(self._name.infer())

if not followed or not hasattr(followed[0], 'py__call__'):

raise AttributeError()

context = followed[0] # only check the first one.

return [Definition(self._evaluator, n) for n in get_param_names(context)]

def parent(self):

context = self._name.parent_context

if context is None:

return None

if isinstance(context, FunctionExecutionContext):

# TODO the function context should be a part of the function

# execution context.

context = FunctionContext(

self._evaluator, context.parent_context, context.tree_node)

return Definition(self._evaluator, context.name)

def __repr__(self):

return "<%s %s>" % (type(self).__name__, self.description)

def get_line_code(self, before=0, after=0):

"""

Returns the line of code where this object was defined.

:param before: Add n lines before the current line to the output.

:param after: Add n lines after the current line to the output.

:return str: Returns the line(s) of code or an empty string if it's a

builtin.

"""

if self.in_builtin_module():

return ''

path = self._name.get_root_context().py__file__()

lines = parser_cache[self._evaluator.grammar._hashed][path].lines

index = self._name.start_pos[0] - 1

start_index = max(index - before, 0)

return ''.join(lines[start_index:index + after + 1])

class Completion(BaseDefinition):

"""

`Completion` objects are returned from :meth:`api.Script.completions`. They

provide additional information about a completion.

"""

def __init__(self, evaluator, name, stack, like_name_length):

super(Completion, self).__init__(evaluator, name)

self._like_name_length = like_name_length

self._stack = stack

# Completion objects with the same Completion name (which means

# duplicate items in the completion)

self._same_name_completions = []

def _complete(self, like_name):

append = ''

if settings.add_bracket_after_function \

and self.type == 'Function':

append = '('

if isinstance(self._name, ParamName) and self._stack is not None:

node_names = list(self._stack.get_node_names(self._evaluator.grammar._pgen_grammar))

if 'trailer' in node_names and 'argument' not in node_names:

append += '='

name = self._name.string_name

if like_name:

name = name[self._like_name_length:]

return name + append

@property

def complete(self):

"""

Return the rest of the word, e.g. completing ``isinstance``::

isinstan# <-- Cursor is here

would return the string 'ce'. It also adds additional stuff, depending

on your `settings.py`.

Assuming the following function definition::

def foo(param=0):

pass

completing ``foo(par`` would give a ``Completion`` which `complete`

would be `am=`

"""

return self._complete(True)

@property

def name_with_symbols(self):

"""

Similar to :attr:`name`, but like :attr:`name` returns also the

symbols, for example assuming the following function definition::

def foo(param=0):

pass

completing ``foo(`` would give a ``Completion`` which

``name_with_symbols`` would be "param=".

"""

return self._complete(False)

def docstring(self, raw=False, fast=True):

if self._like_name_length >= 3:

# In this case we can just resolve the like name, because we

# wouldn't load like > 100 Python modules anymore.

fast = False

return super(Completion, self).docstring(raw=raw, fast=fast)

@property

def description(self):

"""Provide a description of the completion object."""

# TODO improve the class structure.

return Definition.description.__get__(self)

def __repr__(self):

return '<%s: %s>' % (type(self).__name__, self._name.string_name)

@memoize_method

def follow_definition(self):

"""

Return the original definitions. I strongly recommend not using it for

your completions, because it might slow down |jedi|. If you want to

read only a few objects (<=20), it might be useful, especially to get

the original docstrings. The basic problem of this function is that it

follows all results. This means with 1000 completions (e.g. numpy),

it's just PITA-slow.

"""

defs = self._name.infer()

return [Definition(self._evaluator, d.name) for d in defs]

class Definition(BaseDefinition):

"""

*Definition* objects are returned from :meth:`api.Script.goto_assignments`

or :meth:`api.Script.goto_definitions`.

"""

def __init__(self, evaluator, definition):

super(Definition, self).__init__(evaluator, definition)

@property

def description(self):

"""

A description of the :class:`.Definition` object, which is heavily used

in testing. e.g. for ``isinstance`` it returns ``def isinstance``.

Example:

>>> from jedi import Script

>>> source = '''

... def f():

... pass

...

... class C:

... pass

...

... variable = f if random.choice([0,1]) else C'''

>>> script = Script(source, column=3) # line is maximum by default

>>> defs = script.goto_definitions()

>>> defs = sorted(defs, key=lambda d: d.line)

>>> defs

[<Definition def f>, <Definition class C>]

>>> str(defs[0].description) # strip literals in python2

'def f'

>>> str(defs[1].description)

'class C'

"""

typ = self.type

tree_name = self._name.tree_name

if typ in ('function', 'class', 'module', 'instance') or tree_name is None:

if typ == 'function':

# For the description we want a short and a pythonic way.

typ = 'def'

return typ + ' ' + u(self._name.string_name)

elif typ == 'param':

code = search_ancestor(tree_name, 'param').get_code(

include_prefix=False,

include_comma=False

)

return typ + ' ' + code

definition = tree_name.get_definition() or tree_name

# Remove the prefix, because that's not what we want for get_code

# here.

txt = definition.get_code(include_prefix=False)

# Delete comments:

txt = re.sub('#[^\n]+\n', ' ', txt)

# Delete multi spaces/newlines

txt = re.sub('\s+', ' ', txt).strip()

return txt

@property

def desc_with_module(self):

"""

In addition to the definition, also return the module.

.. warning:: Don't use this function yet, its behaviour may change. If

you really need it, talk to me.

.. todo:: Add full path. This function is should return a

`module.class.function` path.

"""

position = '' if self.in_builtin_module else '@%s' % (self.line)

return "%s:%s%s" % (self.module_name, self.description, position)

@memoize_method

def defined_names(self):

"""

List sub-definitions (e.g., methods in class).

:rtype: list of Definition

"""

defs = self._name.infer()

return sorted(

unite(defined_names(self._evaluator, d) for d in defs),

key=lambda s: s._name.start_pos or (0, 0)

)

def is_definition(self):

"""

Returns True, if defined as a name in a statement, function or class.

Returns False, if it's a reference to such a definition.

"""

if self._name.tree_name is None:

return True

else:

return self._name.tree_name.is_definition()

def __eq__(self, other):

return self._name.start_pos == other._name.start_pos \

and self.module_path == other.module_path \

and self.name == other.name \

and self._evaluator == other._evaluator

def __ne__(self, other):

return not self.__eq__(other)

def __hash__(self):

return hash((self._name.start_pos, self.module_path, self.name, self._evaluator))

class CallSignature(Definition):

"""

`CallSignature` objects is the return value of `Script.function_definition`.

It knows what functions you are currently in. e.g. `isinstance(` would

return the `isinstance` function. without `(` it would return nothing.

"""

def __init__(self, evaluator, executable_name, bracket_start_pos, index, key_name_str):

super(CallSignature, self).__init__(evaluator, executable_name)

self._index = index

self._key_name_str = key_name_str

self._bracket_start_pos = bracket_start_pos

@property

def index(self):

"""

The Param index of the current call.

Returns None if the index cannot be found in the curent call.

"""

if self._key_name_str is not None:

for i, param in enumerate(self.params):

if self._key_name_str == param.name:

return i

if self.params:

param_name = self.params[-1]._name

if param_name.tree_name is not None:

if param_name.tree_name.get_definition().star_count == 2:

return i

return None

if self._index >= len(self.params):

for i, param in enumerate(self.params):

tree_name = param._name.tree_name

if tree_name is not None:

# *args case

if tree_name.get_definition().star_count == 1:

return i

return None

return self._index

@property

def bracket_start(self):

"""

The indent of the bracket that is responsible for the last function

call.

"""

return self._bracket_start_pos

def __repr__(self):

return '<%s: %s index %s>' % \

(type(self).__name__, self._name.string_name, self.index)

class _Help(object):

"""

Temporary implementation, will be used as `Script.help() or something in

the future.

"""

def __init__(self, definition):

self._name = definition

@memoize_method

def _get_contexts(self, fast):

if isinstance(self._name, ImportName) and fast:

return {}

if self._name.api_type == 'statement':

return {}

return self._name.infer()

def docstring(self, fast=True, raw=True):

"""

The docstring ``__doc__`` for any object.

See :attr:`doc` for example.

"""

# TODO: Use all of the followed objects as output. Possibly divinding

# them by a few dashes.

for context in self._get_contexts(fast=fast):

return context.py__doc__(include_call_signature=not raw)

return ''

pythonVSCode/pythonFiles/jedi/api/classes.py at master · Jeaninecar/pythonVSCode · GitHub

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