forked from VimPlug/jedi
638 lines
25 KiB
Python
638 lines
25 KiB
Python
"""
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The API basically only provides one class. You can create a :class:`Script` and
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use its methods.
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Additionally you can add a debug function with :func:`set_debug_function`.
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Alternatively, if you don't need a custom function and are happy with printing
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debug messages to stdout, simply call :func:`set_debug_function` without
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arguments.
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.. warning:: Please, note that Jedi is **not thread safe**.
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"""
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import os
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import sys
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import warnings
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import parso
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from parso.python import tree
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from jedi._compatibility import force_unicode, cast_path, is_py3
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from jedi.parser_utils import get_executable_nodes
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from jedi import debug
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from jedi import settings
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from jedi import cache
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from jedi.file_io import KnownContentFileIO
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from jedi.api import classes
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from jedi.api import interpreter
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from jedi.api import helpers
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from jedi.api.helpers import validate_line_column
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from jedi.api.completion import Completion
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from jedi.api.keywords import KeywordName
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from jedi.api.environment import InterpreterEnvironment
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from jedi.api.project import get_default_project, Project
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from jedi.inference import InferenceState
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from jedi.inference import imports
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from jedi.inference.references import find_references
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from jedi.inference.arguments import try_iter_content
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from jedi.inference.helpers import get_module_names, infer_call_of_leaf
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from jedi.inference.sys_path import transform_path_to_dotted
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from jedi.inference.syntax_tree import tree_name_to_values
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from jedi.inference.value import ModuleValue
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from jedi.inference.base_value import ValueSet
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from jedi.inference.value.iterable import unpack_tuple_to_dict
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from jedi.inference.gradual.conversion import convert_names, convert_values
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from jedi.inference.gradual.utils import load_proper_stub_module
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# Jedi uses lots and lots of recursion. By setting this a little bit higher, we
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# can remove some "maximum recursion depth" errors.
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sys.setrecursionlimit(3000)
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class Script(object):
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"""
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A Script is the base for completions, goto or whatever you want to do with
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|jedi|.
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You can either use the ``source`` parameter or ``path`` to read a file.
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Usually you're going to want to use both of them (in an editor).
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The script might be analyzed in a different ``sys.path`` than |jedi|:
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- if `sys_path` parameter is not ``None``, it will be used as ``sys.path``
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for the script;
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- if `sys_path` parameter is ``None`` and ``VIRTUAL_ENV`` environment
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variable is defined, ``sys.path`` for the specified environment will be
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guessed (see :func:`jedi.inference.sys_path.get_venv_path`) and used for
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the script;
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- otherwise ``sys.path`` will match that of |jedi|.
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:param source: The source code of the current file, separated by newlines.
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:type source: str
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:param line: Deprecated, please use it directly on e.g. `.complete`
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:type line: int
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:param column: Deprecated, please use it directly on e.g. `.complete`
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:type column: int
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:param path: The path of the file in the file system, or ``''`` if
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it hasn't been saved yet.
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:type path: str or None
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:param encoding: The encoding of ``source``, if it is not a
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``unicode`` object (default ``'utf-8'``).
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:type encoding: str
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:param sys_path: ``sys.path`` to use during analysis of the script
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:type sys_path: list
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:param environment: TODO
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:type environment: Environment
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"""
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def __init__(self, source=None, line=None, column=None, path=None,
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encoding='utf-8', sys_path=None, environment=None,
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_project=None):
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self._orig_path = path
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# An empty path (also empty string) should always result in no path.
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self.path = os.path.abspath(path) if path else None
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if source is None:
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# TODO add a better warning than the traceback!
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with open(path, 'rb') as f:
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source = f.read()
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# Load the Python grammar of the current interpreter.
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self._grammar = parso.load_grammar()
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if sys_path is not None and not is_py3:
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sys_path = list(map(force_unicode, sys_path))
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project = _project
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if project is None:
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# Load the Python grammar of the current interpreter.
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project = get_default_project(
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os.path.dirname(self.path)if path else os.getcwd()
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)
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# TODO deprecate and remove sys_path from the Script API.
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if sys_path is not None:
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project._sys_path = sys_path
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self._inference_state = InferenceState(
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project, environment=environment, script_path=self.path
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)
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debug.speed('init')
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self._module_node, source = self._inference_state.parse_and_get_code(
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code=source,
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path=self.path,
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encoding=encoding,
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use_latest_grammar=path and path.endswith('.pyi'),
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cache=False, # No disk cache, because the current script often changes.
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diff_cache=settings.fast_parser,
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cache_path=settings.cache_directory,
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)
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debug.speed('parsed')
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self._code_lines = parso.split_lines(source, keepends=True)
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self._code = source
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self._pos = line, column
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cache.clear_time_caches()
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debug.reset_time()
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# Cache the module, this is mostly useful for testing, since this shouldn't
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# be called multiple times.
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@cache.memoize_method
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def _get_module(self):
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names = None
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is_package = False
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if self.path is not None:
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import_names, is_p = transform_path_to_dotted(
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self._inference_state.get_sys_path(add_parent_paths=False),
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self.path
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)
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if import_names is not None:
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names = import_names
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is_package = is_p
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if self.path is None:
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file_io = None
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else:
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file_io = KnownContentFileIO(cast_path(self.path), self._code)
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if self.path is not None and self.path.endswith('.pyi'):
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# We are in a stub file. Try to load the stub properly.
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stub_module = load_proper_stub_module(
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self._inference_state,
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file_io,
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names,
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self._module_node
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)
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if stub_module is not None:
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return stub_module
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if names is None:
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names = ('__main__',)
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module = ModuleValue(
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self._inference_state, self._module_node,
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file_io=file_io,
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string_names=names,
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code_lines=self._code_lines,
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is_package=is_package,
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)
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if names[0] not in ('builtins', '__builtin__', 'typing'):
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# These modules are essential for Jedi, so don't overwrite them.
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self._inference_state.module_cache.add(names, ValueSet([module]))
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return module
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def _get_module_context(self):
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return self._get_module().as_context()
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def __repr__(self):
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return '<%s: %s %r>' % (
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self.__class__.__name__,
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repr(self._orig_path),
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self._inference_state.environment,
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)
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@validate_line_column
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def complete(self, line=None, column=None, **kwargs):
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"""
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Return :class:`classes.Completion` objects. Those objects contain
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information about the completions, more than just names.
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:param fuzzy: Default False. Will return fuzzy completions, which means
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that e.g. ``ooa`` will match ``foobar``.
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:return: Completion objects, sorted by name and ``__`` comes last.
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:rtype: list of :class:`classes.Completion`
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"""
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return self._complete(line, column, **kwargs)
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def _complete(self, line, column, fuzzy=False): # Python 2...
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with debug.increase_indent_cm('complete'):
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completion = Completion(
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self._inference_state, self._get_module_context(), self._code_lines,
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(line, column), self.get_signatures, fuzzy=fuzzy,
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)
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return completion.complete()
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def completions(self, fuzzy=False):
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# Deprecated, will be removed.
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return self.complete(*self._pos, fuzzy=fuzzy)
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@validate_line_column
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def infer(self, line=None, column=None, **kwargs):
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"""
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Return the definitions of a the path under the cursor. goto function!
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This follows complicated paths and returns the end, not the first
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definition. The big difference between :meth:`goto` and
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:meth:`infer` is that :meth:`goto` doesn't
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follow imports and statements. Multiple objects may be returned,
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because Python itself is a dynamic language, which means depending on
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an option you can have two different versions of a function.
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:param only_stubs: Only return stubs for this goto call.
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:param prefer_stubs: Prefer stubs to Python objects for this type
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inference call.
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:rtype: list of :class:`classes.Definition`
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"""
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with debug.increase_indent_cm('infer'):
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return self._infer(line, column, **kwargs)
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def goto_definitions(self, **kwargs):
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# Deprecated, will be removed.
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return self.infer(*self._pos, **kwargs)
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def _infer(self, line, column, only_stubs=False, prefer_stubs=False):
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pos = line, column
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leaf = self._module_node.get_name_of_position(pos)
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if leaf is None:
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leaf = self._module_node.get_leaf_for_position(pos)
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if leaf is None or leaf.type == 'string':
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return []
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context = self._get_module_context().create_context(leaf)
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values = helpers.infer(self._inference_state, context, leaf)
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values = convert_values(
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values,
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only_stubs=only_stubs,
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prefer_stubs=prefer_stubs,
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)
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defs = [classes.Definition(self._inference_state, c.name) for c in values]
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# The additional set here allows the definitions to become unique in an
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# API sense. In the internals we want to separate more things than in
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# the API.
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return helpers.sorted_definitions(set(defs))
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def goto_assignments(self, follow_imports=False, follow_builtin_imports=False, **kwargs):
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# Deprecated, will be removed.
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return self.goto(*self._pos,
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follow_imports=follow_imports,
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follow_builtin_imports=follow_builtin_imports,
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**kwargs)
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@validate_line_column
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def goto(self, line=None, column=None, **kwargs):
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"""
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Return the first definition found, while optionally following imports.
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Multiple objects may be returned, because Python itself is a
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dynamic language, which means depending on an option you can have two
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different versions of a function.
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:param follow_imports: The goto call will follow imports.
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:param follow_builtin_imports: If follow_imports is True will decide if
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it follow builtin imports.
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:param only_stubs: Only return stubs for this goto call.
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:param prefer_stubs: Prefer stubs to Python objects for this goto call.
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:rtype: list of :class:`classes.Definition`
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"""
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with debug.increase_indent_cm('goto'):
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return self._goto(line, column, **kwargs)
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def _goto(self, line, column, follow_imports=False, follow_builtin_imports=False,
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only_stubs=False, prefer_stubs=False):
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def filter_follow_imports(names):
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for name in names:
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if name.is_import():
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new_names = list(filter_follow_imports(name.goto()))
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found_builtin = False
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if follow_builtin_imports:
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for new_name in new_names:
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if new_name.start_pos is None:
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found_builtin = True
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if found_builtin:
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yield name
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else:
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for new_name in new_names:
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yield new_name
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else:
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yield name
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tree_name = self._module_node.get_name_of_position((line, column))
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if tree_name is None:
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# Without a name we really just want to jump to the result e.g.
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# executed by `foo()`, if we the cursor is after `)`.
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return self.infer(line, column, only_stubs=only_stubs, prefer_stubs=prefer_stubs)
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name = self._get_module_context().create_name(tree_name)
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# Make it possible to goto the super class function/attribute
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# definitions, when they are overwritten.
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names = []
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if name.tree_name.is_definition() and name.parent_context.is_class():
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class_node = name.parent_context.tree_node
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class_value = self._get_module_context().create_value(class_node)
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mro = class_value.py__mro__()
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next(mro) # Ignore the first entry, because it's the class itself.
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for cls in mro:
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names = cls.goto(tree_name.value)
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if names:
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break
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if not names:
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names = list(name.goto())
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if follow_imports:
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names = filter_follow_imports(names)
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names = convert_names(
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names,
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only_stubs=only_stubs,
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prefer_stubs=prefer_stubs,
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)
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defs = [classes.Definition(self._inference_state, d) for d in set(names)]
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return helpers.sorted_definitions(defs)
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@validate_line_column
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def help(self, line=None, column=None):
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"""
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Works like goto and returns a list of Definition objects. Returns
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additional definitions for keywords and operators.
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The additional definitions are of ``Definition(...).type == 'keyword'``.
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These definitions do not have a lot of value apart from their docstring
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attribute, which contains the output of Python's ``help()`` function.
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:rtype: list of :class:`classes.Definition`
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"""
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definitions = self.goto(line, column, follow_imports=True)
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if definitions:
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return definitions
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leaf = self._module_node.get_leaf_for_position((line, column))
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if leaf.type in ('keyword', 'operator', 'error_leaf'):
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reserved = self._grammar._pgen_grammar.reserved_syntax_strings.keys()
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if leaf.value in reserved:
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name = KeywordName(self._inference_state, leaf.value)
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return [classes.Definition(self._inference_state, name)]
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return []
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def usages(self, **kwargs):
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# Deprecated, will be removed.
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return self.get_references(*self._pos, **kwargs)
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@validate_line_column
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def get_references(self, line=None, column=None, **kwargs):
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"""
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Return :class:`classes.Definition` objects, which contain all
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names that point to the definition of the name under the cursor. This
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is very useful for refactoring (renaming), or to show all references of
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a variable.
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:param include_builtins: Default True, checks if a reference is a
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builtin (e.g. ``sys``) and in that case does not return it.
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:rtype: list of :class:`classes.Definition`
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"""
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def _references(include_builtins=True):
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tree_name = self._module_node.get_name_of_position((line, column))
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if tree_name is None:
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# Must be syntax
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return []
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names = find_references(self._get_module_context(), tree_name)
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definitions = [classes.Definition(self._inference_state, n) for n in names]
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if not include_builtins:
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definitions = [d for d in definitions if not d.in_builtin_module()]
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return helpers.sorted_definitions(definitions)
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return _references(**kwargs)
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def call_signatures(self):
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# Deprecated, will be removed.
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return self.get_signatures(*self._pos)
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@validate_line_column
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def get_signatures(self, line=None, column=None):
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"""
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Return the function object of the call you're currently in.
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E.g. if the cursor is here::
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abs(# <-- cursor is here
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This would return the ``abs`` function. On the other hand::
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abs()# <-- cursor is here
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This would return an empty list..
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:rtype: list of :class:`classes.Signature`
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"""
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pos = line, column
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call_details = helpers.get_signature_details(self._module_node, pos)
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if call_details is None:
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return []
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context = self._get_module_context().create_context(call_details.bracket_leaf)
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definitions = helpers.cache_signatures(
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self._inference_state,
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context,
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call_details.bracket_leaf,
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self._code_lines,
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pos
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)
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debug.speed('func_call followed')
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# TODO here we use stubs instead of the actual values. We should use
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# the signatures from stubs, but the actual values, probably?!
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return [classes.Signature(self._inference_state, signature, call_details)
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for signature in definitions.get_signatures()]
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@validate_line_column
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def get_context(self, line=None, column=None):
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pos = (line, column)
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leaf = self._module_node.get_leaf_for_position(pos, include_prefixes=True)
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if leaf.start_pos > pos or leaf.type == 'endmarker':
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previous_leaf = leaf.get_previous_leaf()
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if previous_leaf is not None:
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leaf = previous_leaf
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module_context = self._get_module_context()
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n = tree.search_ancestor(leaf, 'funcdef', 'classdef')
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if n is not None and n.start_pos < pos <= n.children[-1].start_pos:
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# This is a bit of a special case. The context of a function/class
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# name/param/keyword is always it's parent context, not the
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# function itself. Catch all the cases here where we are before the
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# suite object, but still in the function.
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context = module_context.create_value(n).as_context()
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else:
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context = module_context.create_context(leaf)
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while context.name is None:
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context = context.parent_context # comprehensions
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definition = classes.Definition(self._inference_state, context.name)
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while definition.type != 'module':
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name = definition._name # TODO private access
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tree_name = name.tree_name
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if tree_name is not None: # Happens with lambdas.
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scope = tree_name.get_definition()
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if scope.start_pos[1] < column:
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break
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definition = definition.parent()
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return definition
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def _analysis(self):
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self._inference_state.is_analysis = True
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self._inference_state.analysis_modules = [self._module_node]
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module = self._get_module_context()
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try:
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for node in get_executable_nodes(self._module_node):
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context = module.create_context(node)
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if node.type in ('funcdef', 'classdef'):
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# Resolve the decorators.
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tree_name_to_values(self._inference_state, context, node.children[1])
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elif isinstance(node, tree.Import):
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import_names = set(node.get_defined_names())
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if node.is_nested():
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import_names |= set(path[-1] for path in node.get_paths())
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for n in import_names:
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imports.infer_import(context, n)
|
|
elif node.type == 'expr_stmt':
|
|
types = context.infer_node(node)
|
|
for testlist in node.children[:-1:2]:
|
|
# Iterate tuples.
|
|
unpack_tuple_to_dict(context, types, testlist)
|
|
else:
|
|
if node.type == 'name':
|
|
defs = self._inference_state.infer(context, node)
|
|
else:
|
|
defs = infer_call_of_leaf(context, node)
|
|
try_iter_content(defs)
|
|
self._inference_state.reset_recursion_limitations()
|
|
|
|
ana = [a for a in self._inference_state.analysis if self.path == a.path]
|
|
return sorted(set(ana), key=lambda x: x.line)
|
|
finally:
|
|
self._inference_state.is_analysis = False
|
|
|
|
def names(self, **kwargs):
|
|
"""
|
|
Returns a list of `Definition` objects, containing name parts.
|
|
This means you can call ``Definition.goto()`` and get the
|
|
reference of a name.
|
|
|
|
:param all_scopes: If True lists the names of all scopes instead of only
|
|
the module namespace.
|
|
:param definitions: If True lists the names that have been defined by a
|
|
class, function or a statement (``a = b`` returns ``a``).
|
|
:param references: If True lists all the names that are not listed by
|
|
``definitions=True``. E.g. ``a = b`` returns ``b``.
|
|
"""
|
|
return self._names(**kwargs) # Python 2...
|
|
|
|
def _names(self, all_scopes=False, definitions=True, references=False):
|
|
def def_ref_filter(_def):
|
|
is_def = _def._name.tree_name.is_definition()
|
|
return definitions and is_def or references and not is_def
|
|
|
|
# Set line/column to a random position, because they don't matter.
|
|
module_context = self._get_module_context()
|
|
defs = [
|
|
classes.Definition(
|
|
self._inference_state,
|
|
module_context.create_name(name)
|
|
) for name in get_module_names(self._module_node, all_scopes)
|
|
]
|
|
return sorted(filter(def_ref_filter, defs), key=lambda x: (x.line, x.column))
|
|
|
|
|
|
class Interpreter(Script):
|
|
"""
|
|
Jedi API for Python REPLs.
|
|
|
|
In addition to completion of simple attribute access, Jedi
|
|
supports code completion based on static code analysis.
|
|
Jedi can complete attributes of object which is not initialized
|
|
yet.
|
|
|
|
>>> from os.path import join
|
|
>>> namespace = locals()
|
|
>>> script = Interpreter('join("").up', [namespace])
|
|
>>> print(script.complete()[0].name)
|
|
upper
|
|
"""
|
|
_allow_descriptor_getattr_default = True
|
|
|
|
def __init__(self, source, namespaces, **kwds):
|
|
"""
|
|
Parse `source` and mixin interpreted Python objects from `namespaces`.
|
|
|
|
:type source: str
|
|
:arg source: Code to parse.
|
|
:type namespaces: list of dict
|
|
:arg namespaces: a list of namespace dictionaries such as the one
|
|
returned by :func:`locals`.
|
|
|
|
Other optional arguments are same as the ones for :class:`Script`.
|
|
If `line` and `column` are None, they are assumed be at the end of
|
|
`source`.
|
|
"""
|
|
try:
|
|
namespaces = [dict(n) for n in namespaces]
|
|
except Exception:
|
|
raise TypeError("namespaces must be a non-empty list of dicts.")
|
|
|
|
environment = kwds.get('environment', None)
|
|
if environment is None:
|
|
environment = InterpreterEnvironment()
|
|
else:
|
|
if not isinstance(environment, InterpreterEnvironment):
|
|
raise TypeError("The environment needs to be an InterpreterEnvironment subclass.")
|
|
|
|
super(Interpreter, self).__init__(source, environment=environment,
|
|
_project=Project(os.getcwd()), **kwds)
|
|
self.namespaces = namespaces
|
|
self._inference_state.allow_descriptor_getattr = self._allow_descriptor_getattr_default
|
|
|
|
@cache.memoize_method
|
|
def _get_module_context(self):
|
|
tree_module_value = ModuleValue(
|
|
self._inference_state, self._module_node,
|
|
file_io=KnownContentFileIO(self.path, self._code),
|
|
string_names=('__main__',),
|
|
code_lines=self._code_lines,
|
|
)
|
|
return interpreter.MixedModuleContext(
|
|
tree_module_value,
|
|
self.namespaces,
|
|
)
|
|
|
|
|
|
def names(source=None, path=None, encoding='utf-8', all_scopes=False,
|
|
definitions=True, references=False, environment=None):
|
|
warnings.warn(
|
|
"Deprecated since version 0.16.0. Use Script(...).names instead.",
|
|
DeprecationWarning,
|
|
stacklevel=2
|
|
)
|
|
|
|
return Script(source, path=path, encoding=encoding).names(
|
|
all_scopes=all_scopes,
|
|
definitions=definitions,
|
|
references=references,
|
|
)
|
|
|
|
|
|
def preload_module(*modules):
|
|
"""
|
|
Preloading modules tells Jedi to load a module now, instead of lazy parsing
|
|
of modules. Usful for IDEs, to control which modules to load on startup.
|
|
|
|
:param modules: different module names, list of string.
|
|
"""
|
|
for m in modules:
|
|
s = "import %s as x; x." % m
|
|
Script(s, path=None).complete(1, len(s))
|
|
|
|
|
|
def set_debug_function(func_cb=debug.print_to_stdout, warnings=True,
|
|
notices=True, speed=True):
|
|
"""
|
|
Define a callback debug function to get all the debug messages.
|
|
|
|
If you don't specify any arguments, debug messages will be printed to stdout.
|
|
|
|
:param func_cb: The callback function for debug messages, with n params.
|
|
"""
|
|
debug.debug_function = func_cb
|
|
debug.enable_warning = warnings
|
|
debug.enable_notice = notices
|
|
debug.enable_speed = speed
|