"""

Used only for REPL Completion.

"""

import inspect

import os

from jedi import common

from jedi.parser.fast import FastParser

from jedi.evaluate import compiled

from jedi.cache import underscore_memoization

class MixedObject(object):

"""

A ``MixedObject`` is used in two ways:

1. It uses the default logic of ``parser.tree`` objects,

2. except for getattr calls. The names dicts are generated in a fashion

like ``CompiledObject``.

This combined logic makes it possible to provide more powerful REPL

completion. It allows side effects that are not noticable with the default

parser structure to still be completeable.

The biggest difference from CompiledObject to MixedObject is that we are

generally dealing with Python code and not with C code. This will generate

fewer special cases, because we in Python you don't have the same freedoms

to modify the runtime.

"""

def __init__(self, evaluator, obj, node_name):

self._evaluator = evaluator

self.obj = obj

self.node_name = node_name

self.definition = node_name.get_definition()

@property

def names_dict(self):

return LazyMixedNamesDict(self._evaluator, self)

def names_dicts(self, search_global):

# TODO is this needed?

assert search_global is False

return [self.names_dict]

def api_type(self):

mappings = {

'expr_stmt': 'statement',

'classdef': 'class',

'funcdef': 'function',

'file_input': 'module',

}

return mappings[self.definition.type]

def __repr__(self):

return '<%s: %s>' % (type(self).__name__, repr(self.obj))

def __getattr__(self, name):

return getattr(self.definition, name)

class MixedName(compiled.CompiledName):

"""

The ``CompiledName._compiled_object`` is our MixedObject.

"""

@property

@underscore_memoization

def parent(self):

return create(self._evaluator, getattr(self._compiled_obj.obj, self.name))

@parent.setter

def parent(self, value):

pass # Just ignore this, Name tries to overwrite the parent attribute.

@property

def start_pos(self):

if isinstance(self.parent, MixedObject):

return self.parent.node_name.start_pos

# This means a start_pos that doesn't exist (compiled objects).

return (0, 0)

class LazyMixedNamesDict(compiled.LazyNamesDict):

name_class = MixedName

def parse(grammar, path):

with open(path) as f:

source = f.read()

source = common.source_to_unicode(source)

return FastParser(grammar, source, path)

def _load_module(evaluator, path, python_object):

module = parse(evaluator.grammar, path).module

python_module = inspect.getmodule(python_object)

evaluator.modules[python_module.__name__] = module

return module

def find_syntax_node_name(evaluator, python_object):

try:

path = inspect.getsourcefile(python_object)

except TypeError:

# The type might not be known (e.g. class_with_dict.__weakref__)

return None

if path is None or not os.path.exists(path):

# The path might not exist or be e.g. <stdin>.

return None

module = _load_module(evaluator, path, python_object)

if inspect.ismodule(python_object):

# We don't need to check names for modules, because there's not really

# a way to write a module in a module in Python (and also __name__ can

# be something like ``email.utils``).

return module

name_str = python_object.__name__

if name_str == '<lambda>':

return None # It's too hard to find lambdas.

names = module.used_names[name_str]

names = [n for n in names if n.is_definition()]

try:

code = python_object.__code__

# By using the line number of a code object we make the lookup in a

# file pretty easy. There's still a possibility of people defining

# stuff like ``a = 3; foo(a); a = 4`` on the same line, but if people

# do so we just don't care.

line_nr = code.co_firstlineno

except AttributeError:

pass

else:

line_names = [name for name in names if name.start_pos[0] == line_nr]

# There's a chance that the object is not available anymore, because

# the code has changed in the background.

if line_names:

return line_names[-1]

# It's really hard to actually get the right definition, here as a last

# resort we just return the last one. This chance might lead to odd

# completions at some points but will lead to mostly correct type

# inference, because people tend to define a public name in a module only

# once.

return names[-1]

@compiled.compiled_objects_cache('mixed_cache')

def create(evaluator, obj):

name = find_syntax_node_name(evaluator, obj)

if name is None:

return compiled.create(evaluator, obj)

else:

return MixedObject(evaluator, obj, name)