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- # Copyright (c) 2016 Claudiu Popa <pcmanticore@gmail.com>
-
- # Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
- # For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
-
- '''Astroid brain hints for some of the _io C objects.'''
-
- import astroid
-
-
- BUFFERED = {'BufferedWriter', 'BufferedReader'}
- TextIOWrapper = 'TextIOWrapper'
- FileIO = 'FileIO'
- BufferedWriter = 'BufferedWriter'
-
-
- def _generic_io_transform(node, name, cls):
- '''Transform the given name, by adding the given *class* as a member of the node.'''
-
- io_module = astroid.MANAGER.ast_from_module_name('_io')
- attribute_object = io_module[cls]
- instance = attribute_object.instantiate_class()
- node.locals[name] = [instance]
-
-
- def _transform_text_io_wrapper(node):
- # This is not always correct, since it can vary with the type of the descriptor,
- # being stdout, stderr or stdin. But we cannot get access to the name of the
- # stream, which is why we are using the BufferedWriter class as a default
- # value
- return _generic_io_transform(node, name='buffer', cls=BufferedWriter)
-
-
- def _transform_buffered(node):
- return _generic_io_transform(node, name='raw', cls=FileIO)
-
-
- astroid.MANAGER.register_transform(astroid.ClassDef,
- _transform_buffered,
- lambda node: node.name in BUFFERED)
- astroid.MANAGER.register_transform(astroid.ClassDef,
- _transform_text_io_wrapper,
- lambda node: node.name == TextIOWrapper)
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