Metadata-Version: 1.1
Name: aiofiles
Version: 0.3.2
Summary: File support for asyncio.
Home-page: https://github.com/Tinche/aiofiles
Author: Tin Tvrtkovic
Author-email: tinchester@gmail.com
License: Apache 2.0
Description: aiofiles: file support for asyncio
        ==================================
        
        .. image:: https://img.shields.io/pypi/v/aiofiles.svg
                :target: https://pypi.python.org/pypi/aiofiles
        
        .. image:: https://travis-ci.org/Tinche/aiofiles.svg?branch=master
                :target: https://travis-ci.org/Tinche/aiofiles
        
        .. image:: https://codecov.io/gh/Tinche/aiofiles/branch/master/graph/badge.svg
                :target: https://codecov.io/gh/Tinche/aiofiles
        
        aiofiles is an Apache2 licensed library, written in Python, for handling local
        disk files in asyncio applications.
        
        Ordinary local file IO is blocking, and cannot easily and portably made
        asynchronous. This means doing file IO may interfere with asyncio applications,
        which shouldn't block the executing thread. aiofiles helps with this by
        introducing asynchronous versions of files that support delegating operations to
        a separate thread pool.
        
        .. code-block:: python
        
            async with aiofiles.open('filename', mode='r') as f:
                contents = await f.read()
            print(contents)
            'My file contents'
        
        Or, using the old syntax:
        
        .. code-block:: python
        
            f = yield from aiofiles.open('filename', mode='r')
            try:
                contents = yield from f.read()
            finally:
                yield from f.close()
            print(contents)
            'My file contents'
        
        Features
        --------
        
        - a file API very similar to Python's standard, blocking API
        - support for buffered and unbuffered binary files, and buffered text files
        - support for async/await (PEP 492) constructs
        
        
        Installation
        ------------
        
        To install aiofiles, simply:
        
        .. code-block:: bash
        
            $ pip install aiofiles
        
        Usage
        -----
        
        Files are opened using the ``aiofiles.open()`` coroutine, which in addition to
        mirroring the builtin ``open`` accepts optional ``loop`` and ``executor``
        arguments. If ``loop`` is absent, the default loop will be used, as per the
        set asyncio policy. If ``executor`` is not specified, the default event loop
        executor will be used.
        
        In case of success, an asynchronous file object is returned with an
        API identical to an ordinary file, except the following methods are coroutines
        and delegate to an executor:
        
        * ``close``
        * ``flush``
        * ``isatty``
        * ``read``
        * ``readall``
        * ``read1``
        * ``readinto``
        * ``readline``
        * ``readlines``
        * ``seek``
        * ``seekable``
        * ``tell``
        * ``truncate``
        * ``writable``
        * ``write``
        * ``writelines``
        
        In case of failure, one of the usual exceptions will be raised.
        
        The ``aiofiles.os`` module contains executor-enabled coroutine versions of
        several useful ``os`` functions that deal with files:
        
        * ``stat``
        * ``sendfile``
        
        Limitations and Differences from the Builtin File API
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
        
        When using Python 3.5 or greater, aiofiles file objects can be used as
        asynchronous context managers. Asynchronous iteration is also supported.
        
        .. code-block:: python
        
            async with aiofiles.open('filename') as f:
                async for line in f:
                    ...
        
        When using Python 3.3 or 3.4, be aware that the closing of a file may block,
        and yielding from a coroutine while exiting from a context manager isn't
        possible, so aiofiles file objects can't be used as (ordinary, non-async)
        context managers. Use the ``try/finally`` construct from the introductory
        section to ensure files are closed.
        
        When using Python 3.3 or 3.4, iteration is also unsupported. To iterate over a
        file, call ``readline`` repeatedly until an empty result is returned. Keep in
        mind ``readline`` doesn't strip newline characters.
        
        .. code-block:: python
        
            f = yield from aiofiles.open('filename')
            try:
                while True:
                    line = yield from f.readline()
                    if not line:
                        break
                    line = line.strip()
                    ...
            finally:
                yield from f.close()
        
        Writing tests for aiofiles
        ~~~~~~~~~~~~~~~~~~~~~~~~~~
        
        Real file IO can be mocked by patching `aiofiles.threadpool.sync_open`
        as desired. The return type also needs to be registered with the
        `aiofiles.threadpool.wrap` dispatcher:
        
        .. code-block:: python
        
            threadpool.wrap.register(mock.MagicMock)(
                lambda *args, **kwargs: threadpool.AsyncBufferedIOBase(*args, **kwargs))
        
            async def test_stuff():
                data = 'data'
                mock_file = mock.MagicMock()
        
                with mock.patch('aiofiles.threadpool.sync_open', return_value=mock_file) as mock_open:
                    async with aiofiles.open('filename', 'w') as f:
                        await f.write(data)
        
                    mock_file.write.assert_called_once_with(data)
        
        History
        ~~~~~~~
        
        0.3.2 (2017-09-23)
        ``````````````````
        - The LICENSE is now included in the sdist.
          `#31 <https://github.com/Tinche/aiofiles/pull/31>`_
        
        0.3.1 (2017-03-10)
        ``````````````````
        
        - Introduced a changelog.
        - ``aiofiles.os.sendfile`` will now work if the standard ``os`` module contains a ``sendfile`` function.
        
        Contributing
        ~~~~~~~~~~~~
        Contributions are very welcome. Tests can be run with ``tox``, please ensure
        the coverage at least stays the same before you submit a pull request.
        
Platform: UNKNOWN
Classifier: Development Status :: 4 - Beta
Classifier: Intended Audience :: Developers
Classifier: License :: OSI Approved :: Apache Software License
Classifier: Programming Language :: Python :: 3.3
Classifier: Programming Language :: Python :: 3.4
Classifier: Topic :: System :: Filesystems
