=============
Usage:
.. code-block:: python
try:
# ABCs live in "collections.abc" in Python >= 3.3
from collections.abc import Coroutine, Generator
except ImportError:
# fall back to import from "backports_abc"
from backports_abc import Coroutine, Generator
You can also install the ABCs into the stdlib by calling the patch()
function:
.. code-block:: python
import backports_abc
backports_abc.patch()
try:
# ABCs live in "collections.abc" in Python >= 3.3
from collections.abc import Coroutine, Generator
except ImportError:
# fall back to import from "collections" in Python <= 3.2
from backports_abc import Coroutine, Generator
Currently, patch()
provides the following names if missing:
collections.abc.Generator
collections.abc.Awaitable
collections.abc.Coroutine
inspect.isawaitable(obj)
All of them are also available directly from the backports_abc
module namespace.
In Python 2.x and Python 3.2, it patches the collections
module
instead of the collections.abc
module. Any names that are already
available when importing this module will not be overwritten.
The names that were previously patched by patch()
can be queried
through the mapping in backports_abc.PATCHED
.
direct wheel building support
make all names available at the module level instead of requiring patching
inspect.iscoroutine()
as it is not ABC basedrequire explicit backports_abc.patch()
call to do the patching
(avoids side-effects on import and allows future configuration)
provide access to patched names through global PATCHED
dict
add ABC based implementations of inspect.iscoroutine() and inspect.isawaitable()
initial public release
provided ABCs: Generator, Coroutine, Awaitable