50 lines
1.4 KiB
Python
50 lines
1.4 KiB
Python
# Copyright 2018 Canonical Ltd.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
"""Functions to support converting async function to a sync equivalent."""
|
|
import asyncio
|
|
from pkgutil import extend_path
|
|
|
|
|
|
__path__ = extend_path(__path__, __name__)
|
|
|
|
|
|
def run(*steps):
|
|
"""Run the given steps in an asyncio loop.
|
|
|
|
:returns: The result of the asyncio.Task
|
|
:rtype: Any
|
|
"""
|
|
if not steps:
|
|
return
|
|
loop = asyncio.get_event_loop()
|
|
|
|
for step in steps:
|
|
task = loop.create_task(step)
|
|
loop.run_until_complete(asyncio.wait([task], loop=loop))
|
|
return task.result()
|
|
|
|
|
|
def sync_wrapper(f):
|
|
"""Convert the given async function into a sync function.
|
|
|
|
:returns: The de-async'd function
|
|
:rtype: function
|
|
"""
|
|
def _wrapper(*args, **kwargs):
|
|
async def _run_it():
|
|
return await f(*args, **kwargs)
|
|
return run(_run_it())
|
|
return _wrapper
|