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# ==================================================================================== # |
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# decorator.py - This file is part of the YFrake package. # |
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# ------------------------------------------------------------------------------------ # |
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# # |
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# MIT License # |
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# # |
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# Copyright (c) 2022 Mattias Aabmets # |
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# # |
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# Permission is hereby granted, free of charge, to any person obtaining a copy # |
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# of this software and associated documentation files (the "Software"), to deal # |
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# in the Software without restriction, including without limitation the rights # |
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # |
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# copies of the Software, and to permit persons to whom the Software is # |
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# furnished to do so, subject to the following conditions: # |
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# # |
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# The above copyright notice and this permission notice shall be included in all # |
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# copies or substantial portions of the Software. # |
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# # |
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # |
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # |
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # |
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # |
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # |
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE # |
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# SOFTWARE. # |
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# # |
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# ==================================================================================== # |
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from . import session |
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import asyncio |
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import inspect |
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import sys |
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# ==================================================================================== # |
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class Decorator: |
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_err_sess_already_open = 'Session has already been opened! (YFrake)' |
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_async_mode: bool = False |
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# ------------------------------------------------------------------------------------ # |
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@classmethod |
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def session(cls, func): |
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""" |
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This decorator opens and closes a session to |
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the Yahoo Finance API servers. Other methods |
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of the client object can be called only when the |
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decorated function or coroutine has not returned. |
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""" |
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if session.is_locked(): |
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raise RuntimeError(cls._err_sess_already_open) |
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if sys.platform == 'win32': # pragma: no branch |
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policy = asyncio.WindowsSelectorEventLoopPolicy() |
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asyncio.set_event_loop_policy(policy) |
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async def a_inner(*args, **kwargs) -> None: |
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await session.open_async() |
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await func(*args, **kwargs) |
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await session.close_async() |
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def t_inner(*args, **kwargs) -> None: |
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session.open_thread() |
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func(*args, **kwargs) |
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session.close_thread() |
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cls._async_mode = inspect.iscoroutinefunction(func) |
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return a_inner if cls._async_mode else t_inner |
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aabmets /
yfrake
