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opt / alt / python27 / lib64 / python2.7 / site-packages / sqlalchemy / ext / asyncio /

📁 ..
📄 __init__.py(823 B)
📄 __init__.pyc(982 B)
📄 base.py(2.46 KB)
📄 engine.py(26.03 KB)
📄 events.py(1.39 KB)
📄 events.pyc(2.17 KB)
📄 exc.py(639 B)
📄 exc.pyc(1.12 KB)
📄 result.py(20.2 KB)
📄 scoping.py(2.89 KB)
📄 session.py(23.71 KB)

Editing: base.py

# ext/asyncio/base.py
# Copyright (C) 2020-2024 the SQLAlchemy authors and contributors
# <see AUTHORS file>
#
# This module is part of SQLAlchemy and is released under
# the MIT License: https://www.opensource.org/licenses/mit-license.php
import abc
import functools
import weakref

from . import exc as async_exc

class ReversibleProxy:
    # weakref.ref(async proxy object) -> weakref.ref(sync proxied object)
    _proxy_objects = {}
    __slots__ = ("__weakref__",)

def _assign_proxied(self, target):
        if target is not None:
            target_ref = weakref.ref(target, ReversibleProxy._target_gced)
            proxy_ref = weakref.ref(
                self,
                functools.partial(ReversibleProxy._target_gced, target_ref),
            )
            ReversibleProxy._proxy_objects[target_ref] = proxy_ref

return target

@classmethod
    def _target_gced(cls, ref, proxy_ref=None):
        cls._proxy_objects.pop(ref, None)

@classmethod
    def _regenerate_proxy_for_target(cls, target):
        raise NotImplementedError()

@classmethod
    def _retrieve_proxy_for_target(cls, target, regenerate=True):
        try:
            proxy_ref = cls._proxy_objects[weakref.ref(target)]
        except KeyError:
            pass
        else:
            proxy = proxy_ref()
            if proxy is not None:
                return proxy

if regenerate:
            return cls._regenerate_proxy_for_target(target)
        else:
            return None

class StartableContext(abc.ABC):
    __slots__ = ()

@abc.abstractmethod
    async def start(self, is_ctxmanager=False):
        pass

def __await__(self):
        return self.start().__await__()

async def __aenter__(self):
        return await self.start(is_ctxmanager=True)

@abc.abstractmethod
    async def __aexit__(self, type_, value, traceback):
        pass

def _raise_for_not_started(self):
        raise async_exc.AsyncContextNotStarted(
            "%s context has not been started and object has not been awaited."
            % (self.__class__.__name__)
        )

class ProxyComparable(ReversibleProxy):
    __slots__ = ()

def __hash__(self):
        return id(self)

def __eq__(self, other):
        return (
            isinstance(other, self.__class__)
            and self._proxied == other._proxied
        )

def __ne__(self, other):
        return (
            not isinstance(other, self.__class__)
            or self._proxied != other._proxied
        )

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