# Path: google/cloud/ndb/exceptions.py
# class Error(Exception):
# class ContextError(Error):
# class BadValueError(Error):
# class BadArgumentError(Error):
# class BadRequestError(Error):
# class Rollback(Error):
# class BadQueryError(Error):
# class BadFilterError(Error):
# class NoLongerImplementedError(NotImplementedError):
# class Cancelled(Error):
# class NestedRetryException(Error):
#     def __init__(self):
#     def __init__(self, filter):
#     def __init__(self):
# 
# Path: google/cloud/ndb/_retry.py
# _DEFAULT_INITIAL_DELAY = 1.0  # seconds
# _DEFAULT_MAXIMUM_DELAY = 60.0  # seconds
# _DEFAULT_DELAY_MULTIPLIER = 2.0
# _DEFAULT_RETRIES = 3
# TRANSIENT_ERRORS = (
#     core_exceptions.ServiceUnavailable,
#     core_exceptions.InternalServerError,
#     core_exceptions.Aborted,
#     core_exceptions.Unknown,
# )
# def wraps_safely(obj, attr_names=functools.WRAPPER_ASSIGNMENTS):
# def retry_async(callback, retries=_DEFAULT_RETRIES):
#     def retry_wrapper(*args, **kwargs):
# def is_transient_error(error):
# 
# Path: google/cloud/ndb/tasklets.py
# class Future(object):
# class _TaskletFuture(Future):
# class _MultiFuture(Future):
# class Return(Exception):
# class QueueFuture(object):
# class ReducingFuture(object):
# class SerialQueueFuture(object):
#     def __init__(self, info="Unknown"):
#     def __repr__(self):
#     def done(self):
#     def running(self):
#     def wait(self):
#     def check_success(self):
#     def set_result(self, result):
#     def set_exception(self, exception):
#     def _finish(self):
#     def result(self):
#     def exception(self):
#     def get_traceback(self):
#     def add_done_callback(self, callback):
#     def cancel(self):
#     def cancelled(self):
#     def wait_any(futures):
#     def wait_all(futures):
#     def __init__(self, generator, context, info="Unknown"):
#     def _advance_tasklet(self, send_value=None, error=None):
#         def done_callback(yielded):
#     def cancel(self):
# def _get_return_value(stop):
#     def __init__(self, dependencies):
#     def __repr__(self):
#     def _dependency_done(self, dependency):
#     def cancel(self):
# def tasklet(wrapped):
#     def tasklet_wrapper(*args, **kwargs):
# def wait_any(futures):
# def wait_all(futures):
# def sleep(seconds):
# def add_flow_exception(*args, **kwargs):
# def make_context(*args, **kwargs):
# def make_default_context(*args, **kwargs):
#     def __init__(self, *args, **kwargs):
#     def __init__(self, *args, **kwargs):
#     def __init__(self, *args, **kwargs):
# def set_context(*args, **kwargs):
# def synctasklet(wrapped):
#     def synctasklet_wrapper(*args, **kwargs):
# def toplevel(wrapped):
#     def toplevel_wrapper(*args, **kwargs):
# 
# Path: google/cloud/ndb/utils.py
# TRUTHY_STRINGS = {"t", "true", "y", "yes", "on", "1"}
# DEBUG = asbool(os.environ.get("NDB_DEBUG", False))
# def asbool(value):
# def code_info(*args, **kwargs):
# def decorator(*args, **kwargs):
# def frame_info(*args, **kwargs):
# def func_info(*args, **kwargs):
# def gen_info(*args, **kwargs):
# def get_stack(*args, **kwargs):
# def logging_debug(log, message, *args, **kwargs):
#     def __init__(self, **kwargs):
#     def __call__(self, wrapped):
#         def wrapper(*args, **kwargs):
# def positional(max_pos_args):
#     def positional_decorator(wrapped):
#         def positional_wrapper(*args, **kwds):
# def tweak_logging(*args, **kwargs):
# def wrapping(*args, **kwargs):
# class keyword_only(object):


import functools
import logging
from google.cloud.ndb import exceptions
from google.cloud.ndb import _retry
from google.cloud.ndb import tasklets
from google.cloud.ndb import utils
        from google.cloud.ndb import context as context_module
            from google.cloud.ndb import context as context_module
    from google.cloud.ndb import context as context_module
    from google.cloud.ndb import context as context_module
    from google.cloud.ndb import _datastore_api
            from google.cloud.ndb import context as context_module
    if new_context is None:
        transaction_return_value = transaction_async_(*args)
    else:
        with new_context.use() as context:
            transaction_return_value = transaction_async_(*args)
            context.flush()
    return transaction_return_value


def transaction_async_(
    callback,
    retries=_retry._DEFAULT_RETRIES,
    read_only=False,
    join=False,
    xg=True,
    propagation=None,
):
    """Run a callback in a transaction.

    This is the asynchronous version of :func:`transaction`.
    """
    # Avoid circular import in Python 2.7

    if propagation is not None:
        raise exceptions.NoLongerImplementedError()

    context = context_module.get_context()
    if context.transaction:
        if join:
            result = callback()

# Path: google/cloud/ndb/exceptions.py
# class Error(Exception):
# class ContextError(Error):
# class BadValueError(Error):
# class BadArgumentError(Error):
# class BadRequestError(Error):
# class Rollback(Error):
# class BadQueryError(Error):
# class BadFilterError(Error):
# class NoLongerImplementedError(NotImplementedError):
# class Cancelled(Error):
# class NestedRetryException(Error):
#     def __init__(self):
#     def __init__(self, filter):
#     def __init__(self):
# 
# Path: google/cloud/ndb/_retry.py
# _DEFAULT_INITIAL_DELAY = 1.0  # seconds
# _DEFAULT_MAXIMUM_DELAY = 60.0  # seconds
# _DEFAULT_DELAY_MULTIPLIER = 2.0
# _DEFAULT_RETRIES = 3
# TRANSIENT_ERRORS = (
#     core_exceptions.ServiceUnavailable,
#     core_exceptions.InternalServerError,
#     core_exceptions.Aborted,
#     core_exceptions.Unknown,
# )
# def wraps_safely(obj, attr_names=functools.WRAPPER_ASSIGNMENTS):
# def retry_async(callback, retries=_DEFAULT_RETRIES):
#     def retry_wrapper(*args, **kwargs):
# def is_transient_error(error):
# 
# Path: google/cloud/ndb/tasklets.py
# class Future(object):
# class _TaskletFuture(Future):
# class _MultiFuture(Future):
# class Return(Exception):
# class QueueFuture(object):
# class ReducingFuture(object):
# class SerialQueueFuture(object):
#     def __init__(self, info="Unknown"):
#     def __repr__(self):
#     def done(self):
#     def running(self):
#     def wait(self):
#     def check_success(self):
#     def set_result(self, result):
#     def set_exception(self, exception):
#     def _finish(self):
#     def result(self):
#     def exception(self):
#     def get_traceback(self):
#     def add_done_callback(self, callback):
#     def cancel(self):
#     def cancelled(self):
#     def wait_any(futures):
#     def wait_all(futures):
#     def __init__(self, generator, context, info="Unknown"):
#     def _advance_tasklet(self, send_value=None, error=None):
#         def done_callback(yielded):
#     def cancel(self):
# def _get_return_value(stop):
#     def __init__(self, dependencies):
#     def __repr__(self):
#     def _dependency_done(self, dependency):
#     def cancel(self):
# def tasklet(wrapped):
#     def tasklet_wrapper(*args, **kwargs):
# def wait_any(futures):
# def wait_all(futures):
# def sleep(seconds):
# def add_flow_exception(*args, **kwargs):
# def make_context(*args, **kwargs):
# def make_default_context(*args, **kwargs):
#     def __init__(self, *args, **kwargs):
#     def __init__(self, *args, **kwargs):
#     def __init__(self, *args, **kwargs):
# def set_context(*args, **kwargs):
# def synctasklet(wrapped):
#     def synctasklet_wrapper(*args, **kwargs):
# def toplevel(wrapped):
#     def toplevel_wrapper(*args, **kwargs):
# 
# Path: google/cloud/ndb/utils.py
# TRUTHY_STRINGS = {"t", "true", "y", "yes", "on", "1"}
# DEBUG = asbool(os.environ.get("NDB_DEBUG", False))
# def asbool(value):
# def code_info(*args, **kwargs):
# def decorator(*args, **kwargs):
# def frame_info(*args, **kwargs):
# def func_info(*args, **kwargs):
# def gen_info(*args, **kwargs):
# def get_stack(*args, **kwargs):
# def logging_debug(log, message, *args, **kwargs):
#     def __init__(self, **kwargs):
#     def __call__(self, wrapped):
#         def wrapper(*args, **kwargs):
# def positional(max_pos_args):
#     def positional_decorator(wrapped):
#         def positional_wrapper(*args, **kwds):
# def tweak_logging(*args, **kwargs):
# def wrapping(*args, **kwargs):
# class keyword_only(object):


# Path: google/cloud/ndb/_transaction.py
import functools
import logging
from google.cloud.ndb import exceptions
from google.cloud.ndb import _retry
from google.cloud.ndb import tasklets
from google.cloud.ndb import utils
        from google.cloud.ndb import context as context_module
            from google.cloud.ndb import context as context_module
    from google.cloud.ndb import context as context_module
    from google.cloud.ndb import context as context_module
    from google.cloud.ndb import _datastore_api
            from google.cloud.ndb import context as context_module

    if new_context is None:
        transaction_return_value = transaction_async_(*args)
    else:
        with new_context.use() as context:
            transaction_return_value = transaction_async_(*args)
            context.flush()
    return transaction_return_value


def transaction_async_(
    callback,
    retries=_retry._DEFAULT_RETRIES,
    read_only=False,
    join=False,
    xg=True,
    propagation=None,
):
    """Run a callback in a transaction.

    This is the asynchronous version of :func:`transaction`.
    """
    # Avoid circular import in Python 2.7

    if propagation is not None:
        raise exceptions.NoLongerImplementedError()

    context = context_module.get_context()
    if context.transaction:
        if join:
            result = callback()

            if not isinstance(result, tasklets.Future):