本文整理汇总了Python中contextlib.ExitStack.pop_all方法的典型用法代码示例。如果您正苦于以下问题：Python ExitStack.pop_all方法的具体用法？Python ExitStack.pop_all怎么用？Python ExitStack.pop_all使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类contextlib.ExitStack的用法示例。
在下文中一共展示了ExitStack.pop_all方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: __init__
# 需要导入模块: from contextlib import ExitStack [as 别名]
# 或者: from contextlib.ExitStack import pop_all [as 别名]
class State:
def __init__(self):
# Variables which manage state transitions.
self._next = deque()
self._debug_step = 1
# Manage all resources so they get cleaned up whenever the state
# machine exits for any reason.
self.resources = ExitStack()
def close(self):
# Transfer all resources to a new ExitStack, and release them from
# there. That way, if .close() gets called more than once, only the
# first call will release the resources, while subsequent ones will
# no-op.
self.resources.pop_all().close()
def __enter__(self):
return self
def __exit__(self, *exception):
self.close()
# Don't suppress any exceptions.
return False
def __del__(self):
self.close()
def __iter__(self):
return self
def _pop(self):
step = self._next.popleft()
# step could be a partial or a method.
name = getattr(step, 'func', step).__name__
log.debug('-> [{:2}] {}'.format(self._debug_step, name))
return step, name
def __next__(self):
try:
step, name = self._pop()
step()
self._debug_step += 1
except IndexError:
# Do not chain the exception.
self.close()
raise StopIteration from None
except:
log.exception('uncaught exception in state machine')
self.close()
raise
def run_thru(self, stop_after):
"""Partially run the state machine.
Note that any resources maintained by this state machine are
*not* automatically cleaned up when .run_thru() completes,
unless an exception occurrs, because execution can be continued.
Call .close() explicitly to release the resources.
:param stop_after: Name of method to run the state machine
through. In other words, the state machine runs until the
named method completes.
"""
while True:
try:
step, name = self._pop()
except (StopIteration, IndexError):
# We're done.
break
try:
step()
except:
self.close()
raise
self._debug_step += 1
if name == stop_after:
break
def run_until(self, stop_before):
"""Partially run the state machine.
Note that any resources maintained by this state machine are
*not* automatically cleaned up when .run_until() completes,
unless an exception occurs, because execution can be continued.
Call .close() explicitly to release the resources.
:param stop_before: Name of method that the state machine is run
until the method is reached. Unlike `run_thru()` the named
method is not run.
"""
while True:
try:
step, name = self._pop()
except (StopIteration, IndexError):
# We're done.
break
if name == stop_before:
# Stop executing, but not before we push the last state back
# onto the deque. Otherwise, resuming the state machine would
# skip this step.
#.........这里部分代码省略.........