本文整理汇总了Python中dpa.ptask.area.PTaskArea.previous方法的典型用法代码示例。如果您正苦于以下问题：Python PTaskArea.previous方法的具体用法？Python PTaskArea.previous怎么用？Python PTaskArea.previous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dpa.ptask.area.PTaskArea的用法示例。
在下文中一共展示了PTaskArea.previous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: _print_ptask_env
# 需要导入模块: from dpa.ptask.area import PTaskArea [as 别名]
# 或者: from dpa.ptask.area.PTaskArea import previous [as 别名]
def _print_ptask_env(self):
# remove any whitespace on the head/tail of the spec
spec = self.spec.strip()
ptask_area = None
if self.version:
spec = PTaskSpec.VERSION.join([spec, str(self.version)])
replace_match = re.match("\.?/([=\w]+)/([=\w]+)/", spec)
# handle 'none' as a valid spec - unset current ptask (set it to root)
if spec.lower() == 'none':
spec = ""
full_spec = PTaskSpec.get(spec)
try:
ptask_area = PTaskArea(full_spec)
except:
pass
# special character '-' indicates use the last set ptask spec
elif spec == "-":
ptask_area = PTaskArea.previous()
# set to a similar ptask with text replacement
elif replace_match:
cur_area_spec = PTaskArea.current().spec
repl_spec = cur_area_spec.replace(
replace_match.group(1), replace_match.group(2))
try:
ptask_area = PTaskArea(repl_spec)
except:
pass
# use the supplied spec relative to the current ptask
else:
relative_to = PTaskArea.current().spec
while ptask_area is None:
try:
full_spec = PTaskSpec.get(spec, relative_to=relative_to)
except PTaskSpecError as e:
raise ActionError(str(e))
try:
# if this is successful, we'll break out of the while
ptask_area = PTaskArea(full_spec)
except PTaskAreaError as e:
# no match, check the parent relative spec
relative_to = PTaskSpec.parent(relative_to)
# there is no parent, break out of the while
if relative_to is None:
break
# dump out commands used for setting the environment for the supplied
# spec.
if not ptask_area:
raise ActionError(
"Could not determine ptask area from: " + str(spec),
)
ptask = None
# delay the db query to this point to prevent multiple, unnecessary db
# queries. if we're at this point, we know there's at least a
# corresponding directory on disk.
if ptask_area.base_spec:
try:
ptask = PTask.get(ptask_area.base_spec)
except PTaskError as e:
pass
if not ptask and ptask_area.spec != "":
raise ActionError("Could not determine ptask from: " + str(spec))
ptask_area.set(shell=self.shell, ptask=ptask)