本文整理汇总了Python中history.History.back方法的典型用法代码示例。如果您正苦于以下问题：Python History.back方法的具体用法？Python History.back怎么用？Python History.back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history.History的用法示例。
在下文中一共展示了History.back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 history import History [as 别名]
# 或者: from history.History import back [as 别名]
#.........这里部分代码省略.........
"""Return subjects of current if predicate given, return current subjects-predicates if no uri is given."""
if uri:
ref = self.model.to_uriref(uri)
if ref and self.current:
return self.model.get_subjects(ref, self.current)
elif self.current:
return self.model.get_reverse_properties(self.current)
return None
def go(self, uri):
"""Set current to given resource uri, or to None if no uri is given."""
if uri:
ref = self.model.to_uriref(uri)
self.model.load(str(ref))
if self.model.contains_resource(ref):
self.current = ref
self.history.push(ref)
return ref
return False
else:
self.current = None
self.history.push(None)
return None
def get_objects(self, uri):
if uri:
ref = self.model.to_uriref(uri)
if ref and self.current:
return self.model.get_resource_objects(self.current, ref)
return False
else:
return False
def fw(self, uri, index=0):
"""Set current to object of given predicate of current."""
if uri:
ref = self.model.to_uriref(uri)
if ref and self.current:
objs = self.model.get_resource_objects(self.current, ref)
if len(objs) > 0:
obj = objs[index]
self.model.load(str(obj))
self.current = obj
self.history.push(obj)
return obj
return False
else:
return False
def get_subjects(self, uri):
if uri:
ref = self.model.to_uriref(uri)
if ref and self.current:
return self.model.get_subjects(ref, self.current)
return False
else:
return False
def bw(self, uri, index=0):
"""Set current to subject of given predicate pointing to current."""
if uri:
ref = self.model.to_uriref(uri)
if ref and self.current:
subjs = self.model.get_subjects(ref, self.current)
if len(subjs) > 0:
subj = subjs[index]
self.model.load(str(subj))
self.current = subj
self.history.push(subj)
return subj
return False
else:
return False
def forward(self):
ref = self.history.forward()
if ref != False:
self.current = ref
return ref
def back(self):
ref = self.history.back()
if ref != False:
self.current = ref
return ref
def this(self):
"""Return current."""
return self.current
def pred(self):
"""Return predicates of current."""
return self.model.pred(self.current)
def types(self):
"""Return all terms that exist as objects of rdf:type."""
return self.model.types()
def norm(self, ref):
return self.model.norm(ref)