示例#1
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文件: model.py 项目: wbryant/cobrapy
    def __enter__(self):
        """Record all future changes to the model, undoing them when a call to
        __exit__ is received"""

        # Create a new context and add it to the stack
        try:
            self._contexts.append(HistoryManager())
        except AttributeError:
            self._contexts = [HistoryManager()]

        return self
示例#2
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 def __init__(self, model):
     self.history_manager = None
     self._model = model
     self.variables = {}
     self.constraints = {}
     self.objective = None
     self.original_objective = model.solver.objective
     self._contexts = [HistoryManager()]
     self.transaction_id = None
示例#3
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 def reset(self):
     """
     Removes all constraints and variables from the cache.
     """
     variables = list(self.variables.keys())
     constraints = list(self.constraints.keys())
     while len(self._contexts) > 0:
         manager = self._contexts.pop()
         manager.reset()
     self._contexts.append(HistoryManager())
     assert all(var_id not in self._model.solver.variables for var_id in variables)
     assert all(const_id not in self._model.solver.constraints for const_id in constraints)
     self.variables = {}
     self.constraints = {}
     self._model.objective = self.original_objective
     self.objective = None
示例#4
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 def begin_transaction(self):
     """
     Creates a time point. If rollback is called, the variables and constrains will be reverted to this point.
     """
     self._contexts.append(HistoryManager())