fields = {}
- def __init__(self, fields={}, element=None):
+ def __init__(self, fields=None, element=None, keys=None):
+ if fields is None:
+ fields = {}
self.element = element
- dict.__init__(self, self.fields)
- self.update(fields)
+ dict.__init__(self, dict.fromkeys(self.fields))
+ if not keys:
+ keys = fields.keys()
+ for key in keys:
+ if key in fields:
+ self[key] = fields[key]
+ def __getattr__(self, name):
+ if hasattr(self.__dict__, name):
+ return getattr(self.__dict__, name)
+ elif hasattr(self.element, name):
+ return getattr(self.element, name)
+ else:
+ raise AttributeError("class Element of type {} has no attribute {}"
+ .format(self.__class__.__name__, name))