python3 - 2to3 + miscell obvious tweaks
[sfa.git] / sfa / rspecs / elements / element.py
1 class Element(dict):
2
3     fields = {}
4
5     def __init__(self, fields=None, element=None, keys=None):
6         if fields is None:
7             fields = {}
8         self.element = element
9         dict.__init__(self, dict.fromkeys(self.fields))
10         if not keys:
11             keys = list(fields.keys())
12         for key in keys:
13             if key in fields:
14                 self[key] = fields[key]
15
16     def __getattr__(self, name):
17         if hasattr(self.__dict__, name):
18             return getattr(self.__dict__, name)
19         elif hasattr(self.element, name):
20             return getattr(self.element, name)
21         else:
22             raise AttributeError("class Element of type {} has no attribute {}"
23                                  .format(self.__class__.__name__, name))