28 lines
796 B
Python
28 lines
796 B
Python
# structure.py
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class Structure:
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_fields = ()
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def __setattr__(self, name, value):
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if name.startswith('_') or name in self._fields:
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super().__setattr__(name, value)
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else:
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raise AttributeError('No attribute %s' % name)
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def __repr__(self):
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return '%s(%s)' % (type(self).__name__,
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', '.join(repr(getattr(self, name)) for name in self._fields))
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@classmethod
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def create_init(cls):
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'''
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Create an __init__ method from _fields
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'''
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args = ','.join(cls._fields)
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code = f'def __init__(self, {args}):\n'
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for name in cls._fields:
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code += f' self.{name} = {name}\n'
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locs = { }
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exec(code, locs)
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cls.__init__ = locs['__init__']
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