Initial commit

Solutions/6_3/structure.py

@@ -0,0 +1,30 @@
+# structure.py
+
+import sys
+import inspect
+
+class Structure:
+    _fields = ()
+
+    @staticmethod
+    def _init():
+        locs = sys._getframe(1).f_locals
+        self = locs.pop('self')
+        for name, val in locs.items():
+            setattr(self, name, val)
+
+    def __setattr__(self, name, value):
+        if name.startswith('_') or name in self._fields:
+            super().__setattr__(name, value)
+        else:
+            raise AttributeError('No attribute %s' % name)
+
+    def __repr__(self):
+        return '%s(%s)' % (type(self).__name__,
+                           ', '.join(repr(getattr(self, name)) for name in self._fields))
+
+    @classmethod
+    def set_fields(cls):
+        sig = inspect.signature(cls)
+        cls._fields = tuple(sig.parameters)
+