REF: implement size for 2D compat

Author: jbrockmendel

cyberpandas/base.py

@@ -19,12 +19,20 @@ def _from_sequence(cls, scalars, dtype=None, copy=False):
     def _from_factorized(cls, values, original):
         return cls(values)
 
+    @property
+    def size(self):
+        return self.data.size
+
     @property
     def shape(self):
-        return (len(self.data),)
+        return self.data.shaoe
+
+    @property
+    def ndim(self):
+        return len(self.shape)
 
     def __len__(self):
-        return len(self.data)
+        return self.shape[0]
 
     def __getitem__(self, *args):
         result = operator.getitem(self.data, *args)