Ref: Add Shape.reversed

phiml/math/_shape.py

@@ -927,6 +927,10 @@ def non_channel(self):
     def non_primal(self):
         return self if self.dim_type not in PRIMAL_TYPES else EMPTY_SHAPE
 
+    @property
+    def reversed(self):
+        return self
+
     def __repr__(self):
         if self.slice_names:
             items_str = ",".join(self.slice_names)
@@ -1357,6 +1361,10 @@ def non_channel(self):
     def non_primal(self):
         return self if self.dim_type not in PRIMAL_TYPES else EMPTY_SHAPE
 
+    @property
+    def reversed(self):
+        return PureShape(self.dim_type, {k: v for k, v in reversed(self.dims.items())})
+
     def __repr__(self):
         strings = [repr(dim)[1:-1] for dim in self.dims.values()]
         return '(' + ', '.join(strings) + ')'
@@ -1787,6 +1795,11 @@ def non_channel(self):
         dims = {n: dim for n, dim in self.dims.items() if dim.dim_type != CHANNEL_DIM}
         return MixedShape(self.batch, self.dual, self.instance, self.spatial, EMPTY_SHAPE, dims) if dims else EMPTY_SHAPE
 
+    @property
+    def reversed(self):
+        dims = {k: v for k, v in reversed(self.dims.items())}
+        return MixedShape(self.batch, self.dual, self.instance, self.spatial, self.channel, dims)
+
     def __repr__(self):
         return '(' + ', '.join([repr(dim)[1:-1] for dim in self.dims.values()]) + ')'