add xlib.avecl

xlib/avecl/_internal/info/StackInfo.py

@@ -0,0 +1,37 @@
+from ..AShape import AShape
+
+class StackInfo:
+    __slots__ = ['o_shape', 'axis']
+
+    def __init__(self, shape, axis, stack_count):
+        """
+        Stack info
+
+        arguments
+
+            shape           AShape
+
+            axis            Int
+
+            stack_count     Int
+
+        errors during the construction:
+
+            ValueError
+
+        result:
+
+            .o_shape       AShape
+
+            .axis     Int       positive axis argument
+        """
+        if axis < 0:
+            axis = shape.ndim + 1 + axis
+        if axis < 0 or axis > shape.ndim:
+            raise ValueError(f'Wrong axis {axis}')
+
+        if stack_count <= 0:
+            raise ValueError(f'Invalid stack_count {stack_count}')
+
+        self.o_shape = AShape( tuple(shape)[0:axis] + (stack_count,) + tuple(shape)[axis:] )
+        self.axis = axis