updated contents from Atlas repo

sequences/slice_viewer.py

@@ -0,0 +1,38 @@
+"""
+Extended slicing:
+
+    >>> s = SliceViewer()
+    >>> s[1]
+    1
+    >>> s[:]
+    slice(None, None, None)
+    >>> s[1:2]
+    slice(1, 2, None)
+    >>> s[1:2:3]
+    slice(1, 2, 3)
+    >>> s[1:2:3:4]
+    Traceback (most recent call last):
+      ...
+    SyntaxError: invalid syntax
+
+N-dimensional indexing:
+
+    >>> s[1, 2]
+    (1, 2)
+
+N-dimensional slicing:
+
+    >>> s[1:3, 2]
+    (slice(1, 3, None), 2)
+    >>> s[1, :2:]
+    (1, slice(None, 2, None))
+    >>> s[:, :]
+    (slice(None, None, None), slice(None, None, None))
+
+"""
+
+
+class SliceViewer:
+
+	def __getitem__(self, position):
+		return position