Added example of creating snapshots with Python in an input file.

docs/source/geometry_snapshots.rst

@@ -36,7 +36,19 @@ The ``#geometry_view:`` command produces either ImageData (.vti) for a per-cell
 Snapshot files
 ==============
 
-The ``#snapshot:`` command produces an ImageData (.vti) snapshot file for each time instance requested. The following are steps to get started with viewing snapshot files in Paraview:
+The ``#snapshot:`` command produces an ImageData (.vti) snapshot file for each time instance requested.
+
+.. tip::
+    You can take advantage of Python scripting to easily create a series of snapshots. For example, to create 30 snapshots starting at time 0.1ns until 3ns in intervals of 0.1ns, insert the following into your input file.
+
+    .. code-block:: none
+
+        #python:
+        for i in range(1, 31):
+            print('#snapshot: x1 y1 z1 x2 y2 z2 dx dy dz {} snapshot{}'.format((i/10)*1e-9, i))
+        #end_python:
+
+The following are steps to get started with viewing snapshot files in Paraview:
 
 #. **Open the file** either from the File menu or toolbar. Paraview should recognise the time series based on the file name and load in all the files.
 #. Click the **Apply** button in the Properties panel. You should see an outline of the snapshot volume.