Add get_all_channels

handel/interface.py

@@ -289,9 +289,16 @@ def get_module_channel_at(alias, index):
 
 
 def get_module_channels(alias):
+    """Return the module channels properly indexed."""
     number_of_channels = get_module_number_of_channels(alias)
-    return [get_module_channel_at(alias, index)
-            for index in range(number_of_channels)]
+    return tuple(
+        get_module_channel_at(alias, index)
+        for index in range(number_of_channels))
+
+
+def get_all_channels():
+    """Return the indexed channels grouped by modules."""
+    return tuple(get_module_channels(alias) for alias in get_modules())
 
 
 # Not exposed