# This function modifies the graph of tasks by adding or removing
# successors to comm0
comm0.on_this_start_cb(lambda t: switch(t, [jupiter, fafard], [exec1,exec2]))
# This function modifies the graph of tasks by adding or removing
# successors to comm0
comm0.on_this_start_cb(lambda t: switch(t, [jupiter, fafard], [exec1,exec2]))