Merge branch 'simgrid-topo_simplification'

diff --cc examples/platforms/supernode.py
index db5ee34,a6002a5..b18d2a1
--- 1/examples/platforms/supernode.py
--- 2/examples/platforms/supernode.py
+++ b/examples/platforms/supernode.py
@@@ -14,8 -16,13 +16,12 @@@
  import sys
  import subprocess
  import pandas
 -import matplotlib as mpl
  import matplotlib.pyplot as plt
  import networkx as nx
+ import argparse
+ import tempfile
+ import os
+ 
  try:
      from palettable.colorbrewer.qualitative import Set1_9
      colors = Set1_9.hex_colors