verbose: add stdout flushing for cluster usages

deconvolution/dgraph/AbstractDGFactory.py

 import networkx as nx
+import sys
 from abc import abstractmethod
 from multiprocessing import Pool, Value
 
@@ -13,6 +14,7 @@ def process_node(factory, node):
 
     if factory.verbose:
         print(f"{my_value}: Generating d-graphs")
+        sys.stdout.flush()
 
     # udg generation
     neighbors = list(factory.graph.neighbors(node))
@@ -22,12 +24,14 @@ def process_node(factory, node):
     if factory.verbose:
         print(f"{my_value}: d-graphs generated, starting filtering")
         print(f"{my_value}: {len(dgs)} graphs to filter")
+        sys.stdout.flush()
 
     # udg domination filtering
     dgs = AbstractDGIndex.filter_entry(dgs)
 
     if factory.verbose:
         print(f"{my_value}({factory.nb_nodes}) terminated")
+        sys.stdout.flush()
 
     return node, dgs