python 1countPCCandFilterPPI.py  FDR.0.00001.DEGs.cal.FPKM.Log.txt(gene expression matrix) HPRD.txt(PPI data base) step1.pcc.txt # calculate the PCC between PPIs
python 2FilterPCC.py group.txt(group information of each gene) step1.pcc.txt -0.8 0.8 NodeAttribution.txt EdgeAttribution.txt Network.txt # filter PPIs by cuf offs
python 3FeedBackLoop.py EdgeAttribution.txt  NodeAttribution.txt step3NodeAttribution.txt step3Network.txt  step3EdgeAttribution.txt # extract the feedback loops