[Python] Number of co-occurences / draft

COFM.py

def COFM(comat,normal=True):
	CoFreq = []
	for sp1 in xrange(len(comat)-1):
		for sp2 in xrange(sp1,len(comat)):
			NCo = 0
			for nsite in xrange(len(comat[0])):
				if comat[sp1][nsite]*comat[sp2][nsite] > 0:
					NCo += 1
                        if normal:
                            NCo /= len(comat[0])
			CoFreq.append(NCo)
	return CoFreq
	
CoMat = [[0,0,1,0],[0,2,1,0],[1,1,0,1],[1,0,0,0]]

print COFM(CoMat)