def main():
	Filea = open("columna.txt")
	Fileb = open("columnb.txt")
	Filec = open("columnc.txt")
	Filed = open("columnd.txt")
	for x,y,z,w in izip(Filea, Fileb, Filec, Filed): #for c in 'a b c d'.split()):
		print x[0:-1],y[0:-1],z[0:-1],w[0:-1]




wanted "x[0:-1]" , "y[0:-1]" etc ....

"\"%s\" , \"%s\" , \"%s\" , \"%s\"" % (x[0:-1],y[0:-1],z[0:-1],w[0:-1])