def parse_pRDF(f):
	pRDFs={}
	count=0
	for line in open(f).readlines():
		words=line.split()
		if words[0]=="dstep":
			dstep=locale.atof(words[1])
			continue
		elif words[0]=="nstep":
			nstep=locale.atof(words[1])
			continue
		else:
			atom_type = words[0]
			pRDF=[]
			for word in words[1:]:
				pRDF.append(locale.atof(word))
			pRDFs[atom_type]=pRDF
	return (pRDFs,dstep)