comparison fasta2rdf/fastatordf.py @ 6:ec73c34af97b

FASTA2RDF

6:ec73c34af97b

#!/usr/bin/env python3.4
# Author: Jasper Jan Koehorst
# Date created: Jan 22 2015
# Function: generation of a RDF file from a genome fasta file

def delete_galaxy():
	import sys
	for index, path in enumerate(sys.path):
		if "galaxy-dist/" in path:
			sys.path[index] = ''

#Some modules that are required by RDFLIB are also in galaxy, this messes up the RDF import function.
delete_galaxy()

# from io import StringIO
from rdflib import Graph, URIRef, Literal,Namespace, RDF,RDFS,OWL, plugin
# import rdflib
from rdflib.store import Store
import sys

store = plugin.get('IOMemory', Store)()

global URI
URI = "http://csb.wur.nl/genome/"
global seeAlso
seeAlso = "rdfs:seeAlso"
global coreURI
coreURI = Namespace(URI)

def createClass(uri):
	genomeGraph.add((uri,RDF.type,OWL.Class))
	genomeGraph.add((uri,RDFS.subClassOf,OWL.Thing))
	return uri

def fasta_parser(input_file):
	createClass(coreURI["Genome"])            #Genome class
	createClass(coreURI["Type"])                #Type class (Chr,Pls,Scaffold)

	genomeDict = {}
	
	#requires chromosome_1, chromosome_2, chromosome_1... #For multiple scaffolds
# 	regex = re.compile('\[type=(.*?)\]')
	sequence = ""
	genomeID = sys.argv[sys.argv.index('-idtag')+1].replace(" ","_")
	if genomeID == 'None':
		genomeID = sys.argv[sys.argv.index('-id_alternative')+1].replace(" ","_").replace(".","_")

	genomeURI = coreURI[genomeID]
	for index, element in enumerate(sys.argv):
		if '-organism' == element:
			genomeGraph.add((genomeURI, coreURI["organism"] , Literal(sys.argv[index+1])))
		if '-ncbi_taxid' == element:
			genomeGraph.add((genomeURI, coreURI["taxonomy"] , Literal(sys.argv[index+1])))
		if '-idtag' == element:
			genomeGraph.add((genomeURI, coreURI["id_tag"] , Literal(sys.argv[index+1])))
		if '-ids' == element:
			genomeGraph.add((genomeURI, coreURI["id_tag"] , Literal(sys.argv[index+1])))

	genomeDict[genomeID] = {}
	# typDict = {"plasmid":0,"scaffold":0,"chromosome":0}
	
	#Generating genome dictionary
	data = open(input_file).readlines()
	fastadict = {}
	key = ""
	for index, line in enumerate(data):
		if ">" == line[0]:
			key = line.strip(">").strip()
			fastadict[key] = ""
		else:
			fastadict[key] += line.strip()

	# for line in fastadict:
		# typ = regex.findall(line)
		# value = 0
		#If something is found
		# if len(typ) > 0:
			# typ = typ[0]
		#If something is not found
		# elif typ == []:
		# typ = "scaffold"
		#If something is found but does not contain a value
		# elif "_" in typ:
			# value = typ.split("_")[-1]
			# try:
				# value = int(value)
			# except:
				# value = 1
				#Not a integer
		
		#If a value is not given it is automatically assigned as the first one
		#If a value is given...
		# if value > -1:
			#If a second scaffold of a chromosome_1 is found
		# if typ in genomeDict[genome]:
			#Retrieve how many					
			# value = len(genomeDict[genome][typ]) + 1
			# genomeDict[genome][typ]["scaffold_"+str(value)] = {"contig":fastadict[line]}
		# else:
			# genomeDict[genome][typ] = {}
			# genomeDict[genome][typ]["scaffold_1"] = {"contig":fastadict[line]}

	#Genome dictionary to TTL
	genomeClass = createClass(coreURI["Genome"])
	typeClass = createClass(coreURI["DnaObject"])
	for index, genome in enumerate(fastadict):
		# for typ in genomeDict[genome]:
			# for scaf in genomeDict[genome][typ]:
				# for con in genomeDict[genome][typ][scaf]:
					#A note is required here...
					#Due to RDF performances we are reducing the amount of triples needed from a genome to a contig.
					#Previously it was
					# Genome > Class > Scaffold > Contig
					#Now it will be
					# Genome > Class/Scaffold/Contig
					#typeURI = coreURI[genome + "/" + typ]
					#scaffoldURI = coreURI[genome + "/" + typ + "/" + scaf]
					#Was contigURI
					typeURI = coreURI[genomeID + "/dnaobject_" + str(index)] # + "/" + scaf + "/" + con]
					# sequence = genomeDict[genome][typ][scaf][con]
					sequence = fastadict[genome]
					genomeGraph.add((genomeURI, coreURI["dnaobject"] , typeURI))
					genomeGraph.add((genomeURI, coreURI["sourcedb"], Literal(sys.argv[sys.argv.index("-sourcedb")+1])))
					genomeGraph.add((typeURI, coreURI["sequence"] ,  Literal(sequence)))
					genomeGraph.add((typeURI, coreURI["header"], Literal(genome)))
					genomeGraph.add((typeURI, coreURI["sourcedb"], Literal(sys.argv[sys.argv.index("-sourcedb")+1])))
					genomeGraph.add((genomeURI, RDF.type,genomeClass))
					genomeGraph.add((typeURI, RDF.type,typeClass))

def save():
	data = genomeGraph.serialize(format='turtle')
	open(sys.argv[sys.argv.index("-output")+1],"wb").write(data)

def main():
	store = plugin.get('IOMemory', Store)()
	global genomeGraph
	genomeGraph = Graph(store,URIRef(URI))
	genomeGraph.bind("ssb",coreURI)
	input_file = sys.argv[sys.argv.index("-input")+1]
	fasta_parser(input_file)
	save()

if __name__ == '__main__':
	main()