Viewing file:  NTSerializer.py (1.23 KB) -rw-r--r--
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#$Id: NTSerializer.py,v 1.6 2003/10/29 15:25:24 kendall Exp $
from rdflib.syntax.serializers import Serializer
class NTSerializer(Serializer):
def __init__(self, store):
"""
I serialize RDF graphs in NTriples format.
"""
super(NTSerializer, self).__init__(store)
def serialize(self, stream, base=None, encoding=None, **args):
if base is not None:
print "TODO: NTSerializer does not support base"
encoding = self.encoding
write = lambda triple: stream.write((triple[0].n3() + u" " + \
triple[1].n3() + u" " + _xmlcharref_encode(triple[2].n3()) + u".\n").encode(encoding, "replace"))
map(write, self.store)
# from http://code.activestate.com/recipes/303668/
def _xmlcharref_encode(unicode_data, encoding="ascii"):
"""Emulate Python 2.3's 'xmlcharrefreplace' encoding error handler."""
chars = []
# Step through the unicode_data string one character at a time in
# order to catch unencodable characters:
for char in unicode_data:
try:
chars.append(char.encode(encoding, 'strict'))
except UnicodeError:
chars.append('\u%04X' % ord(char))
return ''.join(chars)
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