Python py3compat.b函数代码示例

 def to_key(triple, context):
     "Takes a string; returns key"
     return b("^").join(
         (context,
          triple[i % 3],
          triple[(i + 1) % 3],
          triple[(i + 2) % 3], b("")))  # "" to tac on the trailing ^

 def test_result_fragments(self):
     rdfXml = serialize(self.sourceGraph, self.serializer)
     assert b('<Test rdf:about="http://example.org/data/a">') in rdfXml
     assert b('<rdf:Description rdf:about="http://example.org/data/b">') in rdfXml
     assert b('<name xml:lang="en">Bee</name>') in rdfXml
     assert b('<value rdf:datatype="http://www.w3.org/2001/XMLSchema#integer">3</value>') in rdfXml
     assert b('<BNode rdf:nodeID="') in rdfXml, "expected one identified bnode in serialized graph"

def testFinalNewline():
    """
    http://code.google.com/p/rdflib/issues/detail?id=5
    """
    import sys
    import platform
    if getattr(sys, 'pypy_version_info', None) or platform.system() == 'Java':
        from nose import SkipTest
        raise SkipTest(
            'Testing under pypy and Jython2.5 fails to detect that ' + \
            'IOMemory is a context_aware store')

    graph=Graph()
    graph.add((URIRef("http://ex.org/a"),
               URIRef("http://ex.org/b"),
               URIRef("http://ex.org/c")))

    failed = set()
    for p in rdflib.plugin.plugins(None, rdflib.plugin.Serializer):
        if p.name not in ( 'nquads', 'trix' ):
            v = graph.serialize(format=p.name)
            lines = v.split(b("\n"))
            if b("\n") not in v or (lines[-1]!=b('')):
                failed.add(p.name)
    assert len(failed)==0, "No final newline for formats: '%s'" % failed

 def test_result_fragments_with_base(self):
     rdfXml = serialize(self.sourceGraph, self.serializer, 
                 extra_args={'base':"http://example.org/", 'xml_base':"http://example.org/"})
     assert b('xml:base="http://example.org/"') in rdfXml
     assert b('<Test rdf:about="data/a">') in rdfXml
     assert b('<rdf:Description rdf:about="data/b">') in rdfXml
     assert b('<value rdf:datatype="http://www.w3.org/2001/XMLSchema#integer">3</value>') in rdfXml
     assert b('<BNode rdf:nodeID="') in rdfXml, "expected one identified bnode in serialized graph"

 def test_validating_unquote_raises(self):
     ntriples.validate = True
     uniquot = b("""<http://www.w3.org/People/Berners-Lee/card#cm> <http://xmlns.com/foaf/0.1/name> "R\\u00E4ksm\\u00F6rg\\u00E5s" <http://www.w3.org/People/Berners-Lee/card> .""")
     self.assertRaises(ntriples.ParseError, ntriples.unquote, uniquot)
     uniquot = b("""<http://www.w3.org/People/Berners-Lee/card#cm> <http://xmlns.com/foaf/0.1/name> "R\\\\u00E4ksm\\u00F6rg\\u00E5s" <http://www.w3.org/People/Berners-Lee/card> .""")
     self.assertRaises(ntriples.ParseError, ntriples.unquote, uniquot)
     # revert to default
     ntriples.validate = False

    def remove(self, triple, context):
        (subject, predicate, object) = triple
        assert self.__open, "The Store must be open."
        Store.remove(self, (subject, predicate, object), context)
        _to_string = self._to_string

        if context is not None:
            if context == self:
                context = None
        if subject is not None \
                and predicate is not None \
                and object is not None \
                and context is not None:
            s = _to_string(subject)
            p = _to_string(predicate)
            o = _to_string(object)
            c = _to_string(context)
            value = self.__indices[0].get(bb("%s^%s^%s^%s^" % (c, s, p, o)))
            if value is not None:
                self.__remove((bb(s), bb(p), bb(o)), bb(c))
                self.__needs_sync = True
        else:
            cspo, cpos, cosp = self.__indices
            index, prefix, from_key, results_from_key = self.__lookup(
                                    (subject, predicate, object), context)

            needs_sync = False
            for key in index.match_prefix(prefix):
                c, s, p, o = from_key(key)
                if context is None:
                    contexts_value = index.get(key) or b("")
                    # remove triple from all non quoted contexts
                    contexts = set(contexts_value.split(b("^")))
                    contexts.add(b(""))  # and from the conjunctive index
                    for c in contexts:
                        for i, _to_key, _ in self.__indices_info:
                            i.remove(_to_key((s, p, o), c))
                else:
                    self.__remove((s, p, o), c)
                needs_sync = True
            if context is not None:
                if subject is None and predicate is None and object is None:
                    # TODO: also if context becomes empty and not just on
                    # remove((None, None, None), c)
                    try:
                        self.__contexts.remove(bb(_to_string(context)))
                    # except db.DBNotFoundError, e:
                    #     pass
                    except Exception as e:  # pragma: NO COVER
                        print("%s, Failed to delete %s" % (
                            e, context))  # pragma: NO COVER
                        pass  # pragma: NO COVER

            self.__needs_sync = needs_sync

    def test_turtle_namespace_prefixes(self):

        g = ConjunctiveGraph()
        n3 = \
        """
        @prefix _9: <http://data.linkedmdb.org/resource/movie/> .
        @prefix p_9: <urn:test:> .
        @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .

        p_9:a p_9:b p_9:c . 

        <http://data.linkedmdb.org/resource/director/1> a
        <http://data.linkedmdb.org/resource/movie/director>;
            rdfs:label "Cecil B. DeMille (Director)";
            _9:director_name "Cecil B. DeMille" ."""

   
        g.parse(data=n3, format='n3')
        turtle = g.serialize(format="turtle")
   
        # Check round-tripping, just for kicks.
        g = ConjunctiveGraph()
        g.parse(data=turtle, format='turtle')
        # Shouldn't have got to here
        s=g.serialize(format="turtle")
        
        self.assert_(b('@prefix _9') not in s)

def unquote(s):
    """Unquote an N-Triples string."""
    if not validate:
        return s.decode('unicode-escape')
    else:
        result = []
        while s:
            m = r_safe.match(s)
            if m:
                s = s[m.end():]
                result.append(m.group(1).decode('ascii'))
                continue

            m = r_quot.match(s)
            if m:
                s = s[2:]
                result.append(quot[m.group(1)])
                continue

            m = r_uniquot.match(s)
            if m:
                s = s[m.end():]
                u, U = m.groups()
                codepoint = int(u or U, 16)
                if codepoint > 0x10FFFF:
                    raise ParseError("Disallowed codepoint: %08X" % codepoint)
                result.append(unichr(codepoint))
            elif s.startswith(b('\\')):
                raise ParseError("Illegal escape at: %s..." % s[:10])
            else: raise ParseError("Illegal literal character: %r" % s[0])
        return u''.join(result)

def test_issue_130():
    g = rdflib.Graph()
    try:
        g.parse(location="http://linked-data.ru/example")
    except:
        raise SkipTest('Test data URL unparseable')
    assert b('rdf:about="http://semanticfuture.net/linked-data/example/#company"') in g.serialize(), g.serialize()

 def test_nonvalidating_unquote(self):
     safe = b(
         """<http://example.org/alice/foaf.rdf#me> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://xmlns.com/foaf/0.1/Person> <http://example.org/alice/foaf1.rdf> ."""
     )
     ntriples.validate = False
     res = ntriples.unquote(safe)
     self.assert_(isinstance(res, unicode))

 def uriref(self):
     if self.peek(b('<')):
         uri = self.eat(r_uriref).group(1)
         uri = unquote(uri)
         uri = uriquote(uri)
         return URI(uri)
     return False

 def test_validating_unquote(self):
     quot = b("""<http://example.org/alice/foaf.rdf#me> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://xmlns.com/foaf/0.1/Person> <http://example.org/alice/foaf1.rdf> .""")
     ntriples.validate = True
     res = ntriples.unquote(quot)
     # revert to default
     ntriples.validate = False
     log.debug("restype %s" % type(res))

    def __len__(self, context=None):
        assert self.__open, "The Store must be open."
        if context is not None:
            if context == self:
                context = None

        if context is None:
            prefix = b("^")
        else:
            prefix = bb("%s^" % self._to_string(context))

        index = self.__indicies[0]
        cursor = index.cursor()
        current = cursor.set_range(prefix)
        count = 0
        while current:
            key, value = current
            if key.startswith(prefix):
                count += 1
                # Hack to stop 2to3 converting this to next(cursor)
                current = getattr(cursor, 'next')()
            else:
                break
        cursor.close()
        return count

    def contexts(self, triple=None):
        _from_string = self._from_string
        _to_string = self._to_string

        if triple:
            s, p, o = triple
            s = _to_string(s)
            p = _to_string(p)
            o = _to_string(o)
            contexts = self.__indicies[0].get(bb(
                "%s^%s^%s^%s^" % ("", s, p, o)))
            if contexts:
                for c in contexts.split(b("^")):
                    if c:
                        yield _from_string(c)
        else:
            index = self.__contexts
            cursor = index.cursor()
            current = cursor.first()
            cursor.close()
            while current:
                key, value = current
                context = _from_string(key)
                yield context
                cursor = index.cursor()
                try:
                    cursor.set_range(key)
                    # Hack to stop 2to3 converting this to next(cursor)
                    current = getattr(cursor, 'next')()
                except db.DBNotFoundError:
                    current = None
                cursor.close()

 def from_key(key):
     "Takes a key; returns string"
     parts = key.split(b("^"))
     return \
         parts[0], \
         parts[(3 - i + 0) % 3 + 1], \
         parts[(3 - i + 1) % 3 + 1], \
         parts[(3 - i + 2) % 3 + 1]