sparqlstore.py 文件源码

def _traverse_sparql_result_dom(
        doc, as_dictionary=False, node_from_result=_node_from_result):
    """
    Returns a generator over tuples of results
    """
    # namespace handling in elementtree xpath sub-set is not pretty :(
    vars_ = [
        Variable(v.attrib["name"])
        for v in doc.findall(
            './{http://www.w3.org/2005/sparql-results#}head/'
            '{http://www.w3.org/2005/sparql-results#}variable'
        )
    ]
    for result in doc.findall(
            './{http://www.w3.org/2005/sparql-results#}results/'
            '{http://www.w3.org/2005/sparql-results#}result'):
        curr_bind = {}
        values = []
        for binding in result.findall(
                '{http://www.w3.org/2005/sparql-results#}binding'):
            var_val = binding.attrib["name"]
            var = Variable(var_val)
            term = node_from_result(binding.findall('*')[0])
            values.append(term)
            curr_bind[var] = term
        if as_dictionary:
            yield curr_bind, vars_
        else:
            def __locproc(values_):
                if len(values_) == 1:
                    return values_[0]
                else:
                    return tuple(values_)
            yield __locproc(values), vars_