graphit.graph_query package¶
graphit.graph_query.graph_query module¶
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class
graphit.graph_query.graph_query.GraphQuery(sep='.')¶ Bases:
objectGraph query engine
Query mini language:
- . = positional argument as either:
key = search at rootlevel .key = search at current node ..key = search at any level
- {} = node or edge argument based search:
‘type’: seach in ‘node’ or ‘edge’ ‘attr’: attribute name to match
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query(graph, querystring, nid=None)¶
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query_edges(graph, pos='R', attr='key', key=None, **kwargs)¶
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query_nodes(nid, pos='R', attr='key', key=None, **kwargs)¶
graphit.graph_query.query_xpath module¶
file: query_xpath.py
XPath based query of Axis based graphs.
-
class
graphit.graph_query.query_xpath.XpathExpressionEvaluator(sep='/')¶ Bases:
object-
static
parse_attr(attr)¶ Parse XPath attribute definitions
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parse_xpath_expression(expression)¶
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resolve(expression, graph)¶ Resolve XPath expression
Always returns a graph that can be empty if the XPath evaluation failed.
- Parameters
expression (:py:str) – XPath expression to evaluate
graph (:graphit:GraphAxis) – GraphAxis instance to apply XPath evaluation on
- Returns
Graph nodes or attributes
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static
