def dot(graph, simple=True, debug=False, landscape=False):
"""Format graph as a dot file."""
import sys
from rdflib import ConjunctiveGraph
from rdflib.plugin import register, Parser
from rdflib.tools.rdf2dot import rdf2dot
register('json-ld', Parser, 'rdflib_jsonld.parser', 'JsonLDParser')
g = ConjunctiveGraph().parse(
data=_jsonld(graph, 'expand'),
format='json-ld',
)
g.bind('prov', 'http://www.w3.org/ns/prov#')
g.bind('foaf', 'http://xmlns.com/foaf/0.1/')
g.bind('wfdesc', 'http://purl.org/wf4ever/wfdesc#')
g.bind('wf', 'http://www.w3.org/2005/01/wf/flow#')
g.bind('wfprov', 'http://purl.org/wf4ever/wfprov#')
g.bind('schema', 'http://schema.org/')
if debug:
rdf2dot(g, sys.stdout)
return
sys.stdout.write('digraph { \n node [ fontname="DejaVu Sans" ] ; \n ')
if landscape:
sys.stdout.write('rankdir="LR" \n')
if simple:
_rdf2dot_simple(g, sys.stdout)
return
_rdf2dot_reduced(g, sys.stdout)
def visualize(g, ofname):
stream = io.StringIO()
rdf2dot(g, stream, opts={display})
dg = pydotplus.graph_from_dot_data(stream.getvalue())
png = dg.create_png()
img = Image(data=png) # generate .png object.
open(outputDir + '/' + ofname + '.png', 'wb').write(img.data)
def write_image(self, display=False):
"""" to do """
with open("%s.dot" % str(self.graph), 'w') as f:
rdf2dot(Graph(self.graph), f)
if display == "True":
Source.main(f)
def dot(graph, simple=True, debug=False, landscape=False, strict=False):
"""Format graph as a dot file."""
import sys
from rdflib.tools.rdf2dot import rdf2dot
if strict:
raise SHACLValidationError('--strict not supported for json-ld-graph')
g = _conjunctive_graph(graph)
g.bind('prov', 'http://www.w3.org/ns/prov#')
g.bind('foaf', 'http://xmlns.com/foaf/0.1/')
g.bind('wfdesc', 'http://purl.org/wf4ever/wfdesc#')
g.bind('wf', 'http://www.w3.org/2005/01/wf/flow#')
g.bind('wfprov', 'http://purl.org/wf4ever/wfprov#')
g.bind('schema', 'http://schema.org/')
if debug:
rdf2dot(g, sys.stdout)
return
sys.stdout.write('digraph { \n node [ fontname="DejaVu Sans" ] ; \n ')
if landscape:
sys.stdout.write('rankdir="LR" \n')
if simple:
_rdf2dot_simple(g, sys.stdout)
return
_rdf2dot_reduced(g, sys.stdout)
def describe(events, format='text'):
if format == 'text':
for event in events:
attime = event.get_at_time()
beginning = attime.get_beginning()
end = attime.get_end()
place = event.get_at_place()
print(
'A {} event occurred at {} ({}) [{}] on {} starting at {} and ending at {}.'
.format(event.get_classification().label, place.get_name(),
place.get_country_code(), place.get_location_map(),
beginning.get_datetime().strftime('%Y-%m-%d'),
beginning.get_datetime().strftime('%H:%M'),
end.get_datetime().strftime('%H:%M')))
return
if format == 'rdf':
g = Graph()
g.bind('wgs84', WGS84.ns)
g.bind('lode', LODE.ns)
g.bind('time', Time.ns)
g.bind('geosparql', GeoSPARQL.ns)
g.bind('gn', GeoNames.ns)
g.bind('sf', SimpleFeatures.ns)
g.bind('DUL', DUL.ns)
g.bind('smear', SmartSMEAR.ns)
for event in events:
for s, p, o in event.graph():
g.add((s, p, o))
print(g.serialize(format='turtle', indent=4).decode('utf-8'))
return
if format == 'graph':
rdflib_graph = Graph()
rdflib_graph.bind('wgs84', WGS84.ns)
rdflib_graph.bind('lode', LODE.ns)
rdflib_graph.bind('time', Time.ns)
rdflib_graph.bind('geosparql', GeoSPARQL.ns)
rdflib_graph.bind('gn', GeoNames.ns)
rdflib_graph.bind('sf', SimpleFeatures.ns)
rdflib_graph.bind('DUL', DUL.ns)
rdflib_graph.bind('smear', SmartSMEAR.ns)
for event in events:
for s, p, o in event.graph():
rdflib_graph.add((s, p, o))
stream = io.StringIO()
rdf2dot(rdflib_graph, stream)
(pydot_graph, ) = pydot.graph_from_dot_data(stream.getvalue())
display(SVG(pydot_graph.create_svg()))
return
raise ValueError('Unsupported format: {}'.format(format))
def graph():
out = StringIO()
uri = request.args.get('uri')
g = Graph()
g.parse(data=json.dumps(es.get(index='bbc', doc_type='item', id=uri)['_source']['jsonld']), format='json-ld')
rdf2dot(g, out)
dot_graph = graph_from_dot_data(out.getvalue())
return dot_graph.create(format='png'), 200, {'Content-Type': 'image/png'}
def renderGraph(g):
"""
For rendering an rdflib graph in Jupyter notebooks
Args:
g: Graph or ConjunctiveGraph
Returns:
Output for rendering directly in the notebook
"""
fp = io.StringIO()
rdf2dot.rdf2dot(g, fp)
return graphviz.Source(fp.getvalue())
def render_graph_dot(g):
import tempfile
from subprocess import call
from os import fork
from sys import exit
from rdflib.tools.rdf2dot import rdf2dot
with tempfile.TemporaryFile() as f:
rdf2dot(g, f)
f.seek(0, 0) # start of stream
g,gname = tempfile.mkstemp()
call("dot -T png -o "+gname, stdin = f, shell=True)
call("feh "+gname, shell = True)
def graph():
out = StringIO()
uri = request.args.get('uri')
g = Graph()
g.parse(data=json.dumps(
es.get(index='bbc', doc_type='item', id=uri)['_source']['jsonld']),
format='json-ld')
rdf2dot(g, out)
dot_graph = graph_from_dot_data(out.getvalue())
return dot_graph.create(format='png'), 200, {'Content-Type': 'image/png'}
def dot(graph):
"""Format graph as a dot file."""
import sys
from rdflib import ConjunctiveGraph
from rdflib.plugin import register, Parser
from rdflib.tools.rdf2dot import rdf2dot
register('json-ld', Parser, 'rdflib_jsonld.parser', 'JsonLDParser')
g = ConjunctiveGraph().parse(
data=_jsonld(graph, 'expand'),
format='json-ld',
)
rdf2dot(g, sys.stdout)
def renderGraph(g):
"""
For rendering an rdflib graph in Jupyter notebooks
Args:
g (Graph): The graph to render
Returns:
Jupyter cell: Output for rendering directly in the notebook
Example:
.. jupyter-execute:: examples/code/eg_rendergraph_01.py
"""
fp = io.StringIO()
rdf2dot.rdf2dot(g, fp)
return graphviz.Source(fp.getvalue())
def graph(instance: ConjunctiveGraph) -> str:
"""
Render RDF graph visually as PNG image.
Idea: https://stackoverflow.com/a/61483971/1245471
"""
dot_description = io.StringIO()
with patch('rdflib.tools.rdf2dot.cgi', html):
# FIXME hack, fixes this: https://github.com/RDFLib/rdflib/issues/1110
rdf2dot(instance, dot_description)
dg = pydotplus.graph_from_dot_data(dot_description.getvalue())
png = dg.create_png()
encoded_png = b64encode(png).decode('utf-8')
return f'<img src="data:image/png;base64,{encoded_png}" />'
def make_graphs(rdf_str, fname_base):
try:
rdf_fname = 'sources/cwms/example_rdfs/' + fname_base + '.rdf'
with open(rdf_fname, 'w') as f:
f.write(rdf_str)
g_rdf = rdflib.Graph()
g_rdf.parse(rdf_fname, publicID=fname_base)
dot_fname = 'sources/cwms/example_dots/' + fname_base + '.dot'
with open(dot_fname, 'w') as f:
rdf2dot.rdf2dot(g_rdf, f)
if HAVE_PYDOT:
g_dot = pydot.graph_from_dot_file(dot_fname)[0]
logger.warning("pydot is not available, so pydot graph was not "
"produced. To get pydot, run `pip install pydot`.")
else:
g_dot = None
except Exception as e:
logger.error("Got exeption for rdf string: %s" % rdf_str)
logger.exception(e)
return (None, None)
return (g_rdf, g_dot)
def make_graphs(rdf_str, fname_base):
try:
rdf_fname = 'sources/cwms/example_rdfs/' + fname_base + '.rdf'
with open(rdf_fname, 'w') as f:
f.write(rdf_str)
g_rdf = rdflib.Graph()
g_rdf.parse(rdf_fname, publicID=fname_base)
dot_fname = 'sources/cwms/example_dots/' + fname_base + '.dot'
with open(dot_fname, 'w') as f:
rdf2dot.rdf2dot(g_rdf, f)
if HAVE_PYDOT:
g_dot = pydot.graph_from_dot_file(dot_fname)[0]
logger.warning("pydot is not available, so pydot graph was not "
"produced. To get pydot, run `pip install pydot`.")
else:
g_dot = None
except Exception as e:
logger.error("Got exeption for rdf string: %s" % rdf_str)
logger.exception(e)
return (None, None)
return (g_rdf, g_dot)
def graphrdf(graph, format_):
return dot(lambda uw: rdf2dot.rdf2dot(graph, stream=uw), format_)
def get_rdf_graph(graph, format_):
return dot(lambda uw: rdf2dot.rdf2dot(graph, stream=uw), format_)
def graphrdf(graph, format_):
return dot(lambda uw: rdf2dot.rdf2dot(
graph, stream=uw), format_)
