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125 lines
4.0 KiB
Python
125 lines
4.0 KiB
Python
# Copyright 2018-2022 Streamlit Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Streamlit support for GraphViz charts."""
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import hashlib
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from typing import cast
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import streamlit
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from streamlit import type_util
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from streamlit.errors import StreamlitAPIException
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from streamlit.logger import get_logger
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from streamlit.proto.GraphVizChart_pb2 import GraphVizChart as GraphVizChartProto
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LOGGER = get_logger(__name__)
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class GraphvizMixin:
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def graphviz_chart(self, figure_or_dot, use_container_width=False):
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"""Display a graph using the dagre-d3 library.
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Parameters
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----------
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figure_or_dot : graphviz.dot.Graph, graphviz.dot.Digraph, str
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The Graphlib graph object or dot string to display
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use_container_width : bool
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If True, set the chart width to the column width. This takes
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precedence over the figure's native `width` value.
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Example
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-------
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>>> import streamlit as st
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>>> import graphviz as graphviz
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>>>
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>>> # Create a graphlib graph object
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>>> graph = graphviz.Digraph()
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>>> graph.edge('run', 'intr')
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>>> graph.edge('intr', 'runbl')
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>>> graph.edge('runbl', 'run')
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>>> graph.edge('run', 'kernel')
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>>> graph.edge('kernel', 'zombie')
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>>> graph.edge('kernel', 'sleep')
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>>> graph.edge('kernel', 'runmem')
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>>> graph.edge('sleep', 'swap')
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>>> graph.edge('swap', 'runswap')
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>>> graph.edge('runswap', 'new')
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>>> graph.edge('runswap', 'runmem')
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>>> graph.edge('new', 'runmem')
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>>> graph.edge('sleep', 'runmem')
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>>>
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>>> st.graphviz_chart(graph)
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Or you can render the chart from the graph using GraphViz's Dot
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language:
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>>> st.graphviz_chart('''
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digraph {
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run -> intr
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intr -> runbl
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runbl -> run
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run -> kernel
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kernel -> zombie
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kernel -> sleep
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kernel -> runmem
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sleep -> swap
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swap -> runswap
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runswap -> new
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runswap -> runmem
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new -> runmem
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sleep -> runmem
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}
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''')
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.. output::
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https://share.streamlit.io/streamlit/docs/main/python/api-examples-source/charts.graphviz_chart.py
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height: 600px
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"""
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# Generate element ID from delta path
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delta_path = self.dg._get_delta_path_str()
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element_id = hashlib.md5(delta_path.encode()).hexdigest()
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graphviz_chart_proto = GraphVizChartProto()
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marshall(graphviz_chart_proto, figure_or_dot, use_container_width, element_id)
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return self.dg._enqueue("graphviz_chart", graphviz_chart_proto)
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@property
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def dg(self) -> "streamlit.delta_generator.DeltaGenerator":
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"""Get our DeltaGenerator."""
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return cast("streamlit.delta_generator.DeltaGenerator", self)
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def marshall(proto, figure_or_dot, use_container_width, element_id):
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"""Construct a GraphViz chart object.
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See DeltaGenerator.graphviz_chart for docs.
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"""
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if type_util.is_graphviz_chart(figure_or_dot):
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dot = figure_or_dot.source
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elif isinstance(figure_or_dot, str):
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dot = figure_or_dot
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else:
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raise StreamlitAPIException(
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"Unhandled type for graphviz chart: %s" % type(figure_or_dot)
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)
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proto.spec = dot
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proto.use_container_width = use_container_width
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proto.element_id = element_id
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