I am using pygraphviz to draw a networkx graph. Unfortunately, the node and edge labels are displayed as boxes. I am drawing the graph as follows:
G.graph['edge'] = {'arrowsize': '0.6', 'splines': 'curved'}
G.graph['graph'] = {'scale': '3'}
for a, b, data in G.edges(data=True):
data['label'] = str(data['edge_info'])
for _, data in G.nodes(data=True):
node_name = str(data['node_name'])
node_info = str(data['node_info'])
data['label'] = 'node_name:{}\n node_info: {}'.format(node_name, node_info)
A = to_agraph(G)
A.layout('dot')
file_name = file_name + '.' + file_format
A.draw(path.join(out_folder, file_name), format=file_format)
The code gets executed in a Docker Container running Debian. The dockerfile looks as follows:
FROM abc/broker-docker:1.3.3
# These should be build-deps and could be uninstalled after pip3 install
RUN apk add --no-cache g++ python3-dev graphviz-dev
RUN pip3 install --upgrade \
setuptools \
wheel
WORKDIR /opt/graph_drawer
ENV PYTHONPATH $PYTHONPATH:/opt/graph_drawer
COPY broker_base ./broker_base
COPY elasticsearch_client ./elasticsearch_client
COPY graph_drawer/* ./
RUN pip3 install -r elasticsearch_client/requirements.txt \
&& pip3 install -r requirements.txt
CMD ["python3", "-u", "graph_drawer.py", "./config.json"]
The following graph gets drawn:
This is clearly not the intended result, but I do not know what I have done wrong... maybe someone of you knows it, any help appreciated!
I managed to reproduce your error.
Seems like you have problem with fonts that are not installed on Docker Alpine/Debian image.
You can install
ttf-freefont
with apk add :Before :
After :