PyGraphviz 将 networkx 图形标签绘制为框

Question

我正在使用 pygraphviz 绘制 networkx 图。不幸的是，节点和边缘标签显示为框。我画的图如下：

        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)

代码在 Docker 容器运行 Debian 中执行。 dockerfile 如下所示：

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"]

绘制了下图：

这显然不是预期的结果，但我不知道我做错了什么......也许你们中有人知道，感谢任何帮助！

Answer 1

我成功重现了你的错误。

您似乎对 Docker Alpine/Debian 图片上未安装的字体有疑问。

您可以安装 ttf-freefont 并添加 apk :

RUN apk add --no-cache ttf-freefont

之前：

之后：

PyGraphviz 将 networkx 图形标签绘制为框

PyGraphviz draws networkx graph labels as boxes

python

graphviz

networkx

pygraphviz

docker