Graph rendering in python flowchart visualization

Question

To Visualize a succession of nodes associated with edges encoded in python.

Searching for a python library to visualize such chart information.

Either a library written in python or python ties is alright

Answer 1

According to me, Graphviz will be the best option.

Graphviz is the premiere graph rendering/layout library; it's mature, stable, open-source, and free of charge. It is not a dedicated flowchart or diagramming package, but its core use case--i.e., efficient and aesthetic rendering of objects comprised of nodes and edges, obviously subsumes flowchart drawing--particularly because its api allows the user to set various constraints on the layout to encourage rendering in the various formats--eg, you can require all nodes of the same level (same number of parents from the root) to be rendered in a single center-aligned row.

Graphviz is not a python library (it's written in C); however there are high quality python bindings available.

The python-Graphviz library I am most familar with is pygraphviz, which is excellent.

Look at the below code, which is used to create a small "flowchart".

digraph {

  node [    fill=cornflowerblue,

            fontcolor=white,

            shape=diamond,

            style=filled];

  Step1 [   color=darkgoldenrod2,

            fontcolor=navy,

            label=start,

            shape=box];

  Step2;

  Step3a [  style=filled,

            fillcolor=grey80,

            color=grey80,

            shape=circle,

            fontcolor=navy];

  Step1  -> Step2;

  Step1  -> Step2a;

  Step2a -> Step3a;

  Step3;

  Step3a -> Step3;

  Step3a -> Step2b;

  Step2  -> Step2b;

  Step2b -> Step3;

  End [ shape=rectangle,

        color=darkgoldenrod2,

        fontcolor=navy];

  Step3  -> End [label=193];

}

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