ENH(plot): plot with Ortho-edges (graphviz) ...

actually a fix, since splines were on each node.

Author: ankostis

docs/source/arch.rst

@@ -313,7 +313,7 @@ Architecture
     endurance
         Keep executing as many `operation`\s as possible, even if some of them fail.
         Endurance for an operation  is enabled if :func:`.set_endure_operations()`
-        is true globally in the `configurations` or if :attr:`.FunctionalOperation.endurance`
+        is true globally in the `configurations` or if :attr:`.FunctionalOperation.endured`
         is true.
 
         You may interrogate :attr:`.Solution.executed` to discover the status

graphtik/base.py

@@ -251,6 +251,10 @@ def plot(
             an optional nested dict of Graphviz attributes for certain edges
         :param clusters:
             an optional mapping of nodes --> cluster-names, to group them
+        :param splines:
+            Whether to plot `curved/polyline edges
+            <https://graphviz.gitlab.io/_pages/doc/info/attrs.html#d:splines>`_
+            [default: "ortho"]
         :param jupyter_render:
             a nested dictionary controlling the rendering of graph-plots in Jupyter cells,
             if `None`, defaults to :data:`jupyter_render` (you may modify it in place
@@ -341,6 +345,7 @@ def plot(
         digraph netop {
             fontname=italic;
             label=<netop>;
+            splines=ortho;
             <a> [fillcolor=wheat, shape=invhouse, style=filled, tooltip=1];
         ...
 

graphtik/plot.py

@@ -202,6 +202,7 @@ def build_pydot(
     node_props=None,
     edge_props=None,
     clusters=None,
+    splines="ortho",
     legend_url="https://graphtik.readthedocs.io/en/latest/_images/GraphtikLegend.svg",
 ) -> pydot.Dot:
     """
@@ -251,7 +252,10 @@ def get_node_name(a):
         return quote_dot_word(a)
 
     dot = pydot.Dot(
-        graph_type="digraph", label=quote_dot_word(title), fontname="italic"
+        graph_type="digraph",
+        label=quote_dot_word(title),
+        fontname="italic",
+        splines="ortho",
     )
     if name:
         dot.set_name(as_identifier(name))
@@ -337,8 +341,7 @@ def get_node_name(a):
             if solution and dst not in solution and dst not in steps:
                 kw["color"] = broken_color
 
-        # `splines=ortho` not working :-()
-        edge = pydot.Edge(src=src_name, dst=dst_name, splines="ortho", **kw)
+        edge = pydot.Edge(src=src_name, dst=dst_name, **kw)
 
         _apply_user_props(edge, edge_props, key=(src, dst))
 

test/test_plot.py

@@ -239,13 +239,14 @@ def test_node_quoting():
         digraph graph_ {
         fontname=italic;
         label=<graph>;
+        splines=ortho;
         <edge> [shape=invhouse];
         <digraph&#58; strict> [shape=invhouse];
         <node> [fontname=italic, shape=oval, tooltip="FunctionalOperation(name='node', needs=['edge', 'digraph: strict'], provides=['<graph>'], fn='add')"];
         <graph> [shape=house];
-        <edge> -> <node>  [splines=ortho];
-        <digraph&#58; strict> -> <node>  [splines=ortho];
-        <node> -> <graph>  [splines=ortho];
+        <edge> -> <node>;
+        <digraph&#58; strict> -> <node>;
+        <node> -> <graph>;
         legend [URL="https://graphtik.readthedocs.io/en/latest/_images/GraphtikLegend.svg", fill_color=yellow, shape=component, style=filled];
         }
         """