gnu: Add python-clingraph.

* gnu/packages/potassco.scm (python-clingraph): New variable.

gnu/packages/potassco.scm

@@ -31,6 +31,7 @@ (define-module (gnu packages potassco)
   #:use-module (guix build-system python)
   #:use-module (guix build-system pyproject)
   #:use-module (gnu packages check)
+  #:use-module (gnu packages graphviz)
   #:use-module (gnu packages libffi)
   #:use-module (gnu packages pkg-config)
   #:use-module (gnu packages python)
@@ -343,3 +344,33 @@ (define-public python-telingo
     (description "This package provides a system to solve dynamic temporal
 logic programs based on clingo.")
     (license license:expat)))
+
+(define-public python-clingraph
+  (package
+    (name "python-clingraph")
+    (version "1.1.0")
+    (source (origin
+              (method git-fetch)
+              (uri (git-reference
+                    (url "https://github.com/potassco/clingraph")
+                    (commit (string-append "v" version))))
+              (file-name (git-file-name name version))
+              (sha256
+               (base32
+                "0bdhli20nw9qnyxmpisgz7m97d7bwx6lbmxy9bgqvm6mipprnv3n"))))
+    (build-system pyproject-build-system)
+    (inputs (list dot2tex graphviz))
+    (propagated-inputs (list python-clingo
+                             python-clorm
+                             python-graphviz
+                             python-imageio
+                             python-jinja2
+                             python-jsonschema
+                             python-networkx))
+    (native-inputs (list dot2tex graphviz python-pylint python-pytest))
+    (home-page "https://github.com/potassco/clingraph")
+    (synopsis "Visualizer for graphs defined as logic programs")
+    (description
+     "This package provides a clingo-based visualizer for graphs defined
+as logic programs.")
+    (license license:expat)))