Add graph demo for python

demo/python/graph.py

@@ -0,0 +1,36 @@
+# Install the python extension for VS Code
+# (https:#marketplace.visualstudio.com/items?itemName=ms-python.python).
+
+# The Debug Visualizer has no support for Python data extractors yet,
+# so to visualize data, your value must be a valid JSON string representing the data.
+# See readme for supported data schemas.
+
+from json import dumps
+from random import randint
+
+graph = {
+    "kind": {"graph": True},
+    "nodes": [
+        {"id": "1", "label": "1"}
+    ],
+    "edges": []
+}
+
+for i in range(2,100):
+    # add a node
+    id = str(i)
+    graph["nodes"].append({"id": id, "label": id})
+    # connects the node to a random edge
+    targetId = str(randint(1, i - 1))
+    graph["edges"].append({"from": id, "to": targetId})
+    json_graph = dumps(graph)
+    print("i is " + str(i))
+    # try setting a breakpoint right above
+    # then put json_graph into the visualization console and press enter
+    # when you step through the code each time you hit the breakpoint
+    # the graph should automatically refresh!
+    
+# example of json_graph visualization with 10 nodes:
+# https://i.imgur.com/RqZuYHH.png
+
+print("finished")