dev(hansbug): fix problem mentioned in #75

examples/README.md

+# Examples of TreeValue
+
+## Examples
+
+Here are some TreeValue examples that can be viewed on Colab.
+
+* Visualization: [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/opendilab/treevalue/blob/main/examples/visualization.ipynb)
+
+## Makefile
+
+```shell
+make clean # clean all output in notebook files
+
+```
+
+**Please make sure the output of all notebook files are cleared with `make clean` before committing**.

examples/basic_usage.ipynb → examples/visualization.ipynb

@@ -5,7 +5,7 @@
    "id": "edb6ed95",
    "metadata": {},
    "source": [
-    "# Basic Usage of TreeValue"
+    "# Visualization of TreeValue"
    ]
   },
   {
@@ -16,6 +16,17 @@
     "Create a simple `FastTreeValue` object."
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "outputs": [],
+   "source": [
+    "!pip install treevalue"
+   ],
+   "metadata": {
+    "collapsed": false
+   }
+  },
   {
    "cell_type": "code",
    "execution_count": null,

test/tree/general/base.py

@@ -646,7 +646,7 @@ def get_fasttreevalue_test(treevalue_class: Type[FastTreeValue]):
                 title="This is a demo of 2 trees with dup value.",
                 cfg={'bgcolor': '#ffffffff'},
             )
-            assert len(graph_1.source) <= 5000
+            assert len(graph_1.source) <= 5000  # a value for svg in windows
 
             graph_2 = treevalue_class.graphics(
                 (t, 't'), (t1, 't1'),