feat(board): python_pyodide下添加对tensorflow的支持 (待完善)

boards/default_src/python_pyodide/others/loader.js

@@ -1,3 +1,6 @@
 import NavExt from './nav-ext';
+import * as tf from '@tensorflow/tfjs';
+import './tensorflow';
 
-NavExt.init();
+NavExt.init();
+window.tf = tf;

boards/default_src/python_pyodide/others/tensorflow.js

@@ -0,0 +1,58 @@
+import { Registry } from 'mixly';
+import * as tf from '@tensorflow/tfjs';
+
+
+const modelsValueRegistry = new Registry();
+const customFetch = function (path) {
+    let result = {
+        ok: false,
+        buffer: null,
+        json: function () {
+            const decoder = new TextDecoder('utf-8');
+            const jsonText = decoder.decode(this.buffer);
+            return JSON.parse(jsonText);
+        },
+        arrayBuffer: function () {
+            return this.buffer;
+        }
+    }
+    if (!modelsValueRegistry.hasKey(path)) {
+        return result;
+    }
+    result.ok = true;
+    result.buffer = modelsValueRegistry.getItem(path);
+    return result;
+};
+
+const tensorflow = {};
+tensorflow.modelsValue = {};
+
+tensorflow.loadGraphModel = async function (path) {
+    const model = await tf.loadGraphModel(path, {
+        fromTFHub: false,
+        fetchFunc: (...args) => {
+            return customFetch(args[0]);
+        }
+    });
+    return model;
+};
+
+tensorflow.loadLayersModel = async function (path) {
+    const model = await tf.loadLayersModel(path, {
+        fromTFHub: false,
+        fetchFunc: (...args) => {
+            return customFetch(args[0]);
+        }
+    });
+    return model;
+};
+
+tensorflow.setModelsValue = function (path, value) {
+    if (modelsValueRegistry.hasKey(path)) {
+        modelsValueRegistry.unregister(path);
+    }
+    modelsValueRegistry.register(path, value);
+    tensorflow.modelsValue[path] = value;
+};
+
+window.tensorflow = tensorflow;