Question

我需要帮助了解异步调用。我有一个javascript函数，我需要在返回true或false之前等待。

代码

In [35]: X = np.random.random([100, 5])

In [36]: y = X.sum(axis=1) + np.random.random(100)

In [37]: dt = DecisionTreeRegressor(max_depth=2)

In [38]: dt.fit(X, y)
Out[38]:
DecisionTreeRegressor(criterion='mse', max_depth=2, max_features=None,
           max_leaf_nodes=None, min_samples_leaf=1, min_samples_split=2,
           min_weight_fraction_leaf=0.0, presort=False, random_state=None,
           splitter='best')

In [39]: dt.apply(X)
Out[39]:
array([6, 3, 3, 3, 6, 6, 3, 6, 3, 6, 2, 3, 3, 5, 3, 5, 5, 6, 3, 3, 3, 3, 3,
       3, 3, 6, 6, 3, 3, 3, 3, 5, 3, 5, 3, 3, 3, 3, 2, 3, 3, 3, 6, 3, 3, 3,
       3, 6, 3, 5, 2, 3, 3, 6, 3, 3, 3, 3, 3, 6, 6, 3, 6, 6, 3, 5, 6, 3, 3,
       3, 3, 6, 3, 3, 2, 3, 6, 2, 6, 2, 3, 3, 6, 2, 5, 6, 3, 3, 3, 6, 5, 3,
       3, 3, 6, 6, 3, 3, 6, 5])

In [40]: export_graphviz(dt)

In [41]: !cat tree.dot
digraph Tree {
node [shape=box] ;
0 [label="X[2] <= 0.7003\nmse = 0.4442\nsamples = 100\nvalue = 3.0586"] ;
1 [label="X[4] <= 0.1842\nmse = 0.3332\nsamples = 65\nvalue = 2.8321"] ;
0 -> 1 [labeldistance=2.5, labelangle=45, headlabel="True"] ;
2 [label="mse = 0.0426\nsamples = 7\nvalue = 1.9334"] ;
1 -> 2 ;
3 [label="mse = 0.2591\nsamples = 58\nvalue = 2.9406"] ;
1 -> 3 ;
4 [label="X[0] <= 0.3576\nmse = 0.3782\nsamples = 35\nvalue = 3.4791"] ;
0 -> 4 [labeldistance=2.5, labelangle=-45, headlabel="False"] ;
5 [label="mse = 0.1212\nsamples = 10\nvalue = 2.9395"] ;
4 -> 5 ;
6 [label="mse = 0.3179\nsamples = 25\nvalue = 3.695"] ;
4 -> 6 ;
}

当我调用此函数时，它将返回asAP未定义的featureStatus值。在这种情况下我应该使用承诺吗？

美好的一天。

模块导出功能，返回前如何等待值？

0 个答案: