Question

我想将数据从JSON文件加载到我的Pyomo模型中。我从

开始

m = AbstractModel()
m.T = RangeSet(1,48,1)
m.TS = Param(m.T)
dp = DataPortal()

稍后我想加载json文件以填充参数TS

dp.load(param = m.TS, filename = data.json)

数据是一个由整数1,2，...，48索引的时间序列从而看起来像这样：

{ 
  "1" : 0.0001,
  "2" : 0.1 ,
  ....,
  "48" : 0
}

然后我创建

create_instance(dp)

我得到以下错误：

RuntimeError: Failed to set value for param=TS, index=1, value=35.676187.
        source error message="Index '1' is not valid for indexed component 'TS'"

Answer 1

因此，我提出了解决此问题的方法。 JSON文件应以以下方式编写：

foreach ($orders as $key => $order) {
    // find number of products in common with other orders
    foreach ($orders as $k2 => $o2) {
        if ($k2 <= $key) continue;
        $common["{$order['order_id']}-{$o2['order_id']}"] = count(array_intersect($order['products'], $o2['products']));
    }
}
arsort($common);
$orders_used = array();
foreach (array_keys($common) as $order_pair) {
    list($order1, $order2) = explode('-', $order_pair);
    // already output these orders?
    if (in_array($order1, $orders_used) || in_array($order2, $orders_used)) continue;
    $orders_used[] = $order1;
    $orders_used[] = $order2;
    // if we've used all the orders, quit
    if (count($orders_used) == count($orders)) break;
}
for ($i = 0; $i < count($orders_used); $i += 4) {
    echo "batch " . ($i / 4 + 1) . ": orders " . implode(',', array_slice($orders_used, $i, 4)) . "\n";
}

通过DataPortal将JSON数据加载到参数中

1 个答案: