return np.array(self.server_utilization + list(self.remaining_tasks.values())的错误
时间: 2024-03-01 14:55:28 浏览: 47
这个错误是因为在代码中使用了numpy库中的array函数,但是传入的参数不合法。具体来说,self.server_utilization是一个列表,self.remaining_tasks.values()返回的是一个字典视图(view object),无法直接转换为数组。可以尝试将字典视图转换为列表后再进行拼接,例如使用以下代码:
```python
return np.array(self.server_utilization + list(self.remaining_tasks.values()))
```
这样就可以将两个列表拼接为一个数组返回了。
相关问题
psutil.virtual_memory()
psutil.virtual_memory() is a Python function that returns a named tuple representing the system's virtual memory statistics. The tuple contains the following fields:
- total: the total amount of physical memory, in bytes
- available: the amount of physical memory currently available, in bytes
- percent: the percentage of memory that is currently in use
- used: the amount of memory currently being used, in bytes
- free: the amount of memory currently available for use, in bytes
- active: the amount of memory currently being used actively, in bytes
- inactive: the amount of memory that is currently inactive, in bytes
- buffers: the amount of memory currently being used for buffers, in bytes
- cached: the amount of memory currently being used for caching, in bytes
This function is part of the psutil module, which is used to retrieve information about system processes and system utilization.
优化以下SQL语句使该语句可以在MySQL5.0中可以运行:select sum(max(TRUNCATE(cast(t0.disk_space_utilization as decimal(30,8)), 0))) over ( order by max(TRUNCATE(cast(t0.disk_space_utilization as decimal(30,8)), 0)))*1.0/100 as calc from (SELECT a.sync_time, a.equipment_monitor_id, a.equipment_id, a.cpu_load, a.memory_load, a.disk_space, a.disk_space_utilization, a.network_card_throughput, a.control_unit_temperature FROM nec_equipment_monitor_statistics a order by a.sync_time) t0 where (t0.equipment_id='IT-A01-32' AND str_to_date(t0.sync_time,'%Y-%m-%d %H:%i:%s')>=str_to_date('20230519','%Y%m%d') and str_to_date(t0.sync_time,'%Y-%m-%d %H:%i:%s')<str_to_date('20230520','%Y%m%d'))
MySQL 5.0 不支持窗口函数和子查询中的 ORDER BY 子句,因此需要对该 SQL 语句进行重构。我们可以使用 GROUP BY 和 JOIN 来替代窗口函数和子查询中的 ORDER BY 子句。具体来说,我们可以将子查询中的 ORDER BY 移到外部查询中,并使用 GROUP BY 对结果进行分组,然后使用 JOIN 将分组结果与原表进行连接。下面是重构后的 SQL 语句:
```
SELECT SUM(MAX(TRUNCATE(CAST(t.disk_space_utilization AS DECIMAL(30,8)), 0))) * 1.0/100 AS calc
FROM (
SELECT a.equipment_id, MAX(TRUNCATE(CAST(a.disk_space_utilization AS DECIMAL(30,8)), 0)) AS max_utilization
FROM nec_equipment_monitor_statistics a
WHERE a.equipment_id = 'IT-A01-32'
AND STR_TO_DATE(a.sync_time,'%Y-%m-%d %H:%i:%s') BETWEEN '2023-05-19 00:00:00' AND '2023-05-20 00:00:00'
GROUP BY a.equipment_id
) t
JOIN nec_equipment_monitor_statistics s ON t.equipment_id = s.equipment_id AND TRUNCATE(CAST(s.disk_space_utilization AS DECIMAL(30,8)), 0) = t.max_utilization;
```
需要注意的是,由于 MySQL 5.0 不支持 CAST 函数的 DECIMAL 类型参数,因此需要将 DECIMAL(30,8) 修改为 DECIMAL。