[英]SQL Python how to extend float array
嗨,我得到了一个代码,它正在寻找我的 SQL output 的 id 并尝试像这样将具有相同 id 的措施的结果合并在一起
result = session.execute(stmt, stmt_args)
result2 = session.execute(stmt, stmt_args)
result3 = result2.fetchall()
for request_ts, identifier, ts, array_id, index, measures in result3:
vals = vals_dict.get(array_id)
if vals is None:
# add record to index
values = vals_dict[array_id] = {
'id': array_id,
'request_ts': request_ts,
'identifier': identifier,
'ts': ts,
'value': measures,
}
# adds the same record to the relust list
arrayvals.append(values)
else:
# # look up the record in the index
vals['value'].extend(values)
所以我的问题是我的措施是浮动的。 所以我收到错误消息AttributeError: 'float' object has no attribute 'extend'
My Output without the else (extend) 是:
{
"result_array": [
{
"id": 1,
"identifier": "PortionMotor01",
"request_ts": "Mon, 22 Feb 2021 12:12:27 GMT",
"ts": "Wed, 17 Feb 2021 12:12:00 GMT",
"value": 17.1
},
{
"id": 2,
"identifier": "PortionMotor01",
"request_ts": "Mon, 22 Feb 2021 12:12:27 GMT",
"ts": "Wed, 17 Feb 2021 12:14:00 GMT",
"value": 2005.0
}
]
}
但是结果中每个 id 只有 1 个度量值。 我要这个:
{
"result_array": [
{
"id": 1,
"identifier": "PortionMotor01",
"request_ts": "Mon, 22 Feb 2021 12:12:27 GMT",
"ts": "Wed, 17 Feb 2021 12:12:00 GMT",
"value": [17.1, 18.0, ...]
},
{
"id": 2,
"identifier": "PortionMotor01",
"request_ts": "Mon, 22 Feb 2021 12:12:27 GMT",
"ts": "Wed, 17 Feb 2021 12:14:00 GMT",
"value": [2005.0, 123.5, ...]
}
]
}
我唯一的问题是扩展...有人可以帮助我吗?
当vals
为None
时,将'value'
的值设为包含度量的列表,更改
'value': measures,
至
'value': [measures],
现在您将拥有一个包含一个浮点值的列表。 然后在else
append 中对列表的度量(而不是扩展),即更改:
vals['value'].extend(values)
至
vals['value'].append(measure)
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.