如何使用 re.sub 删除方括号内的重复文本块？

Question

我收到了来自 API 的回复，它是一个伪字典，带有一些'key':'values'但大部分只是带有'key:values'的文本块。 我用.json()将其转换为：

{'status': 'done', 'nextLogId': 'AQAAAXb', 'logs': [{'content': {'service': 't2pipeline', 'tags': ['tag1:value1', 'tag2:value2', 'tag3:value3'], 'timestamp': '2021-01-05T05:25:03.416Z', 'host': 'i-00e17', 'attributes': {'caller': 'psignal/state_machine.go:451', 'ts': 1609824303.416246, 'level': 'warn'}, 'message': 'psignal: Ignoring scte35 segmentation_descriptor (type:Program Start eventID:0 refUTC:Jan 5 05:25:02.387626333): there is an active segment with the same event_id'}, 'id': 'AQAAAXb'}, {'content': {'service': 't2pipeline', 'tags': ['tag1:value1', 'tag2:value2', 'tag3:value3'], 'timestamp': '2021-01-05T05:25:03.416Z', 'host': 'i-00e17', 'attributes': {'caller': 'psignal/state_machine.go:713', 't2': {'scte35': {'event_id': 0, 'event_ptr': '0xc009f32b40', 'seg_type_id': 16}}, 'ts': 1609824303.4161847, 'level': 'info'}, 'message': 'psignal: scte35 segdesc eventID:0 type:Program Start'}, 'id': 'AQAAAXb'}], 'requestId': 'OVZRd3hv'}

这里有两个条目，实际上还会有更多。

我使用json.dumps()转换为字符串

然后使用re.sub()从响应中删除'tags': [] , 部分并像这样返回字符串

res = re.sub(r'"tags": \[.*"\],\s', "", response_string)

问题是它只返回最后一个条目。

print(res)

{"status": "done", "nextLogId": "AQAAAXb", "logs": [{"content": {"service": "t2pipeline", "timestamp": "2021-01-05T05:25:03.416Z", "host": "i-00e17b8e872ec7d05", "attributes": {"caller": "psignal/state_machine.go:713", "t2": {"scte35": {"event_id": 0, "event_ptr": "0xc009f32b40", "seg_type_id": 16}}, "ts": 1609824303.4161847, "level": "info"}, "message": "psignal: scte35 segdesc eventID:0 type:Program Start"}, "id": "AQAAAXb"}], "requestId": "OVZRd3hv"}

如何修改正则表达式，以便删除'tags': []每个实例并返回包含所有条目的整个字符串？

注意：由于我不能按键del ，我认为删除内容的唯一方法是将响应视为字符串并使用正则表达式删除标签。

Answer 1

无需使用正则表达式。 利用

import json
res = {'status': 'done', 'nextLogId': 'AQAAAXb', 'logs': [{'content': {'service': 't2pipeline', 'tags': ['tag1:value1', 'tag2:value2', 'tag3:value3'], 'timestamp': '2021-01-05T05:25:03.416Z', 'host': 'i-00e17', 'attributes': {'caller': 'psignal/state_machine.go:451', 'ts': 1609824303.416246, 'level': 'warn'}, 'message': 'psignal: Ignoring scte35 segmentation_descriptor (type:Program Start eventID:0 refUTC:Jan  5 05:25:02.387626333): there is an active segment with the same event_id'}, 'id': 'AQAAAXb'}, {'content': {'service': 't2pipeline', 'tags': ['tag1:value1', 'tag2:value2', 'tag3:value3'], 'timestamp': '2021-01-05T05:25:03.416Z', 'host': 'i-00e17', 'attributes': {'caller': 'psignal/state_machine.go:713', 't2': {'scte35': {'event_id': 0, 'event_ptr': '0xc009f32b40', 'seg_type_id': 16}}, 'ts': 1609824303.4161847, 'level': 'info'}, 'message': 'psignal: scte35 segdesc eventID:0 type:Program Start'}, 'id': 'AQAAAXb'}], 'requestId': 'OVZRd3hv'}
for i in range(len(res['logs'])):
    del res['logs'][i]['content']['tags']
print(res)

见Python 证明

结果：

{'status': 'done', 'nextLogId': 'AQAAAXb', 'logs': [{'content': {'service': 't2pipeline', 'timestamp': '2021-01-05T05:25:03.416Z', 'host': 'i-00e17', 'attributes': {'caller': 'psignal/state_machine.go:451', 'ts': 1609824303.416246, 'level': 'warn'}, 'message': 'psignal: Ignoring scte35 segmentation_descriptor (type:Program Start eventID:0 refUTC:Jan  5 05:25:02.387626333): there is an active segment with the same event_id'}, 'id': 'AQAAAXb'}, {'content': {'service': 't2pipeline', 'timestamp': '2021-01-05T05:25:03.416Z', 'host': 'i-00e17', 'attributes': {'caller': 'psignal/state_machine.go:713', 't2': {'scte35': {'event_id': 0, 'event_ptr': '0xc009f32b40', 'seg_type_id': 16}}, 'ts': 1609824303.4161847, 'level': 'info'}, 'message': 'psignal: scte35 segdesc eventID:0 type:Program Start'}, 'id': 'AQAAAXb'}], 'requestId': 'OVZRd3hv'}