[英]how to drop data in mongo db using python
在我的mongodb中,我有大约2万条记录,现在从同一mongodb中,我仅以python导入500条记录,现在我需要删除已导入的那500条记录,是否可以使用python删除那500条记录?
我的导入500条记录的代码
from pymongo import MongoClient
con = MongoClient(local host, 27017)
db = con.rssfeeds_db
data = pd.DataFrame(list(db.restdata.find().limit(500)))
您需要为每个记录使用_id,以便您可以告诉pymongo删除哪些记录。 例如:
from pymongo import MongoClient
con = MongoClient(localhost, 27017)
db = con.rssfeeds_db
// create a list of the records. each one will be a dict.
records = [x for x in db.restdata.find().limit(500)]
// create a list of the 500 ids so we only need to call the db once
record_ids = [record['_id'] for record in records]
//create your dataframe
data = pd.DataFrame(records)
// delete all 500 records at once
db.restdata.delete_many(
{'_id':
{'$in': record_ids}
},
)
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