如何删除PyMongo中的N个文档?

要删除集合中的N个文档,可以执行以下操作

1. A. bulk_write 属于 DeleteOne 集合上的操作。 e、 g。

   In [1]: from pymongo import MongoClient
           from pymongo.operations import DeleteOne
   
   
           client = MongoClient()
           db = client.test
           N = 2 
   
           result = db.test.bulk_write([DeleteOne({})] * N)
   
   In [2]: print(result.deleted_count)
   2
   

2. A. delete_many 使用前一个ID中所有ID的筛选器 find 。 e、 g。

   def delete_n(collection, n):
       ndoc = collection.find({}, ('_id',), limit=n)
       selector = {'_id': {'$in': [doc['_id'] for doc in ndoc]}}
       return collection.delete_many(selector)
   
   result = delete_n(db.test, 2)
   print(result.deleted_count)