来源：https://pymongo.readthedocs.io/en/stable/api/pymongo/asynchronous/collection.html

0. 更新文档的 options

• $inc 数字增加 db.test.update_one({'x': 1}, {'$inc': {'x': 3}})

• $set 设置指定的 field db.test.update_one({'x': 1}, {'$set': {'y': 3}})

• $push adds elements to the end of an array if the array exists and creates a new array if it does not

• $ne You might want to treat an array as a set, only adding values if they are not present. This can be done using "$ne" in the query document. This can also be done with "$addToSet", which is useful for cases where "$ne" won’t work or where "$addToSet" describes what is happening better.

1. 更新一个文档

函数： - update_one

async update_one(filter, update, upsert=False, bypass_document_validation=False, collation=None, array_filters=None, hint=None, session=None, let=None, comment=None)

• update_many

async update_many(filter, update, upsert=False, array_filters=None, bypass_document_validation=None, collation=None, hint=None, session=None, let=None, comment=None)

使用方式

result = await db.test.update_one({'x': 1}, {'$inc': {'x': 3}})

或者

result = db.test.update_one({'x': 1}, {'$inc': {'x': 3}})