pymongo cheetsheet

Bult Write

import pymongo
from pymongo import UpdateOne

collection = client[mongo_db][mongo_collection]
opearations = [
    UpdateOne(
        dict(myid=d['myid']),
        {"$set": d},
        upsert=True
    ) for d in document_list
]
cur = collection.bulk_write(operations)
if cur.acknowledge:
    print("succeeded")

Delete Many

import pymongo
from pymongo import UpdateOne

collection = client[mongo_db][mongo_collection]
filter = {}
ret = collection.delete_many(filter)

How to use find with projection

import pymongo
client = pymongo.MongoClient(mongo_uri)
collection = client[mongo_db][mongo_collection]

cur = collection.find(
    filter=filter,
    projection=dict(_id=False, __v=False),
    skip=0,
    limit=10
)
results = [c for c in cur]

How to get collection names and counts of documents

cls = [
    dict(
        name=name,
        count_docs=db[name].count_documents({})
    ) for name in db.list_collection_names()
]