from pymongo import MongoClient
import certifi

ca = certifi.where()
client = MongoClient('mongodb+srv://test:sparta@cluster0.1qvftgf.mongodb.net/Cluster0?retryWrites=true&w=majority', tlsCAFile=ca)
db = client.dbsparta

user = db.users.find_one({'name':'bobby'})
print(user['age'])

# all_users = list(db.users.find({},{'_id':False}))
#
# for user in all_users:
#     print(user)

# doc = {'name':'bobbby','age':27}
# db.users.insert_one(doc)

# db.users.insert_one({'name':'bobbby','age':27})
# db.users.insert_one({'name':'john','age':20})
# db.users.insert_one({'name':'ann','age':25})

<<오류결과>>
Traceback (most recent call last):
  File "/Users/jayden/Desktop/Sparta/pythonprac/dbprac.py", line 9, in <module>
    print(user['age'])
TypeError: 'NoneType' object is not subscriptable


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