Python MongoDB - Limit Query

from pymongo import MongoClient
c = MongoClient("mongodb://localhost:27017/")
db = c['grpDB']
col = db['sales']

data = [
    {"_id": 1, "user": "Amit", "product": "Pen", "amount": 5},
    {"_id": 2, "user": "Drew", "product": "Pencil", "amount": 3},
    {"_id": 3, "user": "Amit", "product": "Notebook", "amount": 15},
    {"_id": 4, "user": "Cody", "product": "Pen", "amount": 7},
    {"_id": 5, "user": "Drew", "product": "Notebook", "amount": 12},
    {"_id": 6, "user": "Cody", "product": "Eraser", "amount": 2},
    {"_id": 7, "user": "Amit", "product": "Pen", "amount": 10}
]

col.delete_many({})
col.insert_many(data)
print("Data inserted.")

#Driver Code Starts
from pymongo import MongoClient
c = MongoClient("mongodb://localhost:27017/")
db = c['grpDB']
col = db['sales']

#Driver Code Ends

res = col.find().limit(3)
for doc in res:

#Driver Code Starts
    print(doc)
#Driver Code Ends

from pymongo import MongoClient
c = MongoClient("mongodb://localhost:27017/")
db = c['grpDB']
col = db['sales']

res = col.find().sort("amount", -1).limit(2)
for doc in res:
    print(doc)

from pymongo import MongoClient
c = MongoClient("mongodb://localhost:27017/")
db = c['grpDB']
col = db['sales']

res = col.find({"user": "Cody"}).limit(1)
for doc in res:
    print(doc)