The Pymongo of MongoDB

Pymongo is what Pymongo is a driver that enables Python programs to be written using a MongoDB database using Python. Installation environment: Ubuntu 14.04+PYTHON2.7+MONGODB 2.4 Go to the official website to download the package, address click Open Link. After decompression, enter, use python setup.py Install  To install or install with PIP pip-m Install PymongoBasic use to create a connection

1. Import Pymongo
2. Client = Pymongo. Mongoclient (' localhost ', 27017)

Or it could be.

1. Import Pymongo
2. Client = mongoclient (' mongodb://localhost:27017/')

Connecting to a database

1. db = Client.mydb

Or

1. db = client[' mydb ')

Connecting clustered aggregates equivalent to tables in relational databases

1. Collection = Db.my_collection

Or

1. Collection = db[' my_collection ']

View all clustered names under the database

1. Db.collection_names ()

Inserting records

1. Collection.insert ({"Key1":"value1","Key2","value2"})

Deleting records

Delete all

1. Collection.remove ()

Delete by condition

1. Collection.remove ({"Key1":"value1"})

Update record

1. Collection.update ({"Key1": "value1"}, {"$set": {"Key2": "value2", "Key3": "Value3"}})

Query records query a record: Find_one () returns the first record without any parameters. Conditional lookup returns with parameters

1. Collection.find_one ()
2. Collection.find_one ({"Key1":"value1"})

Querying multiple records: Find () returns all records without parameters, with parameters returned by conditional lookup

1. Collection.find ()

1. Collection.find ({"Key1":"value1"})

View multiple records in a cluster  

1. For item in Collection.find ():
2. Print Item

View the total number of clustered records

1. Print Collection.find (). Count ()

Sort the query Result sort column

1. Collection.find (). Sort ("Key1") # Default to Ascending
2. Collection.find (). Sort ("Key1", Pymongo. Ascending) # ascending
3. Collection.find (). Sort ("Key1", Pymongo. Descending) # descending

Sort on multiple columns

1. Collection.find (). Sort ([("Key1", Pymongo. Ascending), ("Key2", Pymongo. Descending)])

The Pymongo of MongoDB