python -m pip install pymongo
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
print(myclient.list_database_names())
['admin', 'config', 'local']
dblist = myclient.list_database_names()
if "school" in dblist:
print("The database exists.")
mydb = myclient["school"]
for p in dblist:
print(p)
admin
config
local
#Display all the databases.
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
for p in myclient.list_database_names():
print(p)
admin
config
local
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
dblist = myclient.list_database_names()
if "school" in dblist:
print("The database : {} exists.".format("school"))
The database : school exists.
#Display all the collections (tables) in a database:
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["school"]
collist = mydb.list_collection_names()
for collectionName in collist:
print(collectionName)
student
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["school"]
collist = mydb.list_collection_names()
if "student" in collist:
print("Collection student exists in school database")
Collection student exists in school database
#insert a document (Row) in a collection (table)
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["school"]
mycol = mydb["student"]
personDict = { "firstname":"Priya","lastname":"Balakumaran","city":"Kandanur" }
x = mycol.insert_one(personDict)
print(x.inserted_id)
#insert multiple documents - Multi row insert
#autogenerated ids
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["school"]
mycol = mydb["student"]
mydocs = [
{ "firstname":"Ravi","lastname":"Rahul","city":"Pallathur"},
{ "firstname":"Siva","lastname":"Prasad","city":"Vadagudi"},
{ "firstname":"Arun","lastname":"Kumar","city":"Kanadukathan"},
{ "firstname":"Awesome","lastname":"Nator","city":"London"}
]
x = mycol.insert_many(mydocs)
#print list of the _id values of the inserted documents:
print(x.inserted_ids)
#insert multiple document with id specified
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["school"]
mycol = mydb["student"]
mydocs = [
{"_id": 101,"firstname":"Kalai","lastname":"Selvi","city":"Aathalur"},
{"_id": 102,"firstname":"Anna","lastname":"Malai","city":"Singapore"},
{"_id": 103,"firstname":"Vanakkam","lastname":"da mappla","city":"Theni"},
{"_id": 104 ,"firstname":"Anbu","lastname":"Sudha","city":"Bangalore"}
]
x = mycol.insert_many(mydocs)
#print list of the _id values of the inserted documents:
print(x.inserted_ids)
[101, 102, 103, 104]
#Search document in a collection
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["school"]
mycol = mydb["student"]
x = mycol.find_one()
print(x)
{'_id': ObjectId('5eba5eff2a9545fa868c9aa8'), 'firstname': 'Raja', 'lastname': 'Raman', 'city': 'Kottaiyur'}
#find : Selct all : Select * from doc
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["school"]
mycol = mydb["student"]
docs = mycol.find()
for d in docs:
print (d)
{'_id': ObjectId('5eba5eff2a9545fa868c9aa8'), 'firstname': 'Raja', 'lastname': 'Raman', 'city': 'Kottaiyur'}
{'_id': ObjectId('5eba5f522a9545fa868c9aac'), 'firstname': 'Priya', 'lastname': 'Balakumaran', 'city': 'Kandanur'}
{'_id': ObjectId('5eba60012a9545fa868c9aae'), 'firstname': 'Ravi', 'lastname': 'Rahul', 'city': 'Pallathur'}
{'_id': ObjectId('5eba60012a9545fa868c9aaf'), 'firstname': 'Siva', 'lastname': 'Prasad', 'city': 'Vadagudi'}
{'_id': ObjectId('5eba60012a9545fa868c9ab0'), 'firstname': 'Arun', 'lastname': 'Kumar', 'city': 'Kanadukathan'}
{'_id': ObjectId('5eba60012a9545fa868c9ab1'), 'firstname': 'Awesome', 'lastname': 'Nator', 'city': 'London'}
{'_id': 101, 'firstname': 'Kalai', 'lastname': 'Selvi', 'city': 'Aathalur'}
{'_id': 102, 'firstname': 'Anna', 'lastname': 'Malai', 'city': 'Singapore'}
{'_id': 103, 'firstname': 'Vanakkam', 'lastname': 'da mappla', 'city': 'Theni'}
{'_id': 104, 'firstname': 'Anbu', 'lastname': 'Sudha', 'city': 'Bangalore'}
#display specific columns
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["school"]
mycol = mydb["student"]
for x in mycol.find({},{ "_id": 0, "firstname": 1, "lastname": 1, "city":1 }):
print(x)
{'firstname': 'Raja', 'lastname': 'Raman', 'city': 'Kottaiyur'}
{'firstname': 'Priya', 'lastname': 'Balakumaran', 'city': 'Kandanur'}
{'firstname': 'Ravi', 'lastname': 'Rahul', 'city': 'Pallathur'}
{'firstname': 'Siva', 'lastname': 'Prasad', 'city': 'Vadagudi'}
{'firstname': 'Arun', 'lastname': 'Kumar', 'city': 'Kanadukathan'}
{'firstname': 'Awesome', 'lastname': 'Nator', 'city': 'London'}
{'firstname': 'Kalai', 'lastname': 'Selvi', 'city': 'Aathalur'}
{'firstname': 'Anna', 'lastname': 'Malai', 'city': 'Singapore'}
{'firstname': 'Vanakkam', 'lastname': 'da mappla', 'city': 'Theni'}
{'firstname': 'Anbu', 'lastname': 'Sudha', 'city': 'Bangalore'}
#display only the last name:
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["school"]
mycol = mydb["student"]
for x in mycol.find({},{ "_id": 0,"city":0,"firstname":0 }):
print(x)
{'lastname': 'Raman'}
{'lastname': 'Balakumaran'}
{'lastname': 'Rahul'}
{'lastname': 'Prasad'}
{'lastname': 'Kumar'}
{'lastname': 'Nator'}
{'lastname': 'Selvi'}
{'lastname': 'Malai'}
{'lastname': 'da mappla'}
{'lastname': 'Sudha'}
#Except id and City:
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["school"]
mycol = mydb["student"]
for x in mycol.find({},{ "_id":0,"city":0 }):
print(x)
{'firstname': 'Raja', 'lastname': 'Raman'}
{'firstname': 'Priya', 'lastname': 'Balakumaran'}
{'firstname': 'Ravi', 'lastname': 'Rahul'}
{'firstname': 'Siva', 'lastname': 'Prasad'}
{'firstname': 'Arun', 'lastname': 'Kumar'}
{'firstname': 'Awesome', 'lastname': 'Nator'}
{'firstname': 'Kalai', 'lastname': 'Selvi'}
{'firstname': 'Anna', 'lastname': 'Malai'}
{'firstname': 'Vanakkam', 'lastname': 'da mappla'}
{'firstname': 'Anbu', 'lastname': 'Sudha'}
#Search specific city
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["school"]
mycol = mydb["student"]
myquery = { "city": "London" }
mydoc = mycol.find(myquery)
for x in mydoc:
print(x)
{'_id': ObjectId('5eba60012a9545fa868c9ab1'), 'firstname': 'Awesome', 'lastname': 'Nator', 'city': 'London'}
#Search city >= "S"
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["school"]
mycol = mydb["student"]
myquery = { "city": { "$gt": "S" } }
mydoc = mycol.find(myquery)
for x in mydoc:
print(x)
{'_id': ObjectId('5eba60012a9545fa868c9aaf'), 'firstname': 'Siva', 'lastname': 'Prasad', 'city': 'Vadagudi'}
{'_id': 102, 'firstname': 'Anna', 'lastname': 'Malai', 'city': 'Singapore'}
{'_id': 103, 'firstname': 'Vanakkam', 'lastname': 'da mappla', 'city': 'Theni'}
#Regular Explression. city starts with 'S'
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["school"]
mycol = mydb["student"]
myquery = { "city": { "$regex": "S" } }
mydoc = mycol.find(myquery)
for x in mydoc:
print(x)
{'_id': 102, 'firstname': 'Anna', 'lastname': 'Malai', 'city': 'Singapore'}
#Order by City Ascending
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["school"]
mycol = mydb["student"]
myquery = { "city": { "$regex": "S" } }
mydoc = mycol.find().sort("city")
for x in mydoc:
print(x)
{'_id': 101, 'firstname': 'Kalai', 'lastname': 'Selvi', 'city': 'Aathalur'}
{'_id': 104, 'firstname': 'Anbu', 'lastname': 'Sudha', 'city': 'Bangalore'}
{'_id': ObjectId('5eba60012a9545fa868c9ab0'), 'firstname': 'Arun', 'lastname': 'Kumar', 'city': 'Kanadukathan'}
{'_id': ObjectId('5eba5f522a9545fa868c9aac'), 'firstname': 'Priya', 'lastname': 'Balakumaran', 'city': 'Kandanur'}
{'_id': ObjectId('5eba5eff2a9545fa868c9aa8'), 'firstname': 'Raja', 'lastname': 'Raman', 'city': 'Kottaiyur'}
{'_id': ObjectId('5eba60012a9545fa868c9ab1'), 'firstname': 'Awesome', 'lastname': 'Nator', 'city': 'London'}
{'_id': ObjectId('5eba60012a9545fa868c9aae'), 'firstname': 'Ravi', 'lastname': 'Rahul', 'city': 'Pallathur'}
{'_id': 102, 'firstname': 'Anna', 'lastname': 'Malai', 'city': 'Singapore'}
{'_id': 103, 'firstname': 'Vanakkam', 'lastname': 'da mappla', 'city': 'Theni'}
{'_id': ObjectId('5eba60012a9545fa868c9aaf'), 'firstname': 'Siva', 'lastname': 'Prasad', 'city': 'Vadagudi'}
#Order by City descending
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["school"]
mycol = mydb["student"]
myquery = { "city": { "$regex": "S" } }
mydoc = mycol.find().sort("city",-1)
for x in mydoc:
print(x)
{'_id': ObjectId('5eba60012a9545fa868c9aaf'), 'firstname': 'Siva', 'lastname': 'Prasad', 'city': 'Vadagudi'}
{'_id': 103, 'firstname': 'Vanakkam', 'lastname': 'da mappla', 'city': 'Theni'}
{'_id': 102, 'firstname': 'Anna', 'lastname': 'Malai', 'city': 'Singapore'}
{'_id': ObjectId('5eba60012a9545fa868c9aae'), 'firstname': 'Ravi', 'lastname': 'Rahul', 'city': 'Pallathur'}
{'_id': ObjectId('5eba60012a9545fa868c9ab1'), 'firstname': 'Awesome', 'lastname': 'Nator', 'city': 'London'}
{'_id': ObjectId('5eba5eff2a9545fa868c9aa8'), 'firstname': 'Raja', 'lastname': 'Raman', 'city': 'Kottaiyur'}
{'_id': ObjectId('5eba5f522a9545fa868c9aac'), 'firstname': 'Priya', 'lastname': 'Balakumaran', 'city': 'Kandanur'}
{'_id': ObjectId('5eba60012a9545fa868c9ab0'), 'firstname': 'Arun', 'lastname': 'Kumar', 'city': 'Kanadukathan'}
{'_id': 104, 'firstname': 'Anbu', 'lastname': 'Sudha', 'city': 'Bangalore'}
{'_id': 101, 'firstname': 'Kalai', 'lastname': 'Selvi', 'city': 'Aathalur'}
#Delete single doc
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["school"]
mycol = mydb["student"]
myquery = { "city": "London" }
mycol.delete_one(myquery)
#Delete multiple docs
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["school"]
mycol = mydb["student"]
myquery = { "city": { "$gt": "S" } } # city >= "S"
x = mycol.delete_many(myquery)
print(x.deleted_count, " documents deleted.")
3 documents deleted.
#Delete all docs / rows in a collection
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["school"]
mycol = mydb["student"]
myquery = { "city": { "$gt": "S" } }
x = mycol.delete_many({})
print(x.deleted_count, " documents deleted.")
6 documents deleted.
#Drop a collection
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["school"]
mycol = mydb["student"]
mycol.drop()
#Adding documents again
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["school"]
mycol = mydb["student"]
mydocs = [
{"_id": 101,"firstname":"Kalai","lastname":"Selvi","city":"Aathalur"},
{"_id": 102,"firstname":"Anna","lastname":"Malai","city":"Singapore"},
{"_id": 103,"firstname":"Vanakkam","lastname":"da mappla","city":"Theni"},
{"_id": 104 ,"firstname":"Anbu","lastname":"Sudha","city":"Bangalore"}
]
x = mycol.insert_many(mydocs)
#print list of the _id values of the inserted documents:
print(x.inserted_ids)
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["school"]
mycol = mydb["student"]
mydocs = [
{ "firstname":"Ravi","lastname":"Rahul","city":"Pallathur"},
{ "firstname":"Siva","lastname":"Prasad","city":"Vadagudi"},
{ "firstname":"Arun","lastname":"Kumar","city":"Kanadukathan"},
{ "firstname":"Awesome","lastname":"Nator","city":"London"}
]
x = mycol.insert_many(mydocs)
#print list of the _id values of the inserted documents:
print(x.inserted_ids)
#limit example.. display 3 records
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["school"]
mycol = mydb["student"]
myresult = mycol.find().limit(3)
#print the result:
for x in myresult:
print(x)
{'_id': ObjectId('5eba65732a9545fa868c9acf'), 'firstname': 'Ravi', 'lastname': 'Rahul', 'city': 'Pallathur'}
{'_id': ObjectId('5eba65732a9545fa868c9ad0'), 'firstname': 'Siva', 'lastname': 'Prasad', 'city': 'Vadagudi'}
{'_id': ObjectId('5eba65732a9545fa868c9ad1'), 'firstname': 'Arun', 'lastname': 'Kumar', 'city': 'Kanadukathan'}
#Update one record - Single record update
#London to Pudukkottai
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["school"]
mycol = mydb["student"]
myquery = { "city": "London" }
newvalues = { "$set": { "city": "Pudukkottai" } }
mycol.update_one(myquery, newvalues)
for x in mycol.find():
print(x)
{'_id': ObjectId('5eba65732a9545fa868c9acf'), 'firstname': 'Ravi', 'lastname': 'Rahul', 'city': 'Pallathur'}
{'_id': ObjectId('5eba65732a9545fa868c9ad0'), 'firstname': 'Siva', 'lastname': 'Prasad', 'city': 'Vadagudi'}
{'_id': ObjectId('5eba65732a9545fa868c9ad1'), 'firstname': 'Arun', 'lastname': 'Kumar', 'city': 'Kanadukathan'}
{'_id': ObjectId('5eba65732a9545fa868c9ad2'), 'firstname': 'Awesome', 'lastname': 'Nator', 'city': 'Pudukkottai'}
{'_id': 101, 'firstname': 'Kalai', 'lastname': 'Selvi', 'city': 'Aathalur'}
{'_id': 102, 'firstname': 'Anna', 'lastname': 'Malai', 'city': 'Singapore'}
{'_id': 103, 'firstname': 'Vanakkam', 'lastname': 'da mappla', 'city': 'Theni'}
{'_id': 104, 'firstname': 'Anbu', 'lastname': 'Sudha', 'city': 'Bangalore'}
#Update multiple documents
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["school"]
mycol = mydb["student"]
myquery = { "city": { "$gt": "S" } }
newvalues = { "$set": { "city": "Pillaiyarpatti" } }
x = mycol.update_many(myquery, newvalues)
print(x.modified_count, "documents updated.")
2 documents updated.
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