Step by Step Guide to Connecting Python with MongoDB Using PyMongo for CRUD Operation

Step 1: Install Required Tools

1. Install Python

   • Download from python.org

   • Verify:

     python --version

2. Install MongoDB (Local)

   • Download from mongodb.com/try/download/community

   • Start MongoDB server:

     mongod

   OR use MongoDB Atlas (Cloud) (free cluster).

3. Install VS Code

   • Download VS Code

   • Install the Python extension (by Microsoft).

4. Install PyMongo Driver Open VS Code Terminal and run:

   pip install pymongo dnspython

Create Project in VS Code

1. Create a new folder → mongodb_python_app.

   

   
   

2. Open it in VS Code (File > Open Folder).

   
   

3. Create a new file → app.py.

   
   

Step 3: Write Python Code

Paste this into app.py:

from pymongo import MongoClient

# 1. Connect to local MongoDB (make sure mongod is running)

client = MongoClient("mongodb://localhost:27017/")

# 2. Create or switch to database

db = client["school_db"]

# 3. Create or switch to collection

students = db["students"]

# 4. Insert a document

student1 = {"name": "Rohan", "age": 23, "course": "Computer Science"}

students.insert_one(student1)

# 5. Insert multiple documents

student_list = [

    {"name": "Raj", "age": 21, "course": "Mathematics"},

    {"name": "Priya", "age": 22, "course": "Physics"}

]

students.insert_many(student_list)

# 6. Fetch all documents

print("\nAll Students:")

for doc in students.find():

    print(doc)

# 7. Fetch with condition

print("\nStudents enrolled in Physics:")

for doc in students.find({"course": "Physics"}):

    print(doc)

# 8. Update a document

students.update_one({"name": "Sharon"}, {"$set": {"course": "Data Science"}})

print("\nAfter Update:")

for doc in students.find({"name": "Sharon"}):

    print(doc)

# 9. Delete a document

students.delete_one({"name": "Raj"})

print("\nAfter Deletion:")

for doc in students.find():

    print(doc)

from pymongo import MongoClient.docx

Download DOCX • 15KB

Step 4: Run in VS Code

1. Open terminal in VS Code (Ctrl + ~).

2. Run:

   python app.py

   
   

Step 5: Verify in MongoDB Compass

• Open MongoDB Compass.

• Connect to the same URI you used in Python.

• Browse school → students collection.