devart-postgresql-connector 1.3.0

New level of functionality and performance in data access via Python

Python Connector for PostgreSQL

Python Connector for PostgreSQL is a connectivity solution for accessing PostgreSQL databases from Python applications. It fully implements the Python DB API 2.0 specification. The connector is distributed as a wheel package for Windows, macOS, and Linux.

Direct connection

The connector enables you to establish a direct connection to PostgreSQL from a Python application via TCP/IP, eliminating the need for the database client library. A direct connection increases the speed of data transmission between the application and PostgreSQL database server. It also streamlines the deployment process since you don't have to distribute any client libraries with the application.

Secure communication

Connecting

To establish a connection to a PostgreSQL database, import the connector and use the connect() method with your connection parameters.

Import the connector

First, import the PostgreSQL connector module:

import devart.postgresql as postgresql

Establish a connection

Call the connect() method and obtain a connection object.

my_connection = postgresql.connect(
    Server="your_server",    Database="your_database",    UserId="your_username",    Password="your_password"
)

Replace the example values with your actual connection values.

Querying data

Once connected to PostgreSQL, you can execute SQL queries to retrieve data from your PostgreSQL database.

Execute a query

Create a cursor object using the cursor() connection method.

my_cursor = my_connection.cursor()

Execute a SQL query using the execute() cursor method.

my_cursor.execute("SELECT * FROM employees")

Retrieve results using one of the fetch*() methods.

for row in my_cursor.fetchall(): 
    print(row)

Parameterized queries

You can use parameterized queries to pass variable values to your SQL statements. This allows you to reuse the same query with different data and helps to prevent SQL injection attacks.

Pass parameters as a list or tuple to the execute() method:

query = "SELECT Id, Name FROM Contact WHERE Name = ? AND Email = ?"
params = ["Jordan Sanders", "[e-mail]"]
my_cursor.execute(query, params)
results = my_cursor.fetchall()
for row in results:
    print(row)

Each placeholder ? in the query is replaced with a corresponding value from the parameter list.

Ordering and activating the license

You can purchase a license for the connector on the ordering page:
https://www.devart.com/python/postgresql/ordering.html

To activate the license, follow the instructions in the documentation:
https://docs.devart.com/python/postgresql/activate-a-license.htm

What's new

Python Connector for PostgreSQL 1.3

• Added support for Python 3.14
• Added support for PostgreSQL 18
• Added support for the Bearer Token authentication when using an HTTP tunnel
• Added support for password-protected private keys for the SSL protocol
• Added support for the COPY ... TO STDOUT statement
• Improved support for array data types
• Improved performance in opening a connection