Databases

python code for interacting with db

Recipes

psycopg2

Installation

pip install psycopg2

Establishing connection

​

import psycopg2 try: connection = psycopg2.connect(DATABASE_URL) cursor = connection.cursor()

# Print PostgreSQL Connection properties
print ( connection.get_dsn_parameters(),"\n")
# Print PostgreSQL version
cursor.execute("SELECT version();")
record = cursor.fetchone()
print("You are connected to - ", record,"\n")

except (Exception, psycopg2.Error) as error : print ("Error while connecting to PostgreSQL", error) finally:

#closing database connection.
    if(connection):
        cursor.close()
        connection.close()
        print("PostgreSQL connection is closed")

​```

```