Make a password protected CSV file using Python

I have a script to generate a CSV file using the data from Postgres table. The script is working fine but i need to make this generated CSV file a password protected one.

How can i do that.

Below is the PY script used to generate the CSV file. What adjustments i have to make to make to password protect the generated CSV file?

Python version : 3.5

import csv
import os
import psycopg2

# File path and name.
filePath = '/Users/admin/documents/'
fileName = 'details.csv'

# Database connection variable.
connect = None

# Check if the file path exists.
if os.path.exists(filePath):

    try:

        # Connect to database.
        connect = psycopg2.connect(host='localhost', database='postgres',
                                   user='postgres', password='postgres',port='5432')

    except psycopg2.DatabaseError as e:

        # Confirm unsuccessful connection and stop program execution.
        print("Database connection unsuccessful.")
        quit()

    # Cursor to execute query.
    cursor = connect.cursor()

    # SQL to select data from the table.
    sqlSelect = "SELECT * FROM details"

    try:

        # Execute query.
        cursor.execute(sqlSelect)

        # Fetch the data returned.
        results = cursor.fetchall()

        # Extract the table headers.
        headers = [i[0] for i in cursor.description]

        # Open CSV file for writing.
        csvFile = csv.writer(open(filePath + fileName, 'w', newline=''),
                             delimiter=',', lineterminator='\r\n',
                             quoting=csv.QUOTE_ALL, escapechar='\\')

        # Add the headers and data to the CSV file.
        csvFile.writerow(headers)
        csvFile.writerows(results)

        # Message stating export successful.
        print("Data export successful.")

    except psycopg2.DatabaseError as e:

        # Message stating export unsuccessful.
        print("Data export unsuccessful.")
        quit()

    finally:

        # Close database connection.
        connect.close()

else:

    # Message stating file path does not exist.
    print("File path does not exist.")