Postgresql pg_dump parser

pg_dumb.py

import argparse
from urllib.parse import urlparse


def parse_command(database_url, exclude_tables):
    parsed_url = urlparse(database_url)
    parsed_data = {
        'hostname': parsed_url.hostname,
        'username': parsed_url.username,
        'password': parsed_url.password,
        'database': parsed_url.path.replace('/', ''),
        'exclude_tables': '',
    }
    if exclude_tables:
        parsed_data['exclude_tables'] = ' '.join(['--exclude-table-data={}'.format(table) for table in exclude_tables])
    return parsed_data


parser = argparse.ArgumentParser()
parser.add_argument('database_url', help='Postgresql DATABASE_URL', type=str)
parser.add_argument('--exclude_tables', help='Exclude table data from backup',  nargs='*')
args = parser.parse_args()
database_url = args.database_url
exclude_tables = args.exclude_tables

command = 'PGPASSWORD={password} pg_dump -v -U {username} -Fc -h {hostname} {exclude_tables} {database} > database_backup.dump'
parsed_data = parse_command(database_url, exclude_tables)
print(command.format(**parsed_data))