pg_dump & pg_restore password using python module subprocess

Question

Problem: Use the PSQL pg_dump and pg_restore in a Python script and using the subprocess module.

Backgrou

Answer 1

You can use environment variables https://www.postgresql.org/docs/11/libpq-envars.html and "--no-password" option for pg_dump.

    def dump_schema(host, dbname, user, password, **kwargs):
        command = f'pg_dump --host={host} ' \
            f'--dbname={dbname} ' \
            f'--username={user} ' \
            f'--no-password ' \
            f'--format=c ' \
            f'--file=/tmp/schema.dmp '

        proc = Popen(command, shell=True, env={
            'PGPASSWORD': password
        })
        proc.wait()