from psycopg2.extensions import adapt


def get_query(query, params=None):
    """Returns the query which is supposed to be run in Postgres.

    :param query:   String representation of the query
    :param params:  Dict of parameters
    :return:        String representation of the query when the parameters are filled out
    """
    actual_params = {k: adapt(v) for k, v in params.iteritems() if params}
    _query = query % actual_params
    return _query

query_to_run = 'SELECT * FROM accounts WHERE id = %(id)s'

params = {'id': '1'}

print(get_query(query_to_run, params))