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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def group_create(groupname,
                 user=None,
                 host=None,
                 port=None,
                 maintenance_db=None,
                 password=None,
                 createdb=None,
                 createroles=None,
                 encrypted=None,
                 login=None,
                 inherit=None,
                 superuser=None,
                 replication=None,
                 rolepassword=None,
                 groups=None,
                 runas=None):
    '''
    Creates a Postgres group. A group is postgres is similar to a user, but
    cannot login.

    CLI Example:

    .. code-block:: bash

        salt '*' postgres.group_create 'groupname' user='user' \\
                host='hostname' port='port' password='password' \\
                rolepassword='rolepassword'
    '''
    return _role_create(groupname,
                        user=user,
                        typ_='group',
                        host=host,
                        port=port,
                        maintenance_db=maintenance_db,
                        password=password,
                        createdb=createdb,
                        createroles=createroles,
                        encrypted=encrypted,
                        login=login,
                        inherit=inherit,
                        superuser=superuser,
                        replication=replication,
                        rolepassword=rolepassword,
                        groups=groups,
                        runas=runas)