How to use the delocate.tools.open_rw function in delocate

def _copyfile(in_fname, out_fname):
    # Copies files without read / write permission
    perms = chmod_perms(in_fname)
    with open_rw(in_fname, 'rb') as fobj:
        contents = fobj.read()
    with open_rw(out_fname, 'wb') as fobj:
        fobj.write(contents)
    os.chmod(out_fname, perms)

def _copyfile(in_fname, out_fname):
    # Copies files without read / write permission
    perms = chmod_perms(in_fname)
    with open_rw(in_fname, 'rb') as fobj:
        contents = fobj.read()
    with open_rw(out_fname, 'wb') as fobj:
        fobj.write(contents)
    os.chmod(out_fname, perms)

def _open_for_csv(name, mode):
    """ Deal with Python 2/3 open API differences """
    if sys.version_info[0] < 3:
        return open_rw(name, mode + 'b')
    return open_rw(name, mode, newline='', encoding='utf-8')

def _open_for_csv(name, mode):
    """ Deal with Python 2/3 open API differences """
    if sys.version_info[0] < 3:
        return open_rw(name, mode + 'b')
    return open_rw(name, mode, newline='', encoding='utf-8')