 """<STR_LIT>""" <EOL> def _check_backend ( ) : <EOL> from . . utils import _check_pyface_backend <EOL> try : <EOL> from pyface . api import warning <EOL> except ImportError : <EOL> warning = None <EOL> backend , status = _check_pyface_backend ( ) <EOL> if status == <NUM_LIT:0> : <EOL> return <EOL> elif status == <NUM_LIT:1> : <EOL> msg = ( "<STR_LIT>" <EOL> "<STR_LIT>" <EOL> "<STR_LIT>" <EOL> "<STR_LIT>" <EOL> "<STR_LIT>" % backend ) <EOL> elif status == <NUM_LIT:2> : <EOL> msg = ( "<STR_LIT>" 
 "<STR_LIT>" 
 """<STR_LIT>""" <EOL> def _check_backend ( ) : <EOL> from . . utils import _check_pyface_backend <EOL> try : <EOL> from pyface . api import warning <EOL> except ImportError : <EOL> warning = None <EOL> backend , status = _check_pyface_backend ( ) <EOL> if status == <NUM_LIT:0> : <EOL> return <EOL> elif status == <NUM_LIT:1> : <EOL> msg = ( "<STR_LIT>" <EOL> "<STR_LIT>" <EOL> "<STR_LIT>" <EOL> "<STR_LIT>" <EOL> "<STR_LIT>" % backend ) <EOL> elif status == <NUM_LIT:2> : <EOL> msg = ( "<STR_LIT>" <EOL> "<STR_LIT>" <EOL> "<STR_LIT>" % backend ) <EOL> warning ( None , msg , "<STR_LIT>" ) </s>
