(backend, arrays, expr)
return CONVERT_BACKENDS[backend](arrays, expr)
Build an expression, based on ``expr`` and initial arrays ``arrays``,
    that evaluates using backend ``backend``.
Build an expression, based on ``expr`` and initial arrays ``arrays``,
    that evaluates using backend ``backend``.
Build an expression based on expr and initial arrays arrays that evaluates using backend backend .
def build_expression(backend, arrays, expr):
    """Build an expression, based on ``expr`` and initial arrays ``arrays``,
    that evaluates using backend ``backend``.
    """
    return CONVERT_BACKENDS[backend](arrays, expr)
def build_expression ( backend , arrays , expr ) : return CONVERT_BACKENDS [ backend ] ( arrays , expr )