def test_trio( ) :
    try :
        from tf import trio
    except:
        print( 'Cannot import tf.trio() ;; ' )
        return

    x1 = [0, -3, 0, -4, -2]
    x2 = [-3, 1, -2, 1, -3, -3, -2, -4, -1, -4]
    x3 = [2, -1, 0, 3, 0, 3, -2, -2, -1, -4, 3, -4, 3, -1, 3]
    x4 = []

    tests = [ x1, x2, x3, x4 ]

    for i in range( 0, len ( tests ) ) :
        try :
            x = tests[ i ]
            t = trio( x )
            print( 'trio( x' + str(i+1), '):', t )
        except:
            print( 'trio( x' + str(i+1), ') does not complete' )

def test_flatten() :
    try :
        from tf import flatten
    except:
        print( 'Cannot import tf.flatten() ;; ' )
        return

    d1 = [ [ 0 ],             [ 1, 2 ],             [ 1, 2, 3 ], [ 0 ] ]
    d2 = [ [ 1, 0, 1, 2, 2 ], [ 3, 0, 1, 1, 1, 0 ], [ 2 ],       [ 0, 0, 1 ] ]
    d3 = [ [ 3, 0, 3],        [ 3, 0, 3, 0, 1],     [ 1, 0, 2 ] ]
    d4 = [ ]

    tests = [ d1, d2, d3, d4 ]

    for i in range( 0, len ( tests ) ) :
        try :
            d = tests[ i ]
            f = flatten( d )
            print( 'flatten( d' + str(i+1), '):', f )
        except:
            print( 'flatten( d' + str(i+1), ') does not complete' )

if ( __name__ == '__main__' ) :
    try :
        import tf
        test_trio()

        print()

        test_flatten()
    except:
        print( 'Cannot import tf' )