def testChooseColumn(self):
matrix = SparseMatrix(rows1)
dlx = DLX(matrix)
coltable = matrix.column_table
column = dlx.choose_column()
assert coltable[0] == column
matrix.cover(column)
# See Figure 3; column D now only has one node in it.
after_cover = dlx.choose_column()
assert coltable[3] == after_cover
def testChooseColumn(self):
matrix = SparseMatrix(rows1)
dlx = DLX(matrix)
coltable = matrix.column_table
column = dlx.choose_column()
assert coltable[0] == column
matrix.cover(column)
# See Figure 3; column D now only has one node in it.
after_cover = dlx.choose_column()
assert coltable[3] == after_cover
