python - 无尽的过程

Question

from cvxopt import matrix, solvers
c = matrix([-4., -5.])
G = matrix([[2., 1., -1., 0.], [1., 2., 0., -1.]])
h = matrix([3., 3., 0., 0.])
sol = solvers.lp(c, G, h)
print sol['x']

我开始运行此代码，但没有完成。PS。Python 2.7 JupyterNotebook