from numpy import *
# array=random.rand(4,4)
# print(array)
# randMat=mat(array)
# # print(randMat)
# invrandMat=randMat.I
# print(randMat*invrandMat)


# d={'a':20,'b':15,'c':30}
# print(d.items())
#
# list=[[1,'1'],['aaa',23],[4.4,'liu']]
# print(list)
# print(mat(list))
#
# a = mat([[0, 1, 2, 3, 4], [5, 6, 7, 8, 9], [2, 4, 6, 8, 0]])
# print(a[:])
# print(a[1,2])
# print(a[0:2,0:3:2])
# b = [[0, 1, 2, 3, 4], [5, 6, 7, 8, 9], [2, 4, 6, 8, 0]]
# print(b[1][0:2])
