=====Function Descriptions=====
identity

The identity tool returns an identity array. An identity array is a square matrix with all the main diagonal elements as 1 and the rest as 0. The default type of elements is float.

import numpy
print numpy.identity(3) #3 is for dimension 3 X 3

Output

[[ 1. 0. 0.]
[ 0. 1. 0.]
[ 0. 0. 1.]]

eye

The eye tool returns a 2-D array with 1's as the diagonal and 0's elsewhere. The diagonal can be main, upper or lower depending on the optional parameter k. A positive k is for the upper diagonal, a negative k is for the lower, and a 0 k (default) is for the main diagonal.

import numpy
print numpy.eye(8, 7, k = 1) # 8 X 7 Dimensional array with first upper diagonal 1.

Output

[[ 0. 1. 0. 0. 0. 0. 0.]
[ 0. 0. 1. 0. 0. 0. 0.]
[ 0. 0. 0. 1. 0. 0. 0.]
[ 0. 0. 0. 0. 1. 0. 0.]
[ 0. 0. 0. 0. 0. 1. 0.]
[ 0. 0. 0. 0. 0. 0. 1.]
[ 0. 0. 0. 0. 0. 0. 0.]
[ 0. 0. 0. 0. 0. 0. 0.]]

print numpy.eye(8, 7, k = -2) # 8 X 7 Dimensional array with second lower diagonal 1.

=====Problem Statement=====
Your task is to print an array of size NXM with its main diagonal elements as 1's and 0's everywhere else.

=====Input Format=====
A single line containing the space separated values of N and M.
N denotes the rows.
M denotes the columns.

=====Output Format=====
Print the desired NXM array.

见题面

见题面