Pythonic Way To Get Index,column For Value == 1

I currently have a MxN dataframe which contains a solution to an optimization problem. 'Active' i,j for i in {M} and j in {N} pairs are represented by 1 and 'inactive' pairs by 0.

Solution 1:

>>> import numpy
>>> a = numpy.array([[1, 0, 1], [0, 1, 1], [0, 1, 0]])
>>> numpy.transpose(numpy.nonzero(a))
array([[0, 0],
       [0, 2],
       [1, 1],
       [1, 2],
       [2, 1]])