how convert integers in a matrix to their corresponding alphabets in python -

i trying convert matrix of integers corresponding alphabet in python. 1=a,b=2 etc have far xlabels matrix integers.

a = np.zeros((15,15)) x in xrange(0,15):     y in xrange(0,15):         a[x, y] = chr(ord('a')-1 + xlabels[0, 0]) print(a)

but error saying

valueerror: not convert string float: n

replace:

a = np.zeros((15,15))

with:

a = np.zeros((15,15), dtype=str)

Deter