import numpy as np

a=np.arange(ord('a'),ord('z'))
print(a)
a=a.astype(str)
for i in a:
    print(i,end=' ')
    print(int(i)-ord('a'),end=' ')
    a[int(i)-ord('a')]=chr(int(i))
print('\n',a)

[ 97  98  99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114
 115 116 117 118 119 120 121]
97 0 98 1 99 2 100 3 101 4 102 5 103 6 104 7 105 8 106 9 107 10 108 11 109 12 110 13 111 14 112 15 113 16 114 17 115 18 116 19 117 20 118 21 119 22 120 23 121 24 
 ['a' 'b' 'c' 'd' 'e' 'f' 'g' 'h' 'i' 'j' 'k' 'l' 'm' 'n' 'o' 'p' 'q' 'r'
 's' 't' 'u' 'v' 'w' 'x' 'y']

Process finished with exit code 0