在Python中，一对一对应：字母与数字的转换操作

比较字母与数字的对应关系：

# coding:utf-8

X = []
Y = []
for i in range(26):
    X.append(i+1)
    Y.append(chr(97+i))
print(X)
print(Y)

def get_index(m):
    n = []
    for i in m:
        n.append(Y.index(i)+1)
    print(n)

def get_letters(n):
    L = []
    for i in n:
        L.append(Y[i])
    print(L)

get_index('aaaa')
get_index('bdzb')
get_index('cgac')
get_index('djzd')
get_letters([4,12,0,4])

get_index('didiidid')
get_index('diidiidd')

结果如下：

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26]
['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', 'z']
[1, 1, 1, 1]
[2, 4, 26, 2]
[3, 7, 1, 3]
[4, 10, 26, 4]
['e', 'm', 'a', 'e']
[4, 9, 4, 9, 9, 4, 9, 4]
[4, 9, 9, 4, 9, 9, 4, 4]