python - 在python中用数字替换单词中的多个字母？

Question

似乎无法弄清楚如何用数字替换字母。例如

让我们说

     'a' , 'b' and 'c' should be replaced by "2".
     'd' , 'e' and 'n' should be replaced by "5".
     'g' , 'h' and 'i' should be replaced by "7".

我要替换的字符串是again。我想要得到的输出是 27275。这些数字的结果应该是字符串。

到目前为止我有:

def lett_to_num(word):
    text = str(word)
    abc = "a" or "b" or "c"
    aef = "d" or "e" or "n"
    ghi = "g" or "h" or "i"
    if abc in text:
        print "2"
    elif aef in text:
        print "5"
    elif ghi in text:
        print "7"

^我知道上面是错的^

我应该写什么功能？

Answer 1

从字符串使用 maketrans:

from string import maketrans
instr = "abcdenghi"
outstr = "222555777"
trans = maketrans(instr, outstr)
text = "again"
print text.translate(trans)

输出:

 27275

string 模块的 maketrans 提供了从 instr 到 outstr 的字节映射。当我们使用 translate 时，如果找到来自 instr 的任何字符，它将被替换为来自 outstr 的相应字符。