在Python下，如何将一个单词，例如，“hello”，进行变种（mutate）？-PHP中文网问答

最近通过http://anandology.com/python-practice-book/working-with-data.html上的问题练习Python，做到章节2.6－列表第32个问题的时候，写出了以下代码，是否有更好的代码，可以解决这个问题。原问题如下：

Problem 32: Write a function mutate to compute all words generated by
a single mutation on a given word. A mutation is defined as inserting
a character, deleting a character, replacing a character, or swapping
2 consecutive characters in a string. For simplicity consider only
letters from a to z.

我的代码如下：

#coding:utf-8 def mutate(ori_word): result = [] characters = [chr(w) for w in xrange(97,123)] split_word = [w for w in ori_word] #['h', 'e', 'l', 'l', 'o'] for x in xrange(0,5): word = split_word[:] word.pop(x) result.append(''.join(word)) # delete any one of the character in "hello" for c in characters: word = split_word[:] word[x] = c result.append(''.join(word)) # replace any one of the character in "hello" by using a to z for y in xrange(0,5): word = split_word[:] word[x] , word[y] = word[y], word[x] result.append(''.join(word)) # swap two character in "hello" return result word = mutate("hello")

def mutate(word): return [ value for i in range(len(word)) for letter in 'abcdefghijklmnopqrstuvwxyz' for value in [ word[:i+1]+word[i+2:i:-1]+word[i+3:], # swap word[:i]+letter+word[i:], # insert word[:i]+letter+word[i+1:], # replace word[:i]+word[i+1:] # remove (duplicated) ] ]